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Old 02-20-2004, 05:57 PM   #1
Registered: Dec 2003
Location: Seattle, Washington
Distribution: Debian 'Sarge'
Posts: 85

Rep: Reputation: 15
locked in my own firewall

I'm trying to setup my workstation, starting with a minimal debian install. There will be no services running and I want it secure, however, my iptables are blocking me from the outside. I'm using the rules below (having tried both commented lines as well)...

iptables -P INPUT DROP
iptables -P FORWARD DROP

# iptables -A INPUT -i eth0 -p icmp -j ACCEPT
# iptables -A INPUT -p tcp --dport 80 -j ACCEPT

iptables -A INPUT -i lo -j ACCEPT
iptables -A OUTPUT -o lo -j ACCEPT

So far there has been no escape, can anyone help punch the right holes?
Old 02-20-2004, 06:08 PM   #2
Registered: Feb 2002
Location: Grenoble
Distribution: Debian
Posts: 9,683

Rep: Reputation: 219Reputation: 219Reputation: 219
You drop EVERYTHING from outside, even replies to your own requests. Add
iptables -A INPUT -m state --state ESTABLISHED, RELATED -j ACCEPT


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