Internal support hints: Difference between revisions

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[[Category:Administration]]
{{DISPLAYTITLE:Internal Support Hints}}


==Important note: ==
{{Warning|1=This documentation is for the internal support team. Use at your own risk and test on non-production servers first.}}
Following articles are designed to be used by internal support team. You can find hints usauseful but please use it at your own risk (use on testing servers first)


= Testing configure options =
= Quick Reference =
If you need to test configure options without need to modify the config file or database settings, you can use json_config option:
--json_config='[{"id_sensor":"11"},{"interface":"lo"},{"natalias","8.8.8.8 10.10.100.50;9.9.9.9 192.168.88.33"}]'
(The otpions defined using '''json_config''' command line option will overrides the configfile and database settings)


== Examples ==
<kroki lang="mermaid">
This will override options '''rtpip_find_endpoints,rrd,natalias''' no matter what is set in config file.
%%{init: {'flowchart': {'nodeSpacing': 10, 'rankSpacing': 25}}}%%
./voipmonitor --config-file=config/voipmonitor.conf -p XobmuJ -b voipmonitor_ipv6 -k -v1,pcap_stat_period=5,hash_rtp,rtp_streams -rpba:/totest/test.pcap --json_config='[{"rtpip_find_endpoints","yes"},{"rrd","no"},{"natalias","8.8.8.8 10.10.100.50;9.9.9.9 192.168.88.33"}]'
flowchart LR
    subgraph Test["Testing"]
        A[json_config] --> B[Regexp/Country]
        B --> C[Billing]
    end
    subgraph Debug["Debugging"]
        D[Jemalloc] --> E[Threads]
        E --> F[Charts crash]
    end
    subgraph Tools["Tools"]
        G[PCAP replay] --> H[Manager API]
        H --> I[Scripts]
    end
</kroki>


= Testing regexp / country rules / billing =
= Testing Configuration =
== Regexp test ==
/usr/local/sbin/voipmonitor --config-file=/etc/voipmonitor-test.conf -k -v1 --test-regexp '^800880080[1-9][0-9][*]|80088008012345|'


== Country assignment test ==
== Override Settings with json_config ==
/usr/local/sbin/voipmonitor --config-file=/etc/voipmonitor-test.conf -k -v1 --find-country-for-ip=102.140.68.113
/usr/local/sbin/voipmonitor --config-file=/etc/voipmonitor-test.conf -k -v1 --find-country-for-number 0034*12345


* gui version (obsolete)
Override config file and database settings without editing files:


root@vmweb:GUI_ROOT# php php/run.php testFindCountryForNumber -n 4909699999
<syntaxhighlight lang="bash">
number:           4909699999
voipmonitor --config-file=/etc/voipmonitor.conf -k -v1 \
country:         DE
  --json_config='[{"id_sensor":"11"},{"interface":"lo"},{"natalias":"8.8.8.8 10.10.100.50"}]'
is_international: Y
</syntaxhighlight>


== pricing / billing test ==
{{Tip|Useful for quick testing of specific parameters. Options in json_config take precedence over config file and DB settings.}}
voipmonitor --config-file=config/voipmonitor.conf -k -v1 --test-billing test_data/billing


=== Example of test_data/billing file===
== Regexp / Country / Billing Tests ==
Columns order
  - calldate
  - connect_duration
  - caller
  - called
  - sipcallerip
  - sipcalledip
  - expected price operator - (voluntary option)
  - expected price customer - (voluntary option)


2018-05-09 12:00,120,+4121353333,+41792826527,192.168.101.10,192.168.101.151,800,8
{| class="wikitable"
2018-05-09 12:00,120,+4121353333,+41792826527,192.168.101.10,192.168.101.151,800,8.1
! Test Type !! Command
2018-05-09 12:00,120,+4121353333,+41792826527,192.168.101.10,192.168.101.151
|-
| Regexp pattern || <code>voipmonitor --config-file=/etc/voipmonitor.conf -k -v1 --test-regexp '^800...[1-9][0-9]'</code>
|-
| Country by IP || <code>voipmonitor --config-file=/etc/voipmonitor.conf -k -v1 --find-country-for-ip=102.140.68.113</code>
|-
| Country by number || <code>voipmonitor --config-file=/etc/voipmonitor.conf -k -v1 --find-country-for-number 0034*12345</code>
|-
| Billing test || <code>voipmonitor --config-file=/etc/voipmonitor.conf -k -v1 --test-billing test_data/billing</code>
|}


= License Hints =
'''Billing test file format''' (CSV):
== Write state to db (count of cc channels for license purposse) ==
<syntaxhighlight lang="text">
php /var/www/html/php/run.php saveCallStatistics
# calldate,connect_duration,caller,called,sipcallerip,sipcalledip,[exp_price_op],[exp_price_cust]
2018-05-09 12:00,120,+4121353333,+41792826527,192.168.101.10,192.168.101.151,800,8
</syntaxhighlight>


== keep the license updated without processing alerts reports ==
= License Management =
(put into /etc/crontab)
04 04  * * *  root php run.php runUpdateLicenseKey


== License Details ==
{| class="wikitable"
=== detail on channels count usage ===
! Task !! Command
php /var/www/html/php/run.php checkLicense -v
|-
Less details:
| Write channel stats to DB || <code>php /var/www/html/php/run.php saveCallStatistics</code>
php /var/www/html/php/run.php checkLicense -v|grep max_peak -A3 -B1
|-
| Check license details || <code>php /var/www/html/php/run.php checkLicense -v</code>
|-
| Check max peak only || <code>php /var/www/html/php/run.php checkLicense -v <nowiki>|</nowiki> grep max_peak -A3 -B1</code>
|-
| Get token from DB || <code>SELECT content FROM voipmonitor.system WHERE type='license token';</code>
|-
| View license file || <code>cat /var/www/html/key.php</code>
|}


=== license file ===
'''Auto-update license via cron''' (without processing alerts/reports):
cat /var/www/html/key.php


=== Get current license token from db ===
<syntaxhighlight lang="bash">
mysql> select content from voipmonitor.system where type='license token';
04 04 * * * root php /var/www/html/php/run.php runUpdateLicenseKey
</syntaxhighlight>


= SCRIPTs for better run control =
= Utility Scripts =
== Alerts and Report ==
When alerts taking longer time to process then interval is schedulled it can cause out of memory or high load to CPU after some time because same alert is processed multipletimes for various time ranges. Following script allows manual run of disabled alert in GUI via crontab - its benefit is that it will run multiple alerts at same time unlike normal run where is processed one alert by one.


