On 17 Dec 2020, Michiel van der Vlist said the following...
 Mv>  CP> Testing new node and feed setup.
 Mv> 
 Mv> 
 Mv>   19:33 [580] creating a poll for 1:106/127@fidonet (`d' flavour)
 Mv>   19:33 [580] clientmgr started
 Mv> + 19:33 [1964] call to 1:106/127@fidonet
 Mv>   19:33 [1964] trying theoasisbbs.ddns.net [76.30.30.13]:1357...
 Mv>   19:33 [1964] connected
 Mv> + 19:33 [1964] outgoing session with theoasisbbs.ddns.net:1357
 Mv> [76.30.30.13] ? 19:34 [1964] timeout!
 Mv> + 19:34 [1964] done (to 1:106/127@fidonet, failed, S/R: 0/0 (0/0 bytes))
 Mv>   19:34 [1964] session closed, quitting...
 Mv>   19:34 [580] the queue is empty, quitting...
 Mv> 
 Mv> 
 Mv> Cheers, Michiel

That port is Telnet.

--- Mystic BBS v1.12 A46 2020/08/26 (Raspberry Pi/32)