Example iptables config for a web server with ssh running on port 2222

iptables-webserver-sample

#!/bin/bash

# iptables configuration script

# Flush all current rules from iptables
 iptables -F

# Allow SSH connections on tcp port 2222
 iptables -A INPUT -p tcp --dport 2222 -j ACCEPT

# Allow HTTP connections on tcp port 80 and 443
 iptables -A INPUT -p tcp --dport 80 -j ACCEPT
 iptables -A INPUT -p tcp --dport 443 -j ACCEPT

# Set default policies for INPUT, FORWARD and OUTPUT chains
 iptables -P INPUT DROP
 iptables -P FORWARD DROP
 iptables -P OUTPUT ACCEPT

# Set access for localhost
 iptables -A INPUT -i lo -j ACCEPT

# Accept packets belonging to established and related connections
 iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

# Save settings
 /sbin/service iptables save


# List rules
 iptables -L -v