Hello,

I could not spot a difference in method from r-uri and cseq header -- the error message is printed from sanity module, you can disable the cseq method check, see:

* http://kamailio.org/docs/modules/devel/modules/sanity.html

But it will be important to see why is failing, can you add an xlog line in config like:

xlog("=== method is [$rm] and cseq [$hdr(CSeq)]\n");

and send it over here? Maybe then we can spot what's wrong there.

Cheers, Daniel

On 2/27/12 2:54 PM, David wrote:

Hello,

I am trying to connect to a kamailio server using a Cisco SPA504G phone using TCP instead of TCP. When in UDP, it works fine, but in TCP I get errors relating to CSEQ.

I included the trace taking with ngrep after the email.

I don't understand the CSeq error. I had a look at RFC3261, it says that the CSEQ number has to increase and that's what it has done. Can anyone tell me where the errorlies ?

I tried changeing the check sanity to not check that CSeq is valid, but it screws up authentication as it mis detects the method type.

Please advise,

David

interface: eth0 (SERVERIP/255.255.255.128) filter: (ip or ip6) and ( port 5060 and host 206.248.130.233

#### T 206.248.130.233:5075 -> SERVERIP:5060 [AP] REGISTER sip:SERVERNAME.TLD SIP/2.0. Via: SIP/2.0/TCP 192.168.1.225:5075;branch=z9hG4bK-b03863b5;rport. From: "104 Zone T" sip:testzone.104@SERVERNAME.TLD;tag=3fa2fa4d354b4261o0. To: "104 Zone T" sip:testzone.104@SERVERNAME.TLD. Call-ID: 4c3756fb-9b03d67a@192.168.1.225. CSeq: 50446 REGISTER. Max-Forwards: 70. Contact: "104 Zone T" sip:testzone.104@192.168.1.225:5075;transport=tcp;expires=3600. Warning: 399 spa "STUN Server Not Reachable". User-Agent: Cisco/SPA504G-7.4.9c. Content-Length: 0. Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER, UPDATE. Supported: replaces. .

## T SERVERIP:5060 -> 206.248.130.233:5075 [AP] SIP/2.0 401 Unauthorized. Via: SIP/2.0/TCP 192.168.1.225:5075;received=206.248.130.233;branch=z9hG4bK-b03863b5;rport=5075. From: "104 Zone T" sip:testzone.104@SERVERNAME.TLD;tag=3fa2fa4d354b4261o0. To: "104 Zone T" sip:testzone.104@SERVERNAME.TLD;tag=a889ade7c63805944f01d11bb71a916b.6a29. Call-ID: 4c3756fb-9b03d67a@192.168.1.225. CSeq: 50446 REGISTER. WWW-Authenticate: Digest realm="SERVERNAME.TLD", nonce="4f4b87c31ea308c5fdf54c90cf2b30a400fa97a7". Server: OmniVigil 5.0a. Content-Length: 0. .

## T 206.248.130.233:5075 -> SERVERIP:5060 [AP] REGISTER sip:SERVERNAME.TLD SIP/2.0. Via: SIP/2.0/TCP 192.168.1.225:5075;branch=z9hG4bK-dcfc09e;rport. From: "104 Zone T" sip:testzone.104@SERVERNAME.TLD;tag=3fa2fa4d354b4261o0. To: "104 Zone T" sip:testzone.104@SERVERNAME.TLD. Call-ID: 4c3756fb-9b03d67a@192.168.1.225. CSeq: 50447 REGISTER. Max-Forwards: 70. Authorization: Digest username="testzone.104",realm="SERVERNAME.TLD",nonce="4f4b87c31ea308c5fdf54c90cf2b30a400fa97a7",uri="sip:SERVERNAME.TLD",algorithm=MD5,response="77ddf2a1baafd33ed0c675fdc074bc03". Contact: "104 Zone T" sip:testzone.104@206.248.130.233:5075;transport=tcp;expires=3600. Warning: 399 spa "STUN Server Not Reachable". User-Agent: Cisco/SPA504G-7.4.9c. Content-Length: 0. Allow: ACK, BYE, CANCEL, INFO, INVITE, NOTIFY, OPTIONS, REFER, UPDATE. Supported: replaces. .

## T SERVERIP:5060 -> 206.248.130.233:5075 [AP] SIP/2.0 400 CSeq method does not match request method. Via: SIP/2.0/TCP 192.168.1.225:5075;branch=z9hG4bK-dcfc09e;rport=5075;received=206.248.130.233. From: "104 Zone T" sip:testzone.104@SERVERNAME.TLD;tag=3fa2fa4d354b4261o0. To: "104 Zone T" sip:testzone.104@SERVERNAME.TLD;tag=1feca66ab82b1f32a901c4cd8a4b7a05.e8e6. Call-ID: 4c3756fb-9b03d67a@192.168.1.225. CSeq: 50447 REGISTER. Server: kamailio (3.1.5 (x86_64/linux)). Content-Length: 0. .

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