Thanks all of your for reply. Here is the output of command:


root@li496-23:~# lsmod | grep -i sip

root@li496-23:~#

This command is giving blank output.

This is linnode server. So the zcat /proc/config.gz command reveals the kernel loaded modules.
You can see complete output at pastebin:

http://pastebin.com/a0iqpc4D.

Thanks in advance

Vijay Th.





On Monday 06 August 2012 08:26 PM, sr-users-requ...@lists.sip-router.org wrote:
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Today's Topics:

    1. Re: Kernel Droping SIP packet (Richard Fuchs)
    2. Re: Kernel Droping SIP packet (Alex Balashov)
    3. Re: Kernel Droping SIP packet (Konstantin M.)
    4. Re: Kernel Droping SIP packet (Alex Balashov)


----------------------------------------------------------------------

Message: 1
Date: Mon, 06 Aug 2012 09:01:03 -0400
From: Richard Fuchs <rfu...@sipwise.com>
Subject: Re: [SR-Users] Kernel Droping SIP packet
To: sr-users@lists.sip-router.org
Message-ID: <501fc00f.6000...@sipwise.com>
Content-Type: text/plain; charset="iso-8859-1"

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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Message: 2
Date: Mon, 06 Aug 2012 08:42:57 -0400
From: Alex Balashov <abalas...@evaristesys.com>
Subject: Re: [SR-Users] Kernel Droping SIP packet
To: sr-users@lists.sip-router.org
Message-ID: <turqvr4fgiqrutc5pk4nan43.1344256977...@email.android.com>
Content-Type: text/plain; charset="utf-8"

Can you paste this output too??

lsmod | grep -i sip




-- 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/Vijay Thakur <vijay.tha...@loopmethods.com> 
wrote:Thanks for prompt reply.? Here is the out put if command iptables -L -n:

Chain INPUT (policy ACCEPT)
target???? prot opt source?????????????? destination????????

Chain FORWARD (policy ACCEPT)
target???? prot opt source?????????????? destination????????

Chain OUTPUT (policy ACCEPT)
target???? prot opt source?????????????? destination??

Thanks for prompt reply. This is a Ubuntu 10.04 Kamailio 3.1 Server.


Vijay TH

-==============================================================================

  Date: Mon, 06 Aug 2012 06:35:04 -0400
From: Alex Balashov <abalas...@evaristesys.com>
Subject: Re: [SR-Users] Kernel Droping SIP packet
To: sr-users@lists.sip-router.org
Message-ID: <17t1fd0fbly84yy2vuy8qlcp.1344249304...@email.android.com>
Content-Type: text/plain; charset="utf-8"

You might consider pasting the actual output of: iptables -L -n

This lists the actual rules straight from netfilter at runtime. I wouldn't 
worry too much about what some distro-specific config file or script says. Real 
truth comes from iptables itself.?




-- 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/Vijay Thakur <vijay.tha...@loopmethods.com> 
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)

I have not implemented any firewall. You can check the out put of my
iptables : http://pastebin.com/i3zUfVeb
The SIP server is hosted at linnode.

With thanks in advance. Sorry dual posting.

Vijay TH


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------------------------------

Message: 3
Date: Mon, 6 Aug 2012 16:53:36 +0300
From: "Konstantin M." <evilz...@gmail.com>
Subject: Re: [SR-Users] Kernel Droping SIP packet
To: "SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) -
        Users   Mailing List" <sr-users@lists.sip-router.org>
Message-ID:
        <caeyttzerjrk0lks+7twntmp_5r5vn708sv+um+u3vlbgj59...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

rmmod nf_conntrack_sip

2012/8/6 Alex Balashov <abalas...@evaristesys.com>

Can you paste this output too?

lsmod | grep -i sip




-- 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/

Vijay Thakur <vijay.tha...@loopmethods.com> wrote:
Thanks for prompt reply.  Here is the out put if command iptables -L -n:

*Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination

Thanks for prompt reply. This is a Ubuntu 10.04 Kamailio 3.1 Server.


Vijay TH


-==============================================================================

*

Date: Mon, 06 Aug 2012 06:35:04 -0400
From: Alex Balashov <abalas...@evaristesys.com> <abalas...@evaristesys.com>
Subject: Re: [SR-Users] Kernel Droping SIP packet
To: sr-users@lists.sip-router.org
Message-ID: <17t1fd0fbly84yy2vuy8qlcp.1344249304...@email.android.com> 
<17t1fd0fbly84yy2vuy8qlcp.1344249304...@email.android.com>
Content-Type: text/plain; charset="utf-8"

You might consider pasting the actual output of: iptables -L -n

This lists the actual rules straight from netfilter at runtime. I wouldn't 
worry too much about what some distro-specific config file or script says. Real 
truth comes from iptables itself.?




-- 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/Vijay Thakur <vijay.tha...@loopmethods.com> 
<vijay.tha...@loopmethods.com> 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)

I have not implemented any firewall. You can check the out put of my
iptables : http://pastebin.com/i3zUfVeb

The SIP server is hosted at linnode.

With thanks in advance. Sorry dual posting.

Vijay TH


*
*

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------------------------------

Message: 4
Date: Mon, 06 Aug 2012 09:04:04 -0400
From: Alex Balashov <abalas...@evaristesys.com>
Subject: Re: [SR-Users] Kernel Droping SIP packet
To: sr-users@lists.sip-router.org
Message-ID: <om9cr6896brukhcdg091wk1n.1344258244...@email.android.com>
Content-Type: text/plain; charset="utf-8"

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 <rfu...@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


_______________________________________________
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
sr-users@lists.sip-router.org
http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
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End of sr-users Digest, Vol 87, Issue 18
****************************************


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Best Regards,

Vijay Thakur
(Assistant Manager - Networks)
Mobile   : +91 8744018065
Mail     : vijay.tha...@loopmethods.com

Loop IT Methods Private Limited
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