Re: default policy

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Am Die, 2003-08-26 um 10.35 schrieb Payal Rathod:
> $IPTABLES -P INPUT DROP
> $IPTABLES -P OUTPUT ACCEPT
> $IPTABLES -P FORWARD DROP
> 
> $IPTABLES -t nat -A POSTROUTING -j MASQUERADE
> 
> $IPTABLES -A FORWARD -s 125.125.125.0/24 -p tcp -m tcp --dport 21 -j ACCEPT
> $IPTABLES -A FORWARD -s 125.125.125.0/24 -p tcp -m tcp --dport 80 -j ACCEPT
> $IPTABLES -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT
> $IPTABLES -A FORWARD -p icmp --icmp-type 0 -j ACCEPT
> 
> When I make FORWARD POLICY as ACCEPT it works, but not when I make it
> to DROP? Is there any bad rule anywhere?
Yes, apply masquerading only to the external interface, like
$IPTABLES -t nat -A POSTROUTING -o eth1 -j MASQUERADE
If 125.125.125.0 is your internal ip-range you should be able to browse
to:
http://217.160.128.61
But since you do not allow any DNS traffic you can't resolve any
hostnames.

Cheers,

Ralf
-- 
Ralf Spenneberg
RHCE, RHCX

Book: Intrusion Detection für Linux Server   http://www.spenneberg.com
IPsec-Howto				     http://www.ipsec-howto.org
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