[Kamailio-Users] add_path_received and OBP problems

[Florian Meister]

> How do you route in-dialog messages? LB and proxy/registrar should use
> record-route on initial request to stay in the proxy-chain. LB and
> proxy/registrar should route in-dialog requests with loose_route() and
> t_relay().
> 
> Also, on the LB you have to do the NAT traversal for the clients: i.e.
> fix_nated_contact() on messages from the client. If the LB is
> multihomed
> and uses double-record-routing I think you could the same mechanism
> like
> path (adding "received" to the record-route header) too.

I already found my problem. It was as you mentioned a NAT problem. In the preloaded-route (which is added by the proxy for path support) the nat-flag is not set. In the response I check for the existence of the nat flag for diciding to do fix_nated_contact. Since it does not exist, I have the wrong contact in the response.

I am checking now for both ";nat=yes" and "received=", because if there is a received header it is a natted device.

Best regards, 

Florian