I have a customer that is having intermittent problems with one way voice. Its
definitely a firewall problem as there are heaps of packet drops being reported
when it fails:
Oct 9 17:29:53 IPCLink user.info kernel: AIF:UNPRIV UDP packet: IN=eth0 OUT=
MAC=00:0d:b9:29:51:58:00:22:6b:aa:3e:bc:08:00 SRC=17.173.254.223
DST=124.168.209.154 LEN=44 TOS=0x08 PREC=0x20 TTL=43 ID=0 DF PROTO=UDP
SPT=16387 DPT=16403 LEN=24
He has a DMZ configured with a number of ports forwarded. The 'VOIP UDP ports'
param on the firewall page holds is 16384:16415 so this should be fine.
Directmedia = no so there should be no reinvites with all traffic going through
the Astlinux box.
Could anyone give me some hints where to start troubleshooting.
Regards
Michael Knill
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