Follow this link [[script-for-multi-Instances-alerts-processing]] (deprecated)
{| class="wikitable"
! Script !! Purpose !! Details
|-
| Parallel alerts || Process alerts faster || Enable in '''Settings → System Configuration → Advanced → Number of parallel tasks'''
|-
| [[script-for-big-batchdownloads|Batch download]] || Download >1000 audio files || Bypasses GUI limit of 1000 CDRs
|-
| [[script-for-GUI-cron-control-oom|RAM control]] || Prevent OOM killer || Sets <code>oom_adj_score</code> for PHP threads
|-
| [[script-for-probes-backup|Probe backup]] || Backup all probe configs || Requires SSH access without password
|}


The GUI now supports parralel run of the alerts/report - enable it in system settings->Advanced->Number of parallel tasks
= Debugging =


== Batch download for more then 1000CDRs ==
== Charts Binary Crash ==
When you need to download lot of audio files - you use GUI->menu->cdr batch download,but it allows only 1000calls to process with one GUI's query.


Following script allows you to create audio from longer set of CDRs, also it process in multiple instances to get audio faster (beware of HDD IO/CPU) [[script-for-big-batchdownloads]]
When dmesg or Apache log shows charts crash:
<syntaxhighlight lang="text">
charts-x86_64[7321]: segfault at 10 ip 0000000000412553...
</syntaxhighlight>


== RAM (alerts / dashboards cache) ==
'''Debug procedure:'''
When there is lot of CDRs then alerts or caching of dashboard data can take lot of RAM, folloowing script will control if some php thread will not consume over limit, when it does, its oom_adj_score is set to be killed first (prevent killing of voipmonitor sniffer od db when running on same server)
<syntaxhighlight lang="bash">
# Create debug folder
mkdir /tmp/vm_charts_parameters


Follow link [[script-for-GUI-cron-control-oom]]
# After GUI creates charts, test with saved arguments
/var/www/html/bin/charts-x86_64 -i /tmp/vm_charts_parameters/files
</syntaxhighlight>


== Backup the settings from all probes and GUI ==
== Memory Leak Detection (Jemalloc) ==
The script gets voipmonitor.conf from all probes and do GUI backup config tables from db. Requires ssh access without password, error redirect to /dev/null, run it using cron


Follow link [[script-for-probes-backup]]
=== Compile Jemalloc ===


= charts binary crashes debug steps =
<syntaxhighlight lang="bash">
When apachelog or dmesg reports crashes of vm's charts binary like
# Download from https://github.com/jemalloc/jemalloc
Aug 20 10:32:30 C17VOIPMONDB02 kernel: charts-x86_64[7321]: segfault at 10 ip 0000000000412553 sp 00007ffff2638430 error 4 in charts-x86_64[400000+6c6000]
./autogen.sh
== create debug folder for charts ==
./configure --enable-prof
Create vm_charts_parameters in /tmp
make && make install
</syntaxhighlight>


after GUI will create some charts there files with arguments will be created.
=== Compile VoIPmonitor with Jemalloc ===
== test Arguments passed to charts binary ==
/var/www/html/bin/charts-x86_64 -i /tmp/vm_charts_parameters/files


= voipmonitor sniffer memory leaks detect and debug =
Edit <code>config.h</code>:
When voipmonitor uses more and more RAM (RSS/VSZ stat in syslog) without processing more CALLs (regs/messages) following steps can tell you where the RAM ends (it can be leak or some thread overload)
<syntaxhighlight lang="c">
== compile je_malloc ==
#define HAVE_LIBTCMALLOC 0
Download jemalloc from https://github.com/jemalloc/jemalloc
#define HAVE_LIBJEMALLOC 1
./autogen.sh
</syntaxhighlight>
#requires development tools Deb/ubu apt install build-essential, centos/rh yum groupinstall 'Development Tools'
./configure --enable-prof
make
make install


== enable jemalloc for voipmonitor and compile it ==
Edit <code>Makefile</code>:
./configure
<syntaxhighlight lang="makefile">
edit config.h,to have there
# Change -O2 to -O0 (disable optimization)
#define HAVE_LIBTCMALLOC 0
LIBS = ${SHARED_LIBS} -ljemalloc
#define HAVE_LIBJEMALLOC 1
</syntaxhighlight>
edit Makefile and disable optimization and add ljemalloc to libs
substitute there -O2 with -O0 (It is capital o followed by zero)
LIBS = ${SHARED_LIBS} -ljemalloc


Finish compilation
<syntaxhighlight lang="bash">
make clean
make clean && make -j8
make -j8
</syntaxhighlight>


== enable X88 compatible sources and recompile ==
=== Run with Jemalloc ===
Copy sniffer sources with compiled binary to new location and recreate binary with -X88 (This is necessary to get correct memory allocation for debuging usin jeprof)
cp -a /usr/src/voipmonitor-git /usr/src/sniffer-git-jemalloc-X88
LD_PRELOAD=/usr/local/lib/libjemalloc.so ./voipmonitor -k -v1 -c -X88
#It will list of source files modification,then re-make
make clean
make


More detailed instructions on debuging using X88 [[X88-memoryConsumptionDebug]]
Modify <code>/etc/init.d/voipmonitor</code> start section:
<syntaxhighlight lang="bash">
LD_PRELOAD=/usr/local/lib/libjemalloc.so MALLOC_CONF='prof:true' /usr/local/src/voipmonitor --config-file $CONFIGFILE --pid-file $PIDFILE $ARGS
</syntaxhighlight>


== Modify init file or run sniffer manually with extra env arguments and parameters ==
=== Generate Memory Report ===
=== edit /etc/init.d/voipmonitor ===
ARGS="-v 1,force_log_sqlq,memory_stat,memory_stat_ignore_limit=100000"
#and in start section (2places) of a script
LD_PRELOAD=/usr/local/lib/libjemalloc.so MALLOC_CONF='prof:true' /usr/src/sniffer-git-jemalloc-X88/voipmonitor --config-file $CONFIGFILE --pid-file $PIDFILE $ARGS


