[OpenSER-Users] NAT question

Hello all, I need some advice from all you NAT experts. Assume that we have two OpenSER proxies serving two different domains and they both use nathelper. Also assume that their configuration is identical and looks roughly like: route { ... record_route(); if (nat_uac_test("23")) { if (method!="REGISTER" && !is_present_hf("Record-Route")) { fix_nated_contact(); } } t_on_reply("1"); } onreply_route[1] { if (nat_uac_test("23")) { fix_nated_contact(); }; } clientA and clientB are both behind NAT. clientA@domainA sends an INVITE to clientB@domainB through proxyA: clientA@domainA -----> ProxyA -----> ProxyB ------> clientB@domainB ProxyA detects that clientA is behind NAT and fixes the contact. ProxyB finds the Record-Route header, so it does not fix the contact. My question is about how to handle the 200 OK. With this configuration both proxies detect that clientB is behind NAT and the contact gets fixed twice. Is there a way to avoid this? thank you George Disclaimer The information in this e-mail and any attachments is confidential. It is intended solely for the attention and use of the named addressee(s). If you are not the intended recipient, or person responsible for delivering this information to the intended recipient, please notify the sender immediately. Unless you are the intended recipient or his/her representative you are not authorized to, and must not, read, copy, distribute, use or retain this message or any part of it. E-mail transmission cannot be guaranteed to be secure or error-free as information could be intercepted, corrupted, lost, destroyed, arrive late or incomplete, or contain viruses.