It's certainly acceptable: RFC3261: Header field where proxy ACK BYE CAN INV OPT REG Contact 2xx - - - m o o i.e. mandatory in 200 reply to invite but *optional* for 200 reply to register. I don't know whether currently there's any way to disable it though. Looking through the source quickly I don't think it's currently possible, but one of the core developers would be able to give a better answer. sofia_reg.c:1452 nua_respond(nh, SIP_200_OK, SIPTAG_CONTACT(sip->sip_contact), sofia_reg.c:1453 TAG_IF(path_val, SIPTAG_PATH_STR(path_val)), NUTAG_WITH_THIS(nua), SIPTAG_DATE_STR(date), TAG_END()); This seems to be where the response is sent, but the contact header is always sent - it's not conditional on anything. Out of interest, what makes you think that it's the contact header that's the problem? Can you configure your client to send an ip&port in the contact header instead of *, perhaps that would work better? -Steve On 8 November 2010 12:35, Kane, Michael (mkane02) <mkane02@harris.com> wrote:

Hi, I've got an issue with the way FreeSwitch is currently handling (un)Register requests.

When my SIP client performs a registration to remove all its binding by using a Contact header with a value of "*", FS generates a corresponding 200 / OK response with a Contact header with a value of "*".  My current SIP client does not like a Contact header being included the 200 / OK response in this particular scenario and flags a failure.  Is there any way to configure FreeSwitch (or its embedded Sofia stack) to prevent it from adding a Contact header in this particular scenario?

Thanks, Mike

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