Starting Nmap 7.31 ( https://nmap.org ) at 2017-02-16 17:13 RTZ 4 (ceia)
Nmap scan report for xxx.xxx.xxx.xxx
PORT STATE SERVICE
181/tcp open unify
RouterOS opened 181 tcp port? what is it? how to disable?
/ip firewall mangle
add action=log chain=output protocol=tcp src-port=181
14:50:49 firewall,info output: in:(none) out:internal, proto TCP (ACK,RST), <server>:181-><client>:36382, len 40
14:50:52 firewall,info output: in:(none) out:internal, proto TCP (SYN,ACK), <server>:181-><client>:45958, len 60
14:50:52 firewall,info output: in:(none) out:internal, proto TCP (ACK,PSH), <server>:181-><client>:45958, len 68