14 Sep
2021
14 Sep
'21
3:26 p.m.
### Description
I use TCP sockets to relay calls to backend servers.
Also, I have enabled `tcp_reuse_port` and enabled `socket` attribute in dispatcher
settings.
INVITE messages to backend servers are now properly send from port 5060.
### Expected behavior
For all messages are used the same TCP socket and same source port for all messages
(including OPTIONS).
#### Actual observed behavior
But initial OPTIONS (before the first call send) uses a random source port.
### Additional Information
* **Kamailio Version** - output of `kamailio -v`
used current c503d2bd31a580138a67f1d4a265ccde5791d271 with small customization.
* **Operating System**:
aarch64
```
[root@sbc-a0 ~]# cat /etc/os-release
NAME="CentOS Linux"
VERSION="8"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="8"
PLATFORM_ID="platform:el8"
PRETTY_NAME="CentOS Linux 8"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:8"
HOME_URL="https://centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"
CENTOS_MANTISBT_PROJECT="CentOS-8"
CENTOS_MANTISBT_PROJECT_VERSION="8"
```
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