February 28th, 2013 by Gia

Environment :

  • CentOS 6.2 64bit
  • Asterisk 1.8.20.1
  • Asterisk machine (VM) behind NAT (Port Forwading)
  • Public IP : 114.13.10.85
  • Asterisk local IP : 10.10.10.1

CLI Log :

[Feb 28 09:28:22] WARNING[13394]: chan_sip.c:3974 retrans_pkt: Retransmission timeout reached on transmission ce69b44af71ba023NjgzZjFiNTY1MDc5MGJhNzA0ZjBjN2RiZjVlMzUzOTc. for seqno 1 (Critical Response) -- See https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions
Packet timed out after 16576ms with no response
[Feb 28 09:28:35] WARNING[13394]: chan_sip.c:3974 retrans_pkt: Retransmission timeout reached on transmission aa68952b465def6eNjgzZjFiNTY1MDc5MGJhNzA0ZjBjN2RiZjVlMzUzOTc. for seqno 1 (Critical Response) -- See https://wiki.asterisk.org/wiki/display/AST/SIP+Retransmissions
Packet timed out after 16575ms with no response

Step to fix problem :

  • Change sip.conf (/etc/asterisk/) configuration, add this line :
localnet = 10.10.10.0/255.255.255.0
externaddr = 114.13.10.85
  • Reload Asterisk configuration
[root@ivr ~]# asterisk -vvvvvr
ivr*CLI> reload

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