[Blackaslan]

The following is a command to only accept secures ports

Код:

iptables -restore <iptables

It allows access to secure ports , the rest will be dropped


Rate Limiting Connections:

you can have control of ip's connecting to your server

Example:

Код:

iptables -A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -m recent --set
iptables -A INPUT -p tcp -m tcp --dport 22 -m state --state NEW -m recent --update --seconds 60 --hitcount 4 -j DROP

This allows up to 3 connections from the same IP in a 60 second period. Any more than that are blocked (and not logged).

This work for me !