=== or run it from konsole / when sniffer service stopped ===
<syntaxhighlight lang="bash">
  LD_PRELOAD=/usr/local/lib/libjemalloc.so MALLOC_CONF='prof:true' /usr/src/sniffer-git-jemalloc-X88/voipmonitor --config-file=/etc/voipmonitor.conf -v 1,force_log_sqlq,memory_stat_ex,memory_stat_ignore_limit=100000,heapsafe
# Install dependencies
apt install graphviz ghostscript # or: yum install graphviz ghostscript


== Check results ==
# Generate PDF report
in some interval you should check the results of memory usage with
echo 'jemalloc_stat_full' | nc 127.0.0.1 5029 > /tmp/je_prof
=== je_prof.pdf ===
jeprof --show_bytes --pdf /usr/local/src/sniffer/voipmonitor /tmp/je_prof > je_prof.pdf
yum install graphviz ghostscript
</syntaxhighlight>
echo 'jemalloc_stat_full' | nc 127.0.0.1 5029 > /tmp/je_prof; jeprof --show_bytes --pdf /usr/src/sniffer-git-jemalloc-X88/voipmonitor /tmp/je_prof > je_prof.pdf


=== sniffer_memory.txt ===
=== X88 Mode (Detailed Memory Debug) ===
echo 'jemalloc_stat_full' | nc 127.0.0.1 5029


=== script for periodical collecting ===
For more detailed memory allocation info:
<syntaxhighlight lang="bash">
cp -a /usr/src/voipmonitor-git /usr/src/sniffer-git-jemalloc-X88
LD_PRELOAD=/usr/local/lib/libjemalloc.so ./voipmonitor -k -v1 -c -X88
make clean && make
</syntaxhighlight>


#!/bin/bash
Run with extra verbose options:
DATE=`date '+%Y%m%d_%H:%M:%S'`
<syntaxhighlight lang="bash">
LOGDIR=/root/vm_debug/log/$DATE
LD_PRELOAD=/usr/local/lib/libjemalloc.so MALLOC_CONF='prof:true' ./voipmonitor \
mkdir -p $LOGDIR
  --config-file=/etc/voipmonitor.conf \
pdftmpname=/tmp/je_prof
  -v 1,force_log_sqlq,memory_stat_ex,memory_stat_ignore_limit=100000,heapsafe
pdfname=$LOGDIR/je_prof.pdf
</syntaxhighlight>
txtname=$LOGDIR/mem_stat.txt
senname=$LOGDIR/senlog.txt
echo 'jemalloc_stat_full' | nc 127.0.0.1 5029 > $pdftmpname 2>&1
/usr/local/bin/jeprof --show_bytes --pdf /usr/src/sniffer-git-jemalloc-X88/voipmonitor $pdftmpname > $pdfname 2>&1
echo memory_stat | nc 127.0.0.1 5029 > $txtname 2>&1
echo sniffer_stats | nc 127.0.0.1 5029 > $senname 2>&1
rm $pdftmpname


= voipmonitor sniffer compile notes ss7 (wireshark) module =
See: [[X88-memoryConsumptionDebug]]
(requires ws version 3.2):


== modify config.h ==
== Thread Debugging ==
#define HAVE_LIBWIRESHARK 1
#define LIBWIRESHARK_VERSION 30200


== modify Makefile's INCLUDE ==
{| class="wikitable"
-I/usr/include/wireshark
! Method !! Usage
== modify Makefile's SHARED_LIBS==
|-
-lwiretap -lwireshark -lwsutil
| Log thread CPU || Add <code>-v1,threads_cpu_log</code> to command line
|-
| List threads || <code>echo 'sniffer_threads' | nc 127.0.0.1 5029</code>
|-
| Extended info || Set <code>sniffer_threads_ext=yes</code> in config (requires compile with <code>SNIFFER_THREADS_EXT true</code>)
|}


internal build in JIRA:/opt/debian-7-64bit
'''sniffer_threads options:'''
== disable optimize in Makefile==
* <code>no_sort</code> - don't sort by load
change -O2 to -O0
* <code>only_traffic</code> - only threads with traffic
* <code>all</code> - include unloaded threads
* <code>line</code> - simple line output


== compile ==
== SS7 Module Compilation ==
./configure && make clean && make ss7


= testing customer pcaps =
Requires Wireshark 3.2.
== testing special pcaps ==
=== ipfix ===
Run first instance of voipmonitor that will act as receiver for packets and will push CDRs to db
in the settings enable ipfix options:
ipfix = yes
ipfix_bind_ip = 0.0.0.0
ipfix_bind_port = 12345


Then run scecond instance that will act as source for replay the ipfix encapsulated pcap
Edit <code>config.h</code>:
./voipmonitor --config-file=config/voipmonitor.conf -k -v1 --ipfix-client-emulation='/tmp/TCPdump_ipfix_stream.pcap;1.2.3.4;8.8.8.8;127.0.0.1;12345'
<syntaxhighlight lang="c">
Params:
#define HAVE_LIBWIRESHARK 1
pcap file
#define LIBWIRESHARK_VERSION 30200
2 IP address - 1.ip fix client,2.ip fix server
</syntaxhighlight>
last IP : port telling to where to send the ipfix stream (IP:port of ipfix options set for the 1.st instance)


Edit <code>Makefile</code>:
<syntaxhighlight lang="makefile">
INCLUDE += -I/usr/include/wireshark
SHARED_LIBS += -lwiretap -lwireshark -lwsutil
# Change -O2 to -O0
</syntaxhighlight>


<syntaxhighlight lang="bash">
./configure && make clean && make ss7
</syntaxhighlight>


== testing via basic upload aka GUI upload ==
= PCAP Testing =
voipmonitor --config-file=/etc/voipmonitor-customer.conf -r /tmp/file.pcap
== testing via packetbuffer upload ==
=== time shift to now, increased speed of replaying ===
voipmonitor --config-file=/etc/voipmonitor-customer.conf -rpbsa9: /tmp/file.pcap
=== no time shift via pb===
voipmonitor --config-file=/etc/voipmonitor-customer.conf -rpb: /tmp/file.pcap
=== tcpreplay to running service ===
you need to enable additional argument when starting the service in /etc/init.d/voipmonitor
ARGS="-v 1,dump_call_flags,tcpreplay"
then use tcpreplay
tcpreplay -i eth0 /tmp/l/x.pcap
when error appears like
sending out eth0
processing file: /tmp/l/x.pcap
Warning in tcpreplay.c:replay_file() line 227:
/tmp/l/x.pcap DLT (LINUX_SLL) does not match that of the outbound interface: eth0 (EN10MB)
probably captured on any interface and layer2 missing, here follow stpes on how to add it:


