Tools / Port checker / 995
Is port 995 open?
Port 995 is POP3S. Enter your server below to test it from Dallas, Amsterdam and London.
What port 995 is used for
POP3 over TLS: mail clients downloading messages over an encrypted connection.
Should port 995 be open?
Normal to open to the internet. Safe to expose on a mail server; brute-force protection still matters.
How to open port 995
Ubuntu or Debian with ufw:
sudo ufw allow 995/tcp
Rocky, Alma or CentOS with firewalld:
sudo firewall-cmd --permanent --add-port=995/tcp && sudo firewall-cmd --reload
Windows Server, in PowerShell as administrator:
New-NetFirewallRule -DisplayName "Port 995" -Direction Inbound -Protocol TCP -LocalPort 995 -Action Allow
Then check that the service listens on all addresses, not only 127.0.0.1, and test again above.
Check another port
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Run your service on a PrivateByte server: a firewall you control and every port yours to open.