On 20/02/2019 06.53, Prabhat Kumar wrote:
I am getiing this error in syslog 

Feb 20 11:48:58 ip-10-0-0-X systemd[1]: Started Cleanup of Temporary Directories.
Feb 20 11:49:39 ip-10-0-0-X systemd[1]: Stopped NGCP RTP/media Proxy Daemon.
Feb 20 11:49:39 ip-10-0-0-X systemd[1]: Starting NGCP RTP/media Proxy Daemon...
Feb 20 11:49:39 ip-10-0-0-X kernel: [  943.077424] Registering xt_RTPENGINE module - version 6.5.0.0+0~mr6.5.0.0
Feb 20 11:49:39 ip-10-0-0-X systemd[1]: Started NGCP RTP/media Proxy Daemon.
Feb 20 11:49:39 ip-10-0-0-X rtpengine[2122]: [1550663379.862848] CRIT: Fatal error: Missing option --interface
Feb 20 11:49:39 ip-10-0-0-X systemd[1]: ngcp-rtpengine-daemon.service: Main process exited, code=exited, status=255/n/a
Feb 20 11:49:40 ip-10-0-0-X systemd[1]: ngcp-rtpengine-daemon.service: Unit entered failed state.
Feb 20 11:49:40 ip-10-0-0-X systemd[1]: ngcp-rtpengine-daemon.service: Failed with result 'exit-code'.
Feb 20 11:49:40 ip-10-0-0-X kernel: [  944.145301] Unregistering xt_RTPENGINE module

          
How can i correct it?

By setting up your config file correctly, in particular the IP/interface config.

Cheers