Skip to main content

We're currently improving our systems to provide you with a new, more unified login experience.

Using CSF, how can I limit the number of connections to specific ports?

Eetion Narcisse
  • Updated

Question

I'd like to limit connections to specific ports in order to protect my server against DOS attacks. Is there a way to do this with CSF Firewall?

Answer

Yes, CSF provides a way to limit concurrent connections to specific ports. As an example, the following may be added to the configuration file to limit port 80 and port 443 to 5 connections.

CONNLIMIT = "80;5,443;5"

You can read more about this in the CSF Readme.

 

 

Related articles