Quickzi: How To Block Incoming Access to Port 80

Here is a quick Linux tip to block incoming access to port 80 using iptables.

iptables -A INPUT -j DROP -p tcp --destination-port 80 -i eth0

The code above will drop all tcp packets coming into your Linux computer on device eth0 on port 80.  If your Internet connection runs through a device other than eth0, go ahead and make the adjustment.

To remove the iptables rule use the following code:

iptables -D INPUT -j DROP -p tcp --destination-port 80 -i eth0

For more information on using iptables visit the iptables man page.

2 thoughts on “Quickzi: How To Block Incoming Access to Port 80

  1. I want to turn off internet for a given user… but when I do this the remote access is also getting disabled?

    Any ideas where I can disable internet and not both internet and remote login.

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