==== adding layer2 to pcap ====
== Basic Methods ==
after capture was done on any interface and you need to replay it to hw interface you need to add layer2 (at least in 3.4.3 v.tcpreplay)
tcprewrite --dlt=enet -i /tmp/l/x.pcap -o /tmp/l/x_enet-encaps.pcap
tcprewrite --enet-dmac=00:55:22:AF:C6:37 --enet-smac=00:44:66:FC:29:AF --infile=/tmp/l/x_enet-encaps.pcap --outfile=/tmp/l/x_enet-encaps-l2.pcap


==== rewrite IPv4 address in whole pcap ====
{| class="wikitable"
when you need to test alert based on IP adresses (also country continent alert based on IPs) you can find usefull to change IP address in pcap and use it multiple times with various addresses:
! Method !! Command
tcprewrite --pnat=8.7.6.5/32:1.2.3.4/32 -i ./7efd0e8b87a54f48ac04b7a49fdf5669.pcap -o ./7e-rew.pcap
|-
| Basic upload || <code>voipmonitor --config-file=/etc/voipmonitor.conf -r /tmp/file.pcap</code>
|-
| Via packetbuffer (fast) || <code>voipmonitor --config-file=/etc/voipmonitor.conf -rpbsa9: /tmp/file.pcap</code>
|-
| Via packetbuffer (original time) || <code>voipmonitor --config-file=/etc/voipmonitor.conf -rpb: /tmp/file.pcap</code>
|}


= Rename mysql database =
== IPFIX Testing ==
It's not possible to do it via direct command. You need to use '''RENAME TABLE''' command.
With this SELECT you generate the commands for the rename of the all tables in the database. (Replace OLD_DB_NAME and NEW_DB_NAME)


SELECT CONCAT('RENAME TABLE ',table_schema,'.',table_name,
'''Receiver instance:'''
    ' TO ','NEW_DB_NAME.',table_name,';')
<syntaxhighlight lang="ini">
FROM information_schema.TABLES
ipfix = yes
WHERE table_schema LIKE 'OLD_DB_NAME';
ipfix_bind_ip = 0.0.0.0
ipfix_bind_port = 12345
</syntaxhighlight>


The output:
'''Sender instance:'''
<syntaxhighlight lang="bash">
voipmonitor --config-file=/etc/voipmonitor.conf -k -v1 \
  --ipfix-client-emulation='/tmp/ipfix.pcap;1.2.3.4;8.8.8.8;127.0.0.1;12345'
# Parameters: pcap_file;client_ip;server_ip;dest_ip;dest_port
</syntaxhighlight>
=== IPFIX PCAP Download Behavior ===


RENAME TABLE OLD_DB_NAME.table1 TO NEW_DB_NAME.table1;
'''Key fact:''' IPFIX data is internally converted to packet format for processing. This means:
RENAME TABLE OLD_DB_NAME.table2 TO NEW_DB_NAME.table2;
* '''PCAP files CAN be downloaded''' from the GUI for IPFIX-sourced calls
RENAME TABLE OLD_DB_NAME.tableX TO NEW_DB_NAME.tableX;
* SIP signaling is reconstructed from the IPFIX data
* '''RTP streams are NOT included''' in the PCAP - only QoS metrics from IPFIX data are available, not actual audio packets


Run these commands a you are ready.
When downloading PCAP from IPFIX calls with TLS, TCP sequence numbers may be set to 0 causing Wireshark to display incorrectly. Disable TCP sequence analysis in Wireshark preferences to view all packets.
== Tcpreplay ==


'''Attention! Sometimes you can have a problem with moving of the foreign keys.'''
Enable in <code>/etc/init.d/voipmonitor</code>:
<syntaxhighlight lang="bash">
ARGS="-v 1,dump_call_flags,tcpreplay"
</syntaxhighlight>


= disabling TCP sack =
'''Add Layer 2 if missing''' (for captures done on "any" interface):
On buggy kernels (all before 2019/03) following prevents SACK issue
<syntaxhighlight lang="bash">
sideback is that on lossy lines (packet lost or big delays) the tcp traffic will increase)
tcprewrite --dlt=enet -i /tmp/x.pcap -o /tmp/x_enet.pcap
echo "0" > /proc/sys/net/ipv4/tcp_sack
tcprewrite --enet-dmac=00:55:22:AF:C6:37 --enet-smac=00:44:66:FC:29:AF \
  --infile=/tmp/x_enet.pcap --outfile=/tmp/x_l2.pcap
</syntaxhighlight>


= MacOS high sierra in virtual box (on windows) =
'''Rewrite IP addresses:'''
== Download Image ==
<syntaxhighlight lang="bash">
from - https://drive.google.com/file/d/0B0EsZGPuNAPvVDlicGt1NUx0Y0E/view
tcprewrite --pnat=8.7.6.5/32:1.2.3.4/32 -i ./original.pcap -o ./rewritten.pcap
== Prepare ISO for install ==
</syntaxhighlight>
===Create High Sierra DMG Disk Image===
hdiutil create -o /tmp/Highsierra -size 7900m -volname highsierra -layout SPUD -fs HFS+J


=== Mount DMG Image to your macOS ===
== SSL/TLS Testing ==
hdiutil attach /tmp/Highsierra.dmg -noverify -mountpoint /Volumes/Highsierra


=== Create a High Sierra ISO image ===
<syntaxhighlight lang="bash">
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Highsierra
voipmonitor --config-file /etc/test.conf -k -v1,pcap_stat_period=1,_ssl,_tls,_ssldecode \
  -rpba:/tmp/keys.pcap@@/tmp/call.pcap \
  --json_config='[{"sipport":"8089"},{"ssl":"yes"},{"ssl_ipport":"192.168.0.1:8089"},{"ssl_sessionkey_udp":"yes"},{"ssl_sessionkey_udp_port":"1234"}]'
</syntaxhighlight>


=== Unmount Disk Image ===
For TLS details, see [[Tls]].
hdiutil detach /volumes/Install\ macOS\ High\ Sierra


=== Convert DMG to ISO ===
= Manager API =
hdiutil convert /tmp/Highsierra.dmg -format UDTO -o ~/Desktop/Highsierra


=== Rename and Move ISO Image to Desktop ===
'''For complete reference, see [[Manager_API]].'''
mv ~/Desktop/Highsierra.cdr ~/Desktop/Highsierra.iso


