I tried your suggestions below and yes, I finally have two websites working on the same box. Simplifying things does indeed work. Is there a way to, by default drop everything on the output chain, but insert a rule to allow only http requests that were initialed by a client to either website? Or if my input rules are sufficient, do I really need to do anything on the output chain other than let everthing out? Thanks, Justin >>> Roy Sigurd Karlsbakk <roy@karlsbakk.net> 12/31 1:49 PM >>> On Tuesday, December 31, 2002, at 05:29 PM, JUSTIN GERRY wrote: > I am attempting to setup two websites with two ip address, each one on > a > different ethernet card/interface. > > It only seems to work for the first rule (first listed ip address) that > gets matched up, so I can get one website to work but not the other. > How > do I write this so it covers both address and allows httpd to go to > either interface or either address? Can I write a single rule to match > a > range of ip addresses (.93 and .94) instead of writing one for each > individual address? > > This is what I have so far for testing..... > > IF1="eth0" > IF2="eth1" > IP2="172.30.12.93" > IP1="172.30.12.94" > UNPRIVPORTS="1024:65535" > > iptables -F > iptables -P INPUT DROP > iptables -P FORWARD DROP > iptables -P OUTPUT DROP > > iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT the two below... > iptables -A INPUT -i $IF1 -p tcp --sport $UNPRIVPORTS -d $IP1 --dport > 80 -m state --state NEW -j ACCEPT > iptables -A INPUT -i $IF2 -p tcp --sport $UNPRIVPORTS -d $IP2 --dport > 80 -m state --state NEW -j ACCEPT ...are included in these two, so you won't need both. You probably don't want those below, as they accept anything regardless to state. > iptables -A INPUT -i $IF1 -p tcp --sport $UNPRIVPORTS -d $IP1 --dport > 80 -j ACCEPT > iptables -A INPUT -i $IF2 -p tcp --sport $UNPRIVPORTS -d $IP2 --dport > 80 -j ACCEPT are these really nessecary? with -P DROP, this'll deny any outgoing connections at all, regardless of protocol. It'll even drop ICMP packets, something you probably don't want. > iptables -A OUTPUT -o $IF2 -p tcp ! --syn -s $IP2 --sport 80 --dport > $UNPRIVPORTS -j ACCEPT > iptables -A OUTPUT -o $IF1 -p tcp ! --syn -s $IP1 --sport 80 --dport > $UNPRIVPORTS -j ACCEPT To allow for multiple hosts in a rule, you can specify a mask (or number of bits). For instance: # iptables -s 10.0.0.0/31 will match 10.0.0.0 and 10.0.0.1. .93 and .94, however, overlaps this and needs to be allowed for specifically. so - try first with -P OUTPUT -j ACCEPT, and no rules in the OUTPUT chain. It shouldn't be any problem then. roy
