Since build 5.2.801, WCS is running from 'flashphoner' user for security reasons. However, in this case, if WCS is launched manually from command line

cd /usr/local/FlashphonerWebCallServer/bin
sudo ./webcallserver start

TCP ports from range 0-1000 cannot be listened because they are not available for non-root users. Therefore, if WCS is launched manually, the following parameters should be changed to use TCP ports from range 1001-65535

• flash_policy.port
• hls.http.port
• hls.https.port
• http.port
• https.port
• rtmp.port
• rtsp.port
• ws.port
• wss.port