Hey Team,

Thank you for the awesome software

### Description

Neither option work:

`listen=... advertise some.custom.hostname.io` `listen=... advertise some.custom.hostname.io:0`

to make Kamailio present only hostname(without port) in Record-Route headers, affects NAPTR/SRV.

### Troubleshooting

============ _Hostname without port - still gives port 5081 in Record-Route_

**kamailio.cfg** ... `listen=tls:KAM_LOC_IP:5081 advertise some.custom.io name "provider_socket_tls"` ...

**sngrep, 200 OK for INVITE** ... `Record-Route: sip:some.custom.io:5081;transport=tls;r2=on;lr;did=494.6e51` ...

**kamcmd corex.list_sockets** ... ``` { af: IPv4 proto: tls name: 172.17.57.164 addrlist: { addr: 172.17.57.164 } port: 5081 sockstr: tls:172.17.57.164:5081 mcast: no mhomed: no virtual: no sockname: provider_socket_tls advertise: tls:some.custom.io:0 } ``` ...

======== _Hostname with port 0 - still gives port 5081 in Record-Route_

kamailio.cfg ... `listen=tls:KAM_LOC_IP:5081 advertise some.custom.io:0 name "provider_socket_tls"` ...

sngrep, 200 OK for INVITE ... `Record-Route: sip:some.custom.io:5081;transport=tls;r2=on;lr;did=042.7721` ...

kamcmd corex.list_sockets ... ``` { af: IPv4 proto: tls name: 172.17.57.164 addrlist: { addr: 172.17.57.164 } port: 5081 sockstr: tls:172.17.57.164:5081 mcast: no mhomed: no virtual: no sockname: provider_socket_tls advertise: tls:some.custom.io:0 } ``` ...

============ _Hostname with explicit different port 8888 - gives that port 8888 in Record-Route (to confirm config works)_

kamailio.cfg ... `listen=tls:KAM_LOC_IP:5081 advertise some.custom.io:8888 name "provider_socket_tls"` ...

sngrep, 200 OK for INVITE ... `Record-Route: sip:some.custom.io:8888;transport=tls;r2=on;lr;did=dae.ac31` ...

kamcmd corex.list_sockets ... ``` { af: IPv4 proto: tls name: 172.17.57.164 addrlist: { addr: 172.17.57.164 } port: 5081 sockstr: tls:172.17.57.164:5081 mcast: no mhomed: no virtual: no sockname: provider_socket_tls advertise: tls:some.custom.io:8888 } ``` ...

#### Reproduction

Please see Troubleshooting section

#### Debugging Data

Please see Troubleshooting section

#### Log Messages

N/A

#### SIP Traffic

Please see Troubleshooting section

### Possible Solutions

N/A

### Additional Information

* **Kamailio Version** - output of `kamailio -v`

``` version: kamailio 5.8.2 (x86_64/linux) dbe51d flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, MEM_JOIN_FREE, 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_SEND_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: dbe51d compiled on 07:13:22 Jul 17 2024 with gcc 12.2.0) ```

* **Operating System**:

``` [dev]root@[voiceproxy]:~# lsb_release -a No LSB modules are available. Distributor ID: Debian Description: Debian GNU/Linux 12 (bookworm) Release: 12 Codename: bookworm [dev]root@[voiceproxy]:~# uname -a Linux i-0875d7720d6152612 6.1.0-23-cloud-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.99-1 (2024-07-15) x86_64 GNU/Linux [dev]root@[voiceproxy]:~# cat /etc/*relea* ID=ec2 VERSION="20240702-1796" PRETTY_NAME="Debian GNU/Linux 12 (bookworm)" NAME="Debian GNU/Linux" VERSION_ID="12" VERSION="12 (bookworm)" VERSION_CODENAME=bookworm ID=debian HOME_URL="https://www.debian.org/" SUPPORT_URL="https://www.debian.org/support" BUG_REPORT_URL="https://bugs.debian.org/" ```

* **Might be related** : https://github.com/kamailio/kamailio/issues/1884