Hi Rick Thank you for pointing me the right direction. I just also read: http://www.kamailio.org/wiki/cookbooks/devel/core#listen But I don't get the hostname added. I attempted (x.x.x.x of course with real IP and real domain names) listen = udp:x.x.x.x:5060 advertise "sip.dns.example.com":5060 => x.x.x.x is put in Via and Record-Route header. listen = udp:x.x.x.x:5060 advertise "sip.dns.example.com"; # as per cookbook, without port => x.x.x.x is put in Via and Record-Route header. listen = udp:x.x.x.x:5060 advertise 11.11.11.11:5060; # as per cookbook => 11.11.11.11 is put in Via and Record-Route header. So this does not seem to take a hostname as parameter. Am I missing something? Like could an alias= line cause this not to work? Mit freundlichen Grüssen -Benoît Panizzon- -- I m p r o W a r e A G - Leiter Commerce Kunden ______________________________________________________ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________

Hello World and Rick I start doubting, this was a clever idea... I wonder what solutions other have come up to. After some testing I noticed: SIP ALG on NAT devices do work by IP, not by hostname. So getting traffic from the kamailio instance they were not talking too before (or did not register to) breaks on NAT situations. Also SBC do not seem to respect the Via header and always sending traffic back to the IP it received traffic from. How do other build redundant, high available platforms with kamailio avoiding those pitfalls? Mit freundlichen Grüssen -Benoît Panizzon- -- I m p r o W a r e A G - Leiter Commerce Kunden ______________________________________________________ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________

Hello, yes, User Agents or ALGs can make this approach difficult unfortunately. If you can handle it technically and also from a complexity point of view, an IP anycast setup could be used. Some people use that, especially for larger platforms. The usual IP failover approach can be also used for smaller platforms. Cheers, Henning -- Henning Westerholt – https://skalatan.de/blog/ Kamailio services – https://gilawa.com -----Original Message----- From: Benoit Panizzon <benoit.panizzon(a)imp.ch> Sent: Monday, December 19, 2022 2:24 PM To: Rick Barenthin <dunst0(a)gmail.com> Cc: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org> Subject: [SR-Users] Re: DNS Host-Names in Via and Record-Route for more redundancy? Hello World and Rick I start doubting, this was a clever idea... I wonder what solutions other have come up to. After some testing I noticed: SIP ALG on NAT devices do work by IP, not by hostname. So getting traffic from the kamailio instance they were not talking too before (or did not register to) breaks on NAT situations. Also SBC do not seem to respect the Via header and always sending traffic back to the IP it received traffic from. How do other build redundant, high available platforms with kamailio avoiding those pitfalls? Mit freundlichen Grüssen -Benoît Panizzon- -- I m p r o W a r e A G - Leiter Commerce Kunden ______________________________________________________ Zurlindenstrasse 29 Tel +41 61 826 93 00 CH-4133 Pratteln Fax +41 61 826 93 01 Schweiz Web http://www.imp.ch ______________________________________________________ __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: