OS V7.8 BGP needs port 23 open

RouterOS General
1

I lock down access to INPUT and found that my iBGP fails if I do not allow port 23. How come?

2

bgp session is on tcp 179,

maybe you either accidentally dropped it in your fw rules - or you have misconfigured somewhere else.

3

I have the 179 rule in and see traffic on it. The 23 rule does not have any traffic, but if I disable that rule (23) my BGP goes down. It’s very strange.

4

Sounds like something is there that you are not expecting. Post your config and the answer likely will reveal itself.