Hi all, 

I’m having some issues with ACK’s.

Specifically, when an ACK reaches Kamailio from either Asterisk or an endpoint, 
Kamailio is adding a second Via header - which isn’t valid as per RFC 3261 
(17.1.1.3);

        “The ACK MUST contain a single Via header field, and this MUST be equal 
to the top Via header field of the original request."

Endpoints are registered with Kamailio but INVITES are routed via Asterisk for 
dial plan and media reasons.

I’m running fairly bog-standard Kamailio and Asterisk installs.

I’ve attached a sample PCAP for if anyone has any suggestions.

Thanks.
Dan

Attachment: kam2.pcapng
Description: Binary data

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