In other words, the simplified configuration may be as the following: # Save original user name (the called phone number). avp_printf("$orig_called_num", "$rU"); if (load_gws()) { if (next_gw()) { if (lookup("location")) { avp_pushto("$ruri/username", "$orig_called_num"); t_on_failure("2"); route(x); # NAT and other usual staff there exit; } else { xlog("L_INFO", "I have to think what to do in this situation.\n"); sl_send_reply("404", "User Not Found"); } } } failure_route[2] { if (method=="INVITE" && t_check_status("408|500|503")) { if (!next_gw()) { t_reply("503", "Service not available, no more gateways"); } else { if (!lookup("location")) { xlog("L_INFO", "I have to think what to do in this situation.\n"); t_reply("503", "Service not available, no more gateways"); exit; }; t_on_failure("2"); t_on_branch("2"); t_relay(); } } } branch_route[2] { avp_pushto("$ruri/username", "$orig_called_num"); } Am I correct? Actually I don't know what to do if one of the gateways is off-line (lookup() failed). Best regards, Leonid Fainshtein -----Original Message----- From: Bogdan-Andrei Iancu [mailto:bogdan@voice-system.ro] Sent: Tuesday, November 08, 2005 5:30 PM To: Leonid Fainshtein Cc: users(a)openser.org Subject: Re: [Users] Routing to NATed gateways Hi Leonid, the scenario you are probing might be already doable. Set in the LCR table some IP addresses which will be used as aliases: private addresses in 10.10.x.x class for example. Then register this IPs in usrloc pointing to the real GWs address. So you can do lcr (next_gw) and then lookup. for this to work, lcr must operate on RURI and not on DST_URI (not sure

how exactly is working). regards, bogdan Leonid Fainshtein wrote: >Hi, >I'd like to use OpenSER for routing calls to NATed gateways. I also >want to support the LCR feature. Unfortunately, the current LCR >module > >

>doesn't support NAT. I mean that the gateway IP addresses must be >defined explicitly in the "gtw" table. Now I'm looking for a way to >force OpenSer to use information from the "location" table. >I want to write a module that will have the similar functionality >like > >

>the current LCR module has but resolving procedure will be more >complicated (not based on prefix and From only). The module should >build avp list where each gateway will have symbolic user name. For >example, g1, g2 etc. The gateways will also be registered on the >proxy > >

script.