I understand intermediate endpoints *expect* these headers, this is why I asked if there's anyway for Kamailio to remember what is removed and essentially re-add them to the response, IE-
SIP request hits edge proxy from internal network > Via and Route headers from intermediate proxies are removed, previous 'path' is stored in memory linked to the dialog > SIP request is forwarded to end point. End point responds to request via edge proxy > edge proxy looks up existing dialog and reinserts the missing headers > forwards to the next hop. What I'm asking is theoretically possible, although it may not be RFC compliant or something that Kamailio supports. Thanks On Sun, Mar 20, 2016 at 2:40 AM, Alex Balashov <abalas...@evaristesys.com> wrote: > On 03/19/2016 09:43 PM, Marrold wrote: > > It should be theoretically possible to remove some of the via and >> record-route headers, assuming the contact is also re-written. The end >> point's (phones) themselves do not need to be aware of anything >> downstream of the SIP server they're registered too. >> > > No, because intermediate endpoints: > > (1) Expect the Route set to remain as configured between the two endpoints; > > (2) Expect Vias corresponding to their hop to remain as upstream elements > remove theirs in transit. > > You can't break SIP like that - terribly sorry! :-) > > -- Alex > > > -- > Alex Balashov | Principal | Evariste Systems LLC > 1447 Peachtree Street NE, Suite 700 > Atlanta, GA 30309 > United States > > Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct) > Web: http://www.evaristesys.com/, http://www.csrpswitch.com/ > > _______________________________________________ > SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list > sr-users@lists.sip-router.org > http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users >
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