== Create new virtual Image ==
This section covers quick debug commands. For encryption setup and full command list, see the main article.
during preconfigure of new image set:
memmory 3-6GB
disk size 100GB
then edit it's settings and additionally modify:
system -> Motherboard -> Chipset: PIIX3
system -> Processor -> count (2), Enable PAE/NX
system -> Storage -> Attributes-> Optical drive->Sata port 1, for the newly created iso
display -> Video memory -> 128MB
display -> Graphics Controler -> VMSVGA


== Add the VirtualBox macOS Code to CMD ==
== Via Manager Port (5029) ==
cd "C:\Program Files\Oracle\VirtualBox\"
VBoxManage.exe modifyvm "Your VM Name" --cpuidset 00000001 000106e5 00100800 0098e3fd bfebfbff
VBoxManage setextradata "Your VM Name" "VBoxInternal/Devices/efi/0/Config/DmiSystemProduct" "iMac11,3"
VBoxManage setextradata "Your VM Name" "VBoxInternal/Devices/efi/0/Config/DmiSystemVersion" "1.0"
VBoxManage setextradata "Your VM Name" "VBoxInternal/Devices/efi/0/Config/DmiBoardProduct" "Iloveapple"
VBoxManage setextradata "Your VM Name" "VBoxInternal/Devices/smc/0/Config/DeviceKey" "ourhardworkbythesewordsguardedpleasedontsteal(c)AppleComputerInc"
VBoxManage setextradata "Your VM Name" "VBoxInternal/Devices/smc/0/Config/GetKeyFromRealSMC" 1


== Install macOS on virtulBox ==
<syntaxhighlight lang="bash">
#Open VirtualBox and turn on your High Sierra, then Open "Disk Utility".
# These require encryption disabled OR use socket file
#Format VirtualBox Virtual Disk with "Mac OS Extended". (GUID:Partition map)
echo 'listcalls' | nc 127.0.0.1 5029
#Now, you can install macOS High Sierra on new virtual disk with your ISO Image.
echo 'sniffer_stat' | nc 127.0.0.1 5029
#After your installation is completed, turn off your macOS High Sierra. Open VirtualBox, and remove High Sierra.iso file.
echo 'jemalloc_stat_full' | nc 127.0.0.1 5029
#Turn on your Virtual Machine. At UEFI Shell screen, boot with this commands:
echo 'sniffer_threads' | nc 127.0.0.1 5029
</syntaxhighlight>


>"fs1:\macOS Install Data\Locked Files\Boot Files\boot.efi"
{{Tip|For encrypted communication, use the GUI's <code>run.php send_manager_cmd</code> or Unix socket. See [[Manager_API#Usage Examples]].}}


== Via Server Port (60024) ==


== Start the High Sierra Virtual machine and Enjoy ==
Used in distributed deployments for probe management:


= Measurement =
<syntaxhighlight lang="bash">
== Memory speed ==
# List connected clients
echo '{"type_connection":"manager_command","command":"active"}' | nc 127.0.0.1 60024


sysbench memory --threads=2 run
# Send command to specific probe
echo '{"type_connection":"gui_command","sensor_id":1011,"command":"terminating"}' | nc 127.0.0.1 60024
</syntaxhighlight>


* should be over 5000 MiB/sec
= GUI Workarounds =


= SSL and keylogger =
== Disable Sensor Logs Popup ==
== How to test it in voipmonitor ==
./voipmonitor --config-file /etc/test.conf -k -v1,pcap_stat_period=1,_ssl,_tls,_ssldecode,ssl_sessionkey,dump_sip_line -rpba:/tmp/keys.pcap@@/tmp/call.pcap --json_config='[{"sipport":"8089"},{"ssl":"yes"},{"ssl_ipport":"192.168.0.1:8089"},{"ssl_sessionkey_udp":"yes"},{"ssl_sessionkey_udp_port":"1234"},{"ssl_sessionkey_udp_maxwait_ms":10000},{"interface":"lo"},{"spooldir":"/var/spool/voipmonitorTLS"}]'


== How to test it in wireshark/tshark ==
{{Note|There is no built-in GUI option to disable the sensor logs popup shown at admin login.}}


=== Get the keys from keyloger's dump ===
'''Option 1: Periodic SQL update'''
ngrep -I /tmp/keycapture.pcap |grep '^ ' |cut -d ' ' -f3- > /tmp/keys.txt
<syntaxhighlight lang="sql">
UPDATE voipmonitor.log_sensor SET confirmed = 1;
</syntaxhighlight>


=== Decrypt with tshark ===
'''Option 2: Database trigger (permanent)'''
tshark -r '/tmp/tlscall.pcap' -o 'tls.keylog_file: /tmp/keys.txt' -o 'tls.debug_file: /dev/stdout'
<syntaxhighlight lang="sql">
DELIMITER $$
CREATE TRIGGER before_insert_log_sensor
BEFORE INSERT ON log_sensor
FOR EACH ROW
BEGIN
    SET NEW.confirmed = 1;
END$$
DELIMITER ;
</syntaxhighlight>


=== Decrypt in wireshark ===
== IonCube Crash Fix (Ubuntu 22.04 + PHP 7.4) ==
In edit->preferences->protocol->SSL->pre-master secret log filename and choose the keys.txt
then find the client Hello HS packet, right click on it and follow stream - TLS


= Spooldir testing =
'''Symptom:''' ldap.so crash at login page (CVE-2024-8932).
When there are problems with cleaning the spooldir or spooldir size not respects the settings you can use following command to test
voipmonitor --config-file /etc/voipmonitor.conf -k -v1 --test-cleanspool-load all


= Manager API via server port =
'''Fix:'''
== get list of the connected clients ==
<syntaxhighlight lang="bash">
echo '{"type_connection":"manager_command","command":"active"}'|nc 127.0.0.1 60024
# Backup
== send terminating manager command to a probe ==
cd /usr/lib/php/20190902 && mkdir BKUP && cp -pv ldap.so* BKUP
echo '{"type_connection":"gui_command","sensor_id":1011,"command":"terminating"}'|nc 127.0.0.1 60024


= HA proxy =
# Download and extract fixed package
[[sample HAproxy configuration]]
wget https://pl.archive.ubuntu.com/ubuntu/pool/main/p/php7.4/php7.4-ldap_7.4.3-4ubuntu2.24_amd64.deb
ar x php7.4-ldap_7.4.3-4ubuntu2.24_amd64.deb


