Re: myrules comment

[Mohammad Khan <mkhan@lextranet.com>]

On Thu, 2005-02-03 at 09:58 +0500, varun_saa@vsnl.net wrote:
> 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]
good

> :INPUT DROP [0:0]
good
> :OUTPUT ACCEPT [0:0]

> -A INPUT -j ACCEPT
You are accepting every packet
> -A INPUT -s 127.0.0.1 -j ACCEPT
rule unreachable
> -A INPUT -p tcp -m tcp -i eth1 --dport 3128 -j ACCEPT
rule unreachable
> -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
all rule unreachable



> -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

You should IPTables-HowTo.


MOhammad



> # Completed on Thu Oct 21 05:32:36 2004
> 
> Please feel free to comment and correct.
> 
> 
> Thanks
> 
> Varun
> 
> 
>