undocumented port?

[botanicvelious]

I was checking the ports rustdesk was using and noticed UDP port 36630 in use by hbbs does this need to be allowed in the firewall? If so i can add it to the docs.

hbbr         837            root    9u  IPv6  22591      0t0  TCP *:21117 (LISTEN)
hbbr         837            root   10u  IPv6  22592      0t0  TCP *:21119 (LISTEN)
hbbs         839            root   12u  IPv6  23715      0t0  UDP *:21116
hbbs         839            root   13u  IPv6  23716      0t0  TCP *:21116 (LISTEN)
hbbs         839            root   14u  IPv6  23717      0t0  TCP *:21115 (LISTEN)
hbbs         839            root   15u  IPv6  23718      0t0  TCP *:21118 (LISTEN)
hbbs         839            root   16u  IPv4  24615      0t0  UDP *:36630

[gn-ro]

I have noticed the same, hbbs listening to a random port (it seems) after every restart of the hbbs service:

tcp6 0 0 :::21115 :::* LISTEN 16996/hbbs tcp6 0 0 :::21116 :::* LISTEN 16996/hbbs tcp6 0 0 :::21117 :::* LISTEN 16835/hbbr tcp6 0 0 :::21118 :::* LISTEN 16996/hbbs tcp6 0 0 :::21119 :::* LISTEN 16835/hbbr udp 0 0 0.0.0.0:48000 0.0.0.0:* 16996/hbbs udp6 0 0 :::21116 :::* 16996/hbbs

[rustdesk]

I do not know where is the random udp port generated either.