myrules comment

[varun_saa@vsnl.net]

Hello,
     My server is Mandrake 10.1
eth0 is WAN with static IP connected to 512k DSL
eth1 is LAN.

Basically I want clients to able to :

1. send and recieve mails

2. browse the net through squid

3. Use MSN or Yahoo


My iptables config is as follows :

# Generated by iptables-save v1.2.9 on Thu Oct 21 05:32:36 2004
*nat
:OUTPUT ACCEPT [0:0]
:PREROUTING ACCEPT [0:0]
:POSTROUTING ACCEPT [0:0]
-A POSTROUTING -o eth0 -j MASQUERADE
COMMIT
# Completed on Thu Oct 21 05:32:36 2004
# Generated by iptables-save v1.2.9 on Thu Oct 21 05:32:36 2004
*mangle
:PREROUTING ACCEPT [32056:3889577]
:INPUT ACCEPT [32010:3885659]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [31637:4617585]
:POSTROUTING ACCEPT [31639:4618071]
COMMIT
# Completed on Thu Oct 21 05:32:36 2004
# Generated by iptables-save v1.2.9 on Thu Oct 21 05:32:36 2004
*filter
:FORWARD DROP [0:0]
:INPUT DROP [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -j ACCEPT
-A INPUT -s 127.0.0.1 -j ACCEPT
-A INPUT -p tcp -m tcp -i eth1 --dport 3128 -j ACCEPT
-A INPUT -p udp -m udp -i eth1 --dport 3128 --sport 80 -j ACCEPT
-A INPUT -s 62.0.0.0/255.0.0.0 -i eth0 -j REJECT
-A INPUT -p tcp -m tcp -s 217.81.0.0/255.255.0.0 -i eth0 -j REJECT
-A INPUT -i eth0 -j DROP
-A INPUT -p tcp -m tcp -i eth1 --sport 80 -j DROP
-A INPUT -m state -i eth1 --state ESTABLISHED,RELATED -j ACCEPT
-A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
-A FORWARD -i eth1 -o eth0 -p tcp --syn --sport 1024 --dport 25 -j ACCEPT
-A FORWARD -i eth1 -o eth0 -p tcp --syn --sport 1024 --dport 110 -j ACCEPT    
COMMIT
# Completed on Thu Oct 21 05:32:36 2004

Please feel free to comment and correct.


Thanks

Varun