### Description Hello, I have faced an issue when mhomed working well only for udp destinations, and I believe that it is a bug. I have kamailio behind NAT with two network interfaces and I make a call from a softphone to kamailio and change $rd on kamailio side. If kamailio forward call to the UDP destination, mhomed option chooses the correct Via and the correct interface for sending. But if the destination is tls, mhomed chooses first described listen interface from the config file (as described in the documentation. #### The example So in my example when I call to sip:111@kamailio_ip kamailio going to send this call to $rd="1.1.1.1" and set Via and Record-Route to 10.0.0.32 (it is ok, because IP route to 1.1.1.1 via 10.0.0.32) when I call to sip:1111@kamailio_ip kamailio going to send this call to $rd="192.168.10.100:5061;transport=tls" BUT set Via and Record-Route to 10.0.0.32 (this is wrong because IP route to 192.168.10.100 is 192.168.10.145), but if in config file the first listen interface is 192.168.10.145, kamailio sends Via correct. #### Networking <img width="743" alt="image" src="https://user-images.githubusercontent.com/1487709/170417427-573f4… <img width="511" alt="image" src="https://user-images.githubusercontent.com/1487709/170417453-0a392… #### Kamailio config ``` auto_aliases=yes mhomed=1 tcp_connection_match=1 # I have tried with and without this option listen=udp:10.0.0.32:5060 listen=tls:10.0.0.32:5061 listen=udp:192.168.10.145:5060 listen=tls:192.168.10.145:5061 ..... modparam("rr", "enable_full_lr", 1) modparam("rr", "append_fromtag", 1) #modparam("rr", "enable_double_rr", 2) # I have tried with and without this option ..... # routing if $rU == "111" { $rd="1.1.1.1"; } else { $rd="192.168.10.100:5061;transport=tls"; } route(RELAY); ``` #### Reproduction I have created a testing stand with almost default kamailio config so I can give full ssh access if you need it. I just call from linphone to sip:111@server_ip and sip:1111@server_ip #### SIP Traffic <img width="554" alt="image" src="https://user-images.githubusercontent.com/1487709/170420217-882d2… ``` INVITE sip:111@1.1.1.1 SIP/2.0 Record-Route: <sip:10.0.0.32;lr=on;ftag=GRIfZymtj;nat=yes> Via: SIP/2.0/UDP 10.0.0.32;branch=z9hG4bKc662.d4fa02b9991c45869263fc4359af8d84.0 Via: SIP/2.0/UDP 10.5.7.0:52360;received=210.1.88.115;branch=z9hG4bK.mH58YeIkv;rport=35775 From: <sip:akam@10.5.7.0>;tag=GRIfZymtj To: sip:111@130.61.43.152 CSeq: 20 INVITE Call-ID: FR3BLskG9- Max-Forwards: 69 Supported: replaces, outbound, gruu Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, NOTIFY, MESSAGE, SUBSCRIBE, INFO, PRACK, UPDATE Content-Type: application/sdp Content-Length: 613 ``` <img width="584" alt="image" src="https://user-images.githubusercontent.com/1487709/170420360-a7889… ``` INVITE sip:1111@192.168.10.100:5061;transport=tls SIP/2.0 Record-Route: <sip:10.0.0.32:5061;transport=tls;r2=on;lr=on;ftag=cIRc7nj00;nat=yes> Record-Route: <sip:10.0.0.32;r2=on;lr=on;ftag=cIRc7nj00;nat=yes> Via: SIP/2.0/TLS 10.0.0.32:5061;branch=z9hG4bK6a2.4ff69c3e304e238936a5528da681cd49.0 Via: SIP/2.0/UDP 10.5.7.0:52360;received=210.1.88.115;branch=z9hG4bK.BPohOzqtI;rport=35775 From: <sip:akam@10.5.7.0>;tag=cIRc7nj00 To: sip:1111@130.61.43.152 CSeq: 20 INVITE Call-ID: 40PEbKneY0 ``` ### Additional Information ``` root@mhomed-tls:/etc/kamailio# kamailio -v version: kamailio 5.5.4 (x86_64/linux) flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: unknown compiled with gcc 9.3.0 ``` * **Operating System**: ``` Ubuntu 20.04.4 LTS ``` -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/3124 You are receiving this because you are subscribed to this thread. Message ID: &lt;kamailio/kamailio/issues/3124(a)github.com&gt;