Ah, you short-circuited where I was going with this. Couldn't remember the name of the module.

Yep, Vijay. What Richard said.

-- Alex

-- Sent from my Samsung mobile, and thus lacking in the refinement one might expect from a proper keyboard.

Alex Balashov - Principal Evariste Systems LLC 235 E Ponce de Leon Ave Suite 106 Decatur, GA 30030 Tel: +1-678-954-0670 Web: http://www.evaristesys.com/Richard Fuchs rfuchs@sipwise.com wrote:On 08/06/12 06:08, Vijay Thakur wrote:

Hi all,

I have configure Kamailio 3.1.5 Server. All things are working fine. When i make a call from Soft phone (X-Lite) to iphone, all is working fine. But in other case call from iphone to Softphone is not working, even not ringing. During checking the logs i am getting the error:

Aug  3 04:36:09 localhost kernel: nf_ct_sip: dropping packetIN=eth0 OUT= MAC=f2:3c:91:ae:92:36:c8:4c:75:f5:c4:ff:08:00 SRC=122.xxx.xxx.77 DST=xx.116.xx.23 LEN=1482 TOS=0x00 PREC=0x00 TTL=51 ID=50183 DF PROTO=TCP SPT=15587 DPT=5060 SEQ=3285635734 ACK=3113844065 WINDOW=5763 RES=0x00 ACK URGP=0 OPT (0101080A000E20610932B25A)

This is coming from nf_conntrack_sip, which is a netfilter connection tracking kernel module for SIP. I've never used it, but judging from what Google brings up, it seems to be very buggy. You should be able to just unload it by issuing "rmmod nf_conntrack_sip". If that doesn't work and/or if you want to keep it from auto-loading, you can blacklist it in /etc/modprobe.d/ and then reboot.

HTH

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