== High CPS config for voipmonitor with hugepages ==
# Install and restart
[[voipmonitor and hugepages]]
cp -v ./usr/lib/php/20190902/ldap.so /usr/lib/php/20190902/ldap.so
systemctl restart apache2
</syntaxhighlight>


= IOPS tests =
= Database Operations =
--rw can be randread,randwrite,randrw
  fio --name=rootTest --ioengine=libaio --rw=randwrite --bs=8k --numjobs=16 --size=1G --runtime=600s --time_based --ramp_time=15s --norandommap --filename=/root/testW.dat --output=/root/fio_db_write.txt


= Rocky 9=
== Rename MySQL Database ==
[[Rocky 9]]


= Email templates =
Generate RENAME TABLE commands:
common requests in supports [[common body of support emails]]
<syntaxhighlight lang="sql">
SELECT CONCAT('RENAME TABLE ',table_schema,'.',table_name,' TO NEW_DB.',table_name,';')
FROM information_schema.TABLES
WHERE table_schema LIKE 'OLD_DB';
</syntaxhighlight>
 
{{Warning|1=Foreign keys may cause issues during rename.}}
 
== Spooldir Testing ==
 
<syntaxhighlight lang="bash">
voipmonitor --config-file /etc/voipmonitor.conf -k -v1 --test-cleanspool-load all
</syntaxhighlight>
 
= Remote Support Access =
 
== VPN Connection Issues ==
 
When support staff cannot connect to client VPN (Fortinet, etc.):
 
# '''Cause:''' Support IP not whitelisted on client firewall
# '''Solution:''' Client must add support staff's public IP to their VPN/firewall whitelist
# '''Note:''' This is client-side network administration, not a VoIPmonitor issue
 
{{Note|1=Don't confuse VPN network access with FortiToken 2FA (GUI authentication).}}
 
= System Troubleshooting =
 
== TCP SACK (Buggy Kernels pre-2019/03) ==
 
<syntaxhighlight lang="bash">
echo "0" > /proc/sys/net/ipv4/tcp_sack
</syntaxhighlight>
 
== Memory Speed Test ==
 
<syntaxhighlight lang="bash">
sysbench memory --threads=2 run
# Should be >5000 MiB/sec
</syntaxhighlight>
 
= Additional Resources =
 
{| class="wikitable"
! Topic !! Link
|-
| HAProxy config || [[sample HAproxy configuration]]
|-
| Hugepages for high CPS || [[voipmonitor and hugepages]]
|-
| Manager API reference || [[Manager_API]]
|-
| Syslog status line || [[Syslog_Status_Line]]
|-
| Ribbon SBC 7k TLS || [[Ribbon7k monitoring profiles]]
|-
| Support email templates || [[common body of support emails]]
|-
| IPACCOUNT feature || [[ipaccount]]
|-
| DTLS decryption || [[DTLS]]
|-
| Rocky 9 installation || [[Rocky 9]]
|}
 
'''IOPS testing:'''
<syntaxhighlight lang="bash">
fio --name=rootTest --ioengine=libaio --rw=randwrite --bs=8k --numjobs=16 \
  --size=1G --runtime=600s --time_based --filename=/root/testW.dat
</syntaxhighlight>
 
 
 
= AI Summary for RAG =
 
'''Summary:''' Internal support documentation for VoIPmonitor team covering testing, debugging, and troubleshooting procedures. Key topics: (1) Testing configuration with <code>--json_config</code> to override settings without editing files; (2) Testing regexp, country assignment, and billing; (3) License management commands (<code>checkLicense</code>, cron updates); (4) Debugging tools including jemalloc for memory leaks, X88 mode for detailed allocation, thread monitoring via <code>sniffer_threads</code> command; (5) PCAP testing methods (basic upload, packetbuffer, IPFIX emulation, tcpreplay with L2 addition and IP rewriting); (6) SS7/Wireshark module compilation; (7) Manager API commands on ports 5029 and 60024; (8) GUI workarounds including sensor logs popup disable (database trigger solution); (9) IonCube ldap.so crash fix for Ubuntu 22.04 + PHP 7.4; (10) VPN access troubleshooting (IP whitelisting on client firewall).
 
'''Keywords:''' internal support, json_config, testing, regexp, country assignment, billing test, license, checkLicense, jemalloc, memory leak, X88, sniffer_threads, SS7, wireshark, IPFIX, tcpreplay, pcap testing, Manager API, IonCube, ldap.so, Ubuntu 22.04, VPN access, IP whitelisting, sensor logs popup, log_sensor, database trigger, tcp_sack, sysbench, memory speed
 
'''Key Questions:'''
* How to test configuration without modifying voipmonitor.conf?
* How to test regexp patterns or country assignment?
* How to check license channel usage?
* How to debug memory leaks using jemalloc?
* How to compile voipmonitor with jemalloc or SS7 support?
* How to generate jeprof PDF memory report?
* How to monitor thread load with sniffer_threads?
* How to test IPFIX or replay PCAPs?
* How to add layer 2 to PCAP for tcpreplay?
* How to disable sensor logs popup in GUI?
* How to fix IonCube ldap.so crash in Ubuntu 22.04?
* How to resolve VPN connection issues for remote support?
* How to disable TCP SACK on buggy kernels?
* How to test memory speed with sysbench?

Latest revision as of 23:55, 9 January 2026


⚠️ Warning: This documentation is for the internal support team. Use at your own risk and test on non-production servers first.

Quick Reference

Testing Configuration

Override Settings with json_config

Override config file and database settings without editing files: 

voipmonitor --config-file=/etc/voipmonitor.conf -k -v1 \
  --json_config='[{"id_sensor":"11"},{"interface":"lo"},{"natalias":"8.8.8.8 10.10.100.50"}]'

💡 Tip: Useful for quick testing of specific parameters. Options in json_config take precedence over config file and DB settings.

