It is about setting the socket parameter inside the attributes (the attrs column) -- see:
- https://www.kamailio.org/docs/modules/stable/modules/dispatcher.html#dispatcher.ex.attributes Cheers, Daniel On 04.09.25 09:44, Martin Nyström wrote: > > We’re using the dispatcher with MySQL. Here’s the setid from kamcmd > dispatcher.list, this dns resolves to the Asterisk local ip > 10.2.5.206, are you saying I should use udp: instead of sip: for my > DEST entry? Would that really make any difference? > > > > SET: { > > ID: 100 > > TARGETS: { > > DEST: { > > URI: > sip:rtp-media.opm-media-namespace:5080?transport=DNS > > FLAGS: AX > > PRIORITY: 0 > > } > > } > > } > > > > > > > > /M > > > > *From: *Daniel-Constantin Mierla <mico...@gmail.com> > *Date: *Thursday, 4 September 2025 at 09:05 > *To: *Kamailio (SER) - Users Mailing List > <sr-users@lists.kamailio.org>, mico...@gmail.com <mico...@gmail.com> > *Cc: *Martin Nyström <martin.nyst...@connectel.se> > *Subject: *Re: [SR-Users] Re: Kamailio behind NAT > > > > > *CAUTION:*This email originated from outside the organization. Do not > click links or open attachments unless you recognize the sender and > know the content is safe. > > > > In the dispatcher routing records, be sure you have the attribute > socket=udp:localip:5080. > > > > Cheers, > Daniel > > > > > > On 03.09.25 13:03, Martin Nyström via sr-users wrote: > > I did the suggested changes, I think. But the INVITE sent from > Kamailio to Asterisk still holds the external advertised DNS in > the RR. > > > > Here’s the INVITE sent to Asterisk from Kamailio: > > > > eth1 Out IP 10.3.124.192.5060 > 10.2.5.206.5080: SIP: INVITE > sip:010xxxx...@sbc.coolcompany.com SIP/2.0 > > INVITE sip:010xxxx...@sbc.coolcompany.com SIP/2.0 > > Record-Route: > <sip:sbc.coolcompany.com;lr;ftag=5914da19-6958-4b8f-b521-d74c78af6120> > > Record-Route: <sip:sip-provider.com;lr=on> > > Call-ID: GEWPF3PEVFCQNL7FLWOMPWVH5A@x.x.x.x > > CSeq: 25896 INVITE > > From: <sip:076xxxx...@sip-provider.com> > > <mailto:sip:076xxxx...@sip-provider.com>;tag=5914da19-6958-4b8f-b521-d74c78af6120 > > To: <sip:010xxxx...@sbc.coolcompany.com> > <mailto:sip:010xxxx...@sbc.coolcompany.com> > > Contact: <sip:0101388290@10.3.124.192:5080> > <mailto:sip:0101388290@10.3.124.192:5080> > > Via: SIP/2.0/UDP > > sbc.coolcompany.com:5060;branch=z9hG4bKb32c.739784aeb0177ad4d3e181098a071abb.0;rport > > Via: SIP/2.0/UDP > sip-provider.com;branch=z9hG4bKb32c.79821495565acb8af61a7ebecb22b26d.0 > > Via: SIP/2.0/UDP > > sip-provider.com:5060;branch=z9hG4bK-323035-3a9c396118a108606e6234ff3013ed5b > > Max-Forwards: 67 > > Content-Type: application/sdp > > User-Agent: XXXX > > Content-Length: 293 > > > > > > Asterisk attempts to reply to the BYE on the external IP: > > > > <--- Transmitting SIP request (616 bytes) to > UDP:sbc.coolcompany.com:5060 ---> > > BYE sip:010xxxx@10.3.124.192:5080 SIP/2.0 > > Via: SIP/2.0/UDP > 10.2.5.206:5080;rport;branch=z9hG4bKPj917dd0c5-192b-457d-ae1a-ef693895e0c7 > > From: <sip:010xx...@sbc.coolcompany.com> > > <mailto:sip:010xx...@sbc.coolcompany.com>;tag=1f88f783-83a4-419f-a7c3-3c37a40dada6 > > To: <sip:076xxx...@sip-provider.com> > > <mailto:sip:076xxx...@sip-provider.com>;tag=3c6c6d47-8beb-4c71-a829-15138869defd > > Call-ID: 2XKUHXTUNNC7HPW7BFTI3TMT2E@x.x.x.x > > CSeq: 25915 BYE > > Route: > <sip:sbc.coolcompany.com;lr;ftag=3c6c6d47-8beb-4c71-a829-15138869defd> > > Route: <sip:x.x.x.x;lr> > > Reason: Q.850;cause=16 > > Max-Forwards: 70 > > User-Agent: xxxx > > Content-Length: 0 > > > > > > > > Here’s again my dumbed down CFG with changes: > > > > debug=2 > > log_stderror=yes > > fork=yes > > tcp_accept_no_cl=yes > > onsend_route_reply=yes > > pv_buffer_size=2048 > > enable_tls=1 > > > > > > listen=udp:<LOCAL_IP>:5060 advertise <DOMAIN>:5060 > > listen=tcp:<LOCAL_IP>:5060 advertise <DOMAIN>:5060 > > listen=tls:<LOCAL_IP>:5061 advertise <DOMAIN>:5061 > > > > # INFO: Asterisk gateway listening > > listen=udp:<LOCAL_IP>:5080 > > listen=tcp:<LOCAL_IP>:5080 > > listen=tls:<LOCAL_IP>:5081 > > > > local_rport=on > > > > > mpath="/usr/local/lib/kamailio/modules_k/:/usr/lib/x86_64-linux-gnu/kamailio/modules/" > > > > loadmodule "rr.so" > > > > modparam("rr", "force_send_socket", 1) > > > > route { > > > > route(FROM_PROVIDER); > > exit; > > > > } > > > > route[RELAY] { > > > > if(!t_relay()) { > > > > sl_reply_error(); > > > > } > > > > exit; > > > > } > > > > route[FROM_PROVIDER] { > > > > # INFO: The Asterisk > > ds_select_dst(100, 4); > > > > if(!has_totag()) { > > record_route(); > > } > > > > route(RELAY); > > exit; > > > > } > > > > > > /M > > > > *From: *Martin Nyström <martin.nyst...