Thanks Andrew
well, the RURI of remote ACK has proxy IP address 10.200.70.100 so proxy thinks that previous hop was a strict router.
Aha, that makes sense. But why would that make Kamailio apply strict routing?
I can't think of any workaround that would not be an ugly hack at the moment, though.
I thought encode_contact() and decode() contact were designed exactly for this? Except I can't get them to work so I believe you!
Richard