Regexp / Country / Billing Tests

Test Type Command
Regexp pattern voipmonitor --config-file=/etc/voipmonitor.conf -k -v1 --test-regexp '^800...[1-9][0-9]'
Country by IP voipmonitor --config-file=/etc/voipmonitor.conf -k -v1 --find-country-for-ip=102.140.68.113
Country by number voipmonitor --config-file=/etc/voipmonitor.conf -k -v1 --find-country-for-number 0034*12345
Billing test voipmonitor --config-file=/etc/voipmonitor.conf -k -v1 --test-billing test_data/billing

Billing test file format (CSV): 

# calldate,connect_duration,caller,called,sipcallerip,sipcalledip,[exp_price_op],[exp_price_cust]
2018-05-09 12:00,120,+4121353333,+41792826527,192.168.101.10,192.168.101.151,800,8

License Management

Task Command
Write channel stats to DB php /var/www/html/php/run.php saveCallStatistics
Check license details php /var/www/html/php/run.php checkLicense -v
Check max peak only php /var/www/html/php/run.php checkLicense -v | grep max_peak -A3 -B1
Get token from DB SELECT content FROM voipmonitor.system WHERE type='license token';
View license file cat /var/www/html/key.php

Auto-update license via cron (without processing alerts/reports): 

04 04 * * * root php /var/www/html/php/run.php runUpdateLicenseKey

Utility Scripts

Script Purpose Details
Parallel alerts Process alerts faster Enable in Settings → System Configuration → Advanced → Number of parallel tasks
Batch download Download >1000 audio files Bypasses GUI limit of 1000 CDRs
RAM control Prevent OOM killer Sets oom_adj_score for PHP threads
Probe backup Backup all probe configs Requires SSH access without password

Debugging

Charts Binary Crash

When dmesg or Apache log shows charts crash: 

charts-x86_64[7321]: segfault at 10 ip 0000000000412553...

Debug procedure: 

# Create debug folder
mkdir /tmp/vm_charts_parameters

# After GUI creates charts, test with saved arguments
/var/www/html/bin/charts-x86_64 -i /tmp/vm_charts_parameters/files

Memory Leak Detection (Jemalloc)

Compile Jemalloc

# Download from https://github.com/jemalloc/jemalloc
./autogen.sh
./configure --enable-prof
make && make install

Compile VoIPmonitor with Jemalloc

Edit config.h: 

#define HAVE_LIBTCMALLOC 0
#define HAVE_LIBJEMALLOC 1

Edit Makefile: 

# Change -O2 to -O0 (disable optimization)
LIBS = ${SHARED_LIBS} -ljemalloc

make clean && make -j8

Run with Jemalloc

Modify /etc/init.d/voipmonitor start section: 

LD_PRELOAD=/usr/local/lib/libjemalloc.so MALLOC_CONF='prof:true' /usr/local/src/voipmonitor --config-file $CONFIGFILE --pid-file $PIDFILE $ARGS

Generate Memory Report

# Install dependencies
apt install graphviz ghostscript  # or: yum install graphviz ghostscript

# Generate PDF report
echo 'jemalloc_stat_full' | nc 127.0.0.1 5029 > /tmp/je_prof
jeprof --show_bytes --pdf /usr/local/src/sniffer/voipmonitor /tmp/je_prof > je_prof.pdf

X88 Mode (Detailed Memory Debug)

For more detailed memory allocation info: 

cp -a /usr/src/voipmonitor-git /usr/src/sniffer-git-jemalloc-X88
LD_PRELOAD=/usr/local/lib/libjemalloc.so ./voipmonitor -k -v1 -c -X88
make clean && make

Run with extra verbose options: 

LD_PRELOAD=/usr/local/lib/libjemalloc.so MALLOC_CONF='prof:true' ./voipmonitor \
  --config-file=/etc/voipmonitor.conf \
  -v 1,force_log_sqlq,memory_stat_ex,memory_stat_ignore_limit=100000,heapsafe

See: X88-memoryConsumptionDebug

Thread Debugging

Method Usage
Log thread CPU Add -v1,threads_cpu_log to command line
List threads nc 127.0.0.1 5029
Extended info Set sniffer_threads_ext=yes in config (requires compile with SNIFFER_THREADS_EXT true)

sniffer_threads options:

  • no_sort - don't sort by load
  • only_traffic - only threads with traffic
  • all - include unloaded threads
  • line - simple line output

SS7 Module Compilation

Requires Wireshark 3.2.

Edit config.h: 

#define HAVE_LIBWIRESHARK 1
#define LIBWIRESHARK_VERSION 30200

Edit Makefile: 

INCLUDE += -I/usr/include/wireshark
SHARED_LIBS += -lwiretap -lwireshark -lwsutil
# Change -O2 to -O0

./configure && make clean && make ss7

PCAP Testing

Basic Methods

Method Command
Basic upload voipmonitor --config-file=/etc/voipmonitor.conf -r /tmp/file.pcap
Via packetbuffer (fast) voipmonitor --config-file=/etc/voipmonitor.conf -rpbsa9: /tmp/file.pcap
Via packetbuffer (original time) voipmonitor --config-file=/etc/voipmonitor.conf -rpb: /tmp/file.pcap

IPFIX Testing

Receiver instance: 

ipfix = yes
ipfix_bind_ip = 0.0.0.0
ipfix_bind_port = 12345

Sender instance: 

voipmonitor --config-file=/etc/voipmonitor.conf -k -v1 \
  --ipfix-client-emulation='/tmp/ipfix.pcap;1.2.3.4;8.8.8.8;127.0.0.1;12345'
# Parameters: pcap_file;client_ip;server_ip;dest_ip;dest_port

IPFIX PCAP Download Behavior

Key fact: IPFIX data is internally converted to packet format for processing. This means:

  • PCAP files CAN be downloaded from the GUI for IPFIX-sourced calls
  • SIP signaling is reconstructed from the IPFIX data
  • RTP streams are NOT included in the PCAP - only QoS metrics from IPFIX data are available, not actual audio packets

When downloading PCAP from IPFIX calls with TLS, TCP sequence numbers may be set to 0 causing Wireshark to display incorrectly. Disable TCP sequence analysis in Wireshark preferences to view all packets.

Tcpreplay

Enable in /etc/init.d/voipmonitor: 

ARGS="-v 1,dump_call_flags,tcpreplay"

Add Layer 2 if missing (for captures done on "any" interface): 

tcprewrite --dlt=enet -i /tmp/x.pcap -o /tmp/x_enet.pcap
tcprewrite --enet-dmac=00:55:22:AF:C6:37 --enet-smac=00:44:66:FC:29:AF \
  --infile=/tmp/x_enet.pcap --outfile=/tmp/x_l2.pcap

Rewrite IP addresses: 

tcprewrite --pnat=8.7.6.5/32:1.2.3.4/32 -i ./original.pcap -o ./rewritten.pcap

SSL/TLS Testing

voipmonitor --config-file /etc/test.conf -k -v1,pcap_stat_period=1,_ssl,_tls,_ssldecode \
  -rpba:/tmp/keys.pcap@@/tmp/call.pcap \
  --json_config='[{"sipport":"8089"},{"ssl":"yes"},{"ssl_ipport":"192.168.0.1:8089"},{"ssl_sessionkey_udp":"yes"},{"ssl_sessionkey_udp_port":"1234"}]'

For TLS details, see Tls.