@connectel.se> > <mailto:martin.nyst...@connectel.se> > *Date: *Wednesday, 3 September 2025 at 10:59 > *To: *mico...@gmail.com <mico...@gmail.com> > <mailto:mico...@gmail.com>, Kamailio (SER) - Users Mailing List > <sr-users@lists.kamailio.org> <mailto:sr-users@lists.kamailio.org> > *Subject: *Re: [SR-Users] Kamailio behind NAT > > Using a different port for Asterisk is not a bad idea. I might > just try that. I will return with the results or any follow up > questions. > > > > > > > > /M > > > > *From: *Daniel-Constantin Mierla <mico...@gmail.com> > <mailto:mico...@gmail.com> > *Date: *Wednesday, 3 September 2025 at 10:54 > *To: *Kamailio (SER) - Users Mailing List > <sr-users@lists.kamailio.org> <mailto:sr-users@lists.kamailio.org> > *Cc: *Martin Nyström <martin.nyst...@connectel.se> > <mailto:martin.nyst...@connectel.se> > *Subject: *Re: [SR-Users] Kamailio behind NAT > > > > > *CAUTION:*This email originated from outside the organization. Do > not click links or open attachments unless you recognize the > sender and know the content is safe. > > > > Hello, > > > > the simplest way is to listen on another port (e.g., 5080) and use > that socket to communicate with Asterisk. For that listen > parameter, do not set the advertise address. You can use $fs or > force_send_socket() to specify the socket to be used for sending > out to Asterisk. > > > > The alternative is to play in the config file with the function of > the rr module that allow you to set the address in the > Record-/Route headers, but it may increase the complexity of the > config. > > > > Cheers, > Daniel > > > > On 03.09.25 10:42, Martin Nyström via sr-users wrote: > > Hello, > > > > I am not successful in my attempts to configure my Kamailio to > work behind NAT. > > > > The flow of an incoming call is Provider (Internet) -> AWS > LoadBalancer -> Kamailio -> Asterisk > > > > Both the Kamailio and Asterisk is on the internal network. The > issue I am having is that I need to add Record-Route to the > traffic sent back towards the provider, but not to the > Asterisk. Currently when I add the record_route() the header > is sent to Asterisk which makes it reply to the Kamailio > advertised external address for ACKs, BYEs etc. > > > > I have dumbed down my Kamailio config as much as possible for > this, to show what I am currently doing. > > > > > > debug=2 > > log_stderror=yes > > fork=yes > > tcp_accept_no_cl=yes > > onsend_route_reply=yes > > pv_buffer_size=2048 > > enable_tls=1 > > > > listen=udp:<LOCAL_IP>:5060 advertise <EXTERNAL_DOMAIN>:5060 > > listen=tcp:<LOCAL_IP>:5060 advertise <EXTERNAL_DOMAIN>:5060 > > listen=tls:<LOCAL_IP>:5061 advertise <EXTERNAL_DOMAIN>:5061 > > > > local_rport=on > > > > > mpath="/usr/local/lib/kamailio/modules_k/:/usr/lib/x86_64-linux-gnu/kamailio/modules/" > > > > # MODULES > > loadmodule "..." > > > > route { > > > > route(FROM_PROVIDER); > > > > } > > > > > > route[RELAY] { > > > > if(!t_relay()) { > > > > sl_reply_error(); > > > > } > > > > exit; > > > > } > > > > route[FROM_PROVIDER] { > > > # The Asterisk that should not receive the > external dns in the record route header > > ds_select_dst(100, 4); > > > > # INFO: This adds the Record-Route in all > directions > > if(!has_totag()) { > > record_route(); > > } > > > > route(RELAY); > > exit; > > > > } > > > > > > > > > > > > /M > > > > __________________________________________________________ > > Kamailio - Users Mailing List - Non Commercial Discussions -- > sr-users@lists.kamailio.org > > To unsubscribe send an email to sr-users-le...@lists.kamailio.org > > Important: keep the mailing list in the recipients, do not reply only > to the sender! > > > > -- > > Daniel-Constantin Mierla (@ asipto.com) > > twitter.com/miconda -- linkedin.com/in/miconda > > Kamailio Consultancy, Training and Development Services -- asipto.com > > > > __________________________________________________________ > > Kamailio - Users Mailing List - Non Commercial Discussions -- > sr-users@lists.kamailio.org > > To unsubscribe send an email to sr-users-le...@lists.kamailio.org > > Important: keep the mailing list in the recipients, do not reply only to > the sender! > > > > -- > Daniel-Constantin Mierla (@ asipto.com) > twitter.com/miconda -- linkedin.com/in/miconda > Kamailio Consultancy, Training and Development Services -- asipto.com -- Daniel-Constantin Mierla (@ asipto.com) twitter.com/miconda -- linkedin.com/in/miconda Kamailio Consultancy, Training and Development Services -- asipto.com
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