iptables block access to port 8000 except from IP address

firewall iptables
will picture will · Sep 14, 2011 · Viewed 115k times · Source

I've never used iptables, and the documentation online seems a bit opaque.

I'd like to block all requests to port 8000 on my server except those coming from a specific IP address. How do I do that using iptables?

Answer

Jon Bright picture Jon Bright · Sep 14, 2011

This question should be on Server Fault. Nevertheless, the following should do the trick, assuming you're talking about TCP and the IP you want to allow is 1.2.3.4:

iptables -A INPUT -p tcp --dport 8000 -s 1.2.3.4 -j ACCEPT
iptables -A INPUT -p tcp --dport 8000 -j DROP

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