How to Check if Port 25 is Blocked in Server Firewall Rules

July 2, 2022 / How-to Guide

This article gives information regarding port 25 blocked by your server’s firewall rules.

To access your server through the command line interface and use the iptables command to verify if port 25 is blocked in your server’s firewall rules:

Iptables –L –n | grep :25

There are some rules and terms like “DROP” in the command output that signify your server’s firewall rules and the blocking of traffic over port 25. 

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