IPtables

[dude <dude@deletia.com>]

WOuld someone please comment on this firewall?

The only server i want to proivde iss SSH to the outside
internet but looking at the docs im not sure how.

Would apprciate help
Thankx
Below is my inid. script

#!/bin/sh
#chmod 755 is needed to make this executable

#Turn on ip_forward with this command
echo 1 > /proc/sys/net/ipv4/ip_forward


#Clean up tables
iptables -F
iptables -X
iptables -Z



#This allow maquerading
iptables -t nat -A POSTROUTING -j MASQUERADE



#This allow a connection from inside the network
#tank
iptables -A INPUT -s 192.168.2.2 -j ACCEPT
iptables -A OUTPUT -d 192.168.2.2 -j ACCEPT

#evvie
iptables -A INPUT -s 192.168.2.20 -j ACCEPT
iptables -A OUTPUT -d 192.168.2.20 -j ACCEPT

#text
iptables -A INPUT -s 192.168.2.3 -j ACCEPT
iptables -A OUTPUT -d 192.168.2.3 -j ACCEPT


# Disallow NEW and INVALID incoming or forwarded packets from eth0.
#iptables -A INPUT -i eth0 -m state --state NEW,INVALID -j DROP
#iptables -A FORWARD -i eth0  -m state --state NEW,INVALID -j DROP



#Most people just have a single PPP connection to the Internet,
#and don't want anyone coming back into their network, or the firewall:
## Create chain which blocks new connections, except if coming from
inside.
iptables -N block
iptables -A block -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A block -m state --state NEW -i ! eth0 -j ACCEPT
iptables -A block -j DROP

 ## Jump to that chain from INPUT and FORWARD chains.
iptables -A INPUT -j block
iptables -A FORWARD -j block