Manager API

For complete reference, see Manager_API.

This section covers quick debug commands. For encryption setup and full command list, see the main article.

Via Manager Port (5029)

# These require encryption disabled OR use socket file
echo 'listcalls' | nc 127.0.0.1 5029
echo 'sniffer_stat' | nc 127.0.0.1 5029
echo 'jemalloc_stat_full' | nc 127.0.0.1 5029
echo 'sniffer_threads' | nc 127.0.0.1 5029

💡 Tip: For encrypted communication, use the GUI's run.php send_manager_cmd or Unix socket. See Manager_API#Usage Examples.

Via Server Port (60024)

Used in distributed deployments for probe management: 

# List connected clients
echo '{"type_connection":"manager_command","command":"active"}' | nc 127.0.0.1 60024

# Send command to specific probe
echo '{"type_connection":"gui_command","sensor_id":1011,"command":"terminating"}' | nc 127.0.0.1 60024

GUI Workarounds

Disable Sensor Logs Popup

ℹ️ Note: There is no built-in GUI option to disable the sensor logs popup shown at admin login.

Option 1: Periodic SQL update 

UPDATE voipmonitor.log_sensor SET confirmed = 1;

Option 2: Database trigger (permanent) 

DELIMITER $$
CREATE TRIGGER before_insert_log_sensor
BEFORE INSERT ON log_sensor
FOR EACH ROW
BEGIN
    SET NEW.confirmed = 1;
END$$
DELIMITER ;

IonCube Crash Fix (Ubuntu 22.04 + PHP 7.4)

Symptom: ldap.so crash at login page (CVE-2024-8932).

Fix: 

# Backup
cd /usr/lib/php/20190902 && mkdir BKUP && cp -pv ldap.so* BKUP

# Download and extract fixed package
wget https://pl.archive.ubuntu.com/ubuntu/pool/main/p/php7.4/php7.4-ldap_7.4.3-4ubuntu2.24_amd64.deb
ar x php7.4-ldap_7.4.3-4ubuntu2.24_amd64.deb

# Install and restart
cp -v ./usr/lib/php/20190902/ldap.so /usr/lib/php/20190902/ldap.so
systemctl restart apache2

Database Operations

Rename MySQL Database

Generate RENAME TABLE commands: 

SELECT CONCAT('RENAME TABLE ',table_schema,'.',table_name,' TO NEW_DB.',table_name,';')
FROM information_schema.TABLES
WHERE table_schema LIKE 'OLD_DB';

⚠️ Warning: Foreign keys may cause issues during rename.

Spooldir Testing

voipmonitor --config-file /etc/voipmonitor.conf -k -v1 --test-cleanspool-load all

Remote Support Access

VPN Connection Issues

When support staff cannot connect to client VPN (Fortinet, etc.):

  1. Cause: Support IP not whitelisted on client firewall
  2. Solution: Client must add support staff's public IP to their VPN/firewall whitelist
  3. Note: This is client-side network administration, not a VoIPmonitor issue

ℹ️ Note: Don't confuse VPN network access with FortiToken 2FA (GUI authentication).

System Troubleshooting

TCP SACK (Buggy Kernels pre-2019/03)

echo "0" > /proc/sys/net/ipv4/tcp_sack

Memory Speed Test

sysbench memory --threads=2 run
# Should be >5000 MiB/sec

Additional Resources

Topic Link
HAProxy config sample HAproxy configuration
Hugepages for high CPS voipmonitor and hugepages
Manager API reference Manager_API
Syslog status line Syslog_Status_Line
Ribbon SBC 7k TLS Ribbon7k monitoring profiles
Support email templates common body of support emails
IPACCOUNT feature ipaccount
DTLS decryption DTLS
Rocky 9 installation Rocky 9

IOPS testing: 

fio --name=rootTest --ioengine=libaio --rw=randwrite --bs=8k --numjobs=16 \
  --size=1G --runtime=600s --time_based --filename=/root/testW.dat


AI Summary for RAG

Summary: Internal support documentation for VoIPmonitor team covering testing, debugging, and troubleshooting procedures. Key topics: (1) Testing configuration with --json_config to override settings without editing files; (2) Testing regexp, country assignment, and billing; (3) License management commands (checkLicense, cron updates); (4) Debugging tools including jemalloc for memory leaks, X88 mode for detailed allocation, thread monitoring via sniffer_threads command; (5) PCAP testing methods (basic upload, packetbuffer, IPFIX emulation, tcpreplay with L2 addition and IP rewriting); (6) SS7/Wireshark module compilation; (7) Manager API commands on ports 5029 and 60024; (8) GUI workarounds including sensor logs popup disable (database trigger solution); (9) IonCube ldap.so crash fix for Ubuntu 22.04 + PHP 7.4; (10) VPN access troubleshooting (IP whitelisting on client firewall).

Keywords: internal support, json_config, testing, regexp, country assignment, billing test, license, checkLicense, jemalloc, memory leak, X88, sniffer_threads, SS7, wireshark, IPFIX, tcpreplay, pcap testing, Manager API, IonCube, ldap.so, Ubuntu 22.04, VPN access, IP whitelisting, sensor logs popup, log_sensor, database trigger, tcp_sack, sysbench, memory speed

Key Questions:

  • How to test configuration without modifying voipmonitor.conf?
  • How to test regexp patterns or country assignment?
  • How to check license channel usage?
  • How to debug memory leaks using jemalloc?
  • How to compile voipmonitor with jemalloc or SS7 support?
  • How to generate jeprof PDF memory report?
  • How to monitor thread load with sniffer_threads?
  • How to test IPFIX or replay PCAPs?
  • How to add layer 2 to PCAP for tcpreplay?
  • How to disable sensor logs popup in GUI?
  • How to fix IonCube ldap.so crash in Ubuntu 22.04?
  • How to resolve VPN connection issues for remote support?
  • How to disable TCP SACK on buggy kernels?
  • How to test memory speed with sysbench?
Retrieved from "https://www.voipmonitor.org/doc/index.php?title=Internal_support_hints&oldid=10474"