I've been thinking about it yesterday again, and when you take in consideration the whole concept of the Service-Route header (at least in an IMS architecture), it makes sense. During a registration on IMS 1. the UA send the initial register to the P-CSCF 2. the P-CSCF locates the I-CSCF through NAPTR/SRV requests 3. the P-CSCF forwards the REGISTER to the I-CSCF 4. the I-CSCF interrogate the HSS to discover which S-CSCF should serve this Private Address 5. the I-CSCF forwards the REGISTER to the S-CSCF 6. the S-CSCF process the request and add the Service-Route in the answer So the goal of the Service-Route is to avoid all this process to locate the correct S-CSCF which should serve this request, by having the UA appending it to the Route header in all request after a Register. this doesn't change the fact that, from where you're connecting, you need to go through a small SIP proxy which acts like an application-level firewall. And this SIP proxy should be an outbound_proxy. Anyway, thx for the modification Have a nice sunday Olivier Benny Prijono a ?crit : > Sorry for not coming back to the list with the info. So yeah, for > now I use the append approach, so the Service-Route will be appended > to both outbound and account proxies. I prefer this one since it is > simpler, no need to add new option, and it is somewhat backward > compatible with existing config. But if it proves to be the wrong > choice I'm willing to consider the alternative (adding > --acc-outbound option). > > cheers, > -benny > > Olivier Beytrison wrote: >> Sorry, nevermind my last mail, I should have check the svn before >> sending it. >> >> Thanks a lot Benny >> >> Olivier >> >> Benny Prijono a ?crit : >>> Okay, thanks for the info. >>> >>> So is appending Service-Route to existing/preconfigured route set >>> the best approach? Any potential pitfalls with this? (I can't think >>> of any). >>> >>> -benny > > > > _______________________________________________ > Visit our blog: http://blog.pjsip.org > > pjsip mailing list > pjsip at lists.pjsip.org > http://lists.pjsip.org/mailman/listinfo/pjsip_lists.pjsip.org -- Olivier Beytrison Telecommunication Engineer Mobile: +41 (0)78 619 73 53 Mail: olivier at heliosnet.org GPG: 0x4FB83528 http://pgp.mit.edu/
