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If you found some error in WCS operation and this error can be reliably reproduced on your server, you can prepare an error report as described below:

Collect debug logs and traffic dump

1. Enable logging of debug information by adding to the /usr/local/FlashphonerWebCallServer/conf/ settings file this line:


2. Restart WCS with the command:

sudo systemctl restart webcallserver

3. Run traffic pcap-dump using the command

sudo tcpdump -i any -s 0 -B 10240 -w log.pcap

4. Reproduce the error you experience

5. Stop traffic dumping by pressing Ctrl+C in the window of the temrinal where tcpdump was started.

Getting logs manually

1. Go to the location of the today's logs, for example

cd /usr/local/FlashphonerWebCallServer/logs/client_logs/2018-04-19

2. List all logs to the screen and sort by the modified date

ls -lt

Sample result:

├── 13i19gto2ob34utrfs6v2er1it-11-11-11
│ ├──
│ └── flashphoner.log
├── 7g2hq7ah5sda3r108917v15k4c-11-10-46
│ ├──
│ ├── flashphoner.log
│ └── flashphoner.log.2018-04-19-11

13i19gto2ob34utrfs6v2er1it-11-11-11 - is a directory containing the debug log for the first client connection
7g2hq7ah5sda3r108917v15k4c-11-10-46 - is a directory containing the debug log for the second client connection

Getting logs with script

Since build 5.2.241, it is possible to get collected logs with the following commands

cd /usr/local/FlashphonerWebCallServer/tools
sudo ./ --sysinfo --conf --tar

Script gets current logs and displays the result:

Scheduled report:

* logs
* netstat
* lsof
* pmap
* jstack
* sysinfo
* conf
* tar


[DONE] logs
[DONE] netstat
[DONE] lsof
[DONE] pmap
[DONE] jstack
[DONE] sysinfo
[DONE] conf
[DONE] tar
Report complete in 15 seconds. Check /usr/local/FlashphonerWebCallServer/report/report-2019-07-17-10-28-35

In this example, collected logs archive is here:


Preparing an error report

An error report must include:

  • Debug logs
  • File /usr/local/FlashphonerWebCallServer/logs/server_logs/flashphoner.log
  • Directory /usr/local/FlashphonerWebCallServer/conf
  • The result of executing the ifconfig command on your server
  • The result of executing the iptables -L  command on your server

or execution result archive.

An error report must also include traffic dump collected

Sending the report

Send the error report to the e-mail address of the technical support: If you have created a topic on the Flashphoner technical support forum, include the link to this topic to the e-mail.