Hi Matteo, I remember to had a similar setup and it wasn’t a problem for me.
I did have this the configuration running with an older version of Kamailio 5.2 or so but I did configure the following for the path module on the edge proxy: /* ----- path params ------------------------------------------------------- */ modparam("path", "use_received", 1) modparam("path", "enable_r2", 1) modparam("path", "received_format", 1) route [CALLER_NAT_DETECT] { force_rport(); if (nat_uac_test("27")) { if (is_method("REGISTER")) { add_path_received(); } else if (is_first_hop()) { set_contact_alias(); } setflag(FLT_NATS); } else if (is_method("REGISTER")) { add_path(); } } And on the registrar: modparam("registrar", "path_mode", 1) modparam("registrar", "path_use_received", 1 It was from an old setups but maybe it does help. Greetings Rick > On 17. Jul 2022, at 11:05, matteo brancaleoni <mbrancale...@gmail.com> wrote: > > > Hello, > > I'm trying to setup the following scenario with sip ping: > > UAC -> Kamailio Edge -> Kamailio Registrar > > Edge proxy is a multihomed proxy with public/private ips and the registrar is > a kamailio on a private network. The edge acts as a nat proxy and > loadbalancer. > > Edge proxy inserts a Path header (and contact alias) which get correctly > saved on registrar usrloc. Registration works as expected. > > Now, since I need to keep nat open towards the uacs and expire them when > they're not reachable anymore, I'm trying to send sip pings from the > registrar via the edge proxy. I'm using nathelper sipping in the registrar. > > What I see is that the registrar sends out a sip options putting in the Route > header the Path as expected, but the sip packet gets sent directly to the UAC > contact and not via the edge, as the Route header specifies. > > After looking into the nathelper code, it seems that the sip packet is sent > via udp directly without any specific routing. So the question: it should > work what I'm trying to achieve? Maybe not? > > Probably I can work around it setting the ;received in the contact on > registrar (it will set to the edge proxy) and since the contact is aliased on > the edge when the edge receives an option from the registrar it can process > the alias and send it to the correct endpoint, but seems a workaround? > > Or using the keepalive module maybe, even if that means setting specific > timers and manually do what the nathelper module already does? > > Any hint? > > Thanks, > Matteo > __________________________________________________________ > Kamailio - Users Mailing List - Non Commercial Discussions > * sr-users@lists.kamailio.org > Important: keep the mailing list in the recipients, do not reply only to the > sender! > Edit mailing list options or unsubscribe: > * https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
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