Port 110TCP
Recovery of,emails without native encryption.
What is the purpose of port 110?
Email. The protocol or service generally associated is POP3.
Transport Protocol
TCP
Safety precautions
Prefer POP3S 995 or IMAPS 993.
Should we open this port in the firewall?
Only if a service is actually needed the use it. Apply the principle of any privilege: limit the authorized sources, destinations and interfaces, and then log connections when relevant.
How do I check this port?
Test-NetConnection SERVER -Port 110Under Linux, you can use nc -vz SERVER 110.
Port/service associations are common conventions. An application can be configured on another port.