X ALL THE THINGS - FIREWALL OPEN ALL PORTS!

Often our customers have own servers where installed different OSs and sometimes there are some complications to configure and install web apps. Just to keep records on issues which we met I’ll post in the blog short description and solutions.

Today we got a server with CentOS 8 on the board, after installed all software few ports were closed by firewall.

In this case apply rules to firewall was not that difficult but it worse to share:

  1. Check current active zone (it’ll show something like dmz, public, etc.): firewall-cmd --get-active-zones
  2. In my case it was public, so I run firewall-cmd --zone=public --add-port=8080/tcp --permanent
  3. And after firewall reloaded firewall-cmd --reload the port become open to the World.

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