Port 995: POP3S
TCP 995 is the port for POP3 over TLS. Fine on mail servers.
| Service | POP3 over TLS |
|---|---|
| Protocol | TCP |
| Exposure risk | Low: normally safe to expose |
| Range | Well-known (0–1023): binding needs root/admin on Unix |
What port 995 does
Secure POP3 downloads (pop.gmail.com:995).
Should port 995 be open?
Fine on mail servers.
Find what's listening on port 995
- Linux:
sudo ss -tulpn | grep :995 - macOS:
sudo lsof -nP -i :995 - Windows:
netstat -ano | findstr :995, then look up the PID in Task Manager.
Open or block it in a firewall
- ufw:
sudo ufw allow 995/tcp(ordeny) - firewalld:
sudo firewall-cmd --add-port=995/tcp --permanent && sudo firewall-cmd --reload - Windows:
New-NetFirewallRule -DisplayName "Port 995" -Direction Inbound -Protocol TCP -LocalPort 995 -Action Allow
Port assignment per the IANA Service Name and Transport Protocol Port Number Registry. Test several ports at once with the port scanner, or any port with the open port checker.
Questions about port 995
What is port 995 used for?
POP3 over TLS. Secure POP3 downloads (pop.gmail.com:995).
Is port 995 TCP or UDP?
TCP. POP3S uses TCP port 995.
Is it safe to open port 995?
Low: normally safe to expose. Fine on mail servers.
How do I check if port 995 is open?
Use the checker on this page: it connects to your host on TCP 995 from the internet. Locally, run
nc -vz host 995 (macOS/Linux) or Test-NetConnection host -Port 995 (PowerShell). To see what is listening on your own machine, run ss -tulpn | grep :995 (Linux) or netstat -ano | findstr :995 (Windows).