iptables to forward traffic

[Ninja]

hello...

i have a router with multiple interfaces

eth0 "internet"
eth1 "10.2.2.1"
eth2 "10.3.3.1"


and i have a transparent proxy which is over the INTERNET

and i want to forward all web traffic either from eth1 or eth2 to the proxy server which is located in the internet

i have these rules which works for 1 subnet i guess:

iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -d 10.2.2.1 -j ACCEPT
iptables -t nat -A PREROUTING -i eth1 -s ! proxyip -p tcp --dport 80 -j DNAT --to proxyip:8080
iptables -t nat -A POSTROUTING -o eth1 -s 10.2.2.1/24 -d proxyip -j SNAT --to 10.2.2.1
iptables -I FORWARD -s 10.2.2.1/24 -d proxyip -i eth1 -p tcp --dport 8080 -j ACCEPT


but i dont want to put any IPS or subnet other than the proxyip in the rules

is it possible ?

in other words:

can i use a rules to forward all web traffic going through eth0 to the proxyip whatever the network subnet/range/ip is just forward all web traffic from eth0 to the proxy

you may wonder why...because i want to use these rules in a shell script to run it in multiple routers with different ips/ranges

[Dudeman02379]

I may be off here but I think it would make sense to just make the IP's variables. Then when you can call the shell script with values for the variables. So something like this

iptables -t nat -A PREROUTING -i eth1 -p tcp --dport 80 -d $1 -j ACCEPT
iptables -t nat -A PREROUTING -i eth1 -s ! proxyip -p tcp --dport 80 -j DNAT --to proxyip:8080
iptables -t nat -A POSTROUTING -o eth1 -s $2 -d proxyip -j SNAT --to $I1
iptables -I FORWARD -s $2 -d proxyip -i eth1 -p tcp --dport 8080 -j ACCEPT

and call like this
sh nameofyourscript.sh 10.2.2.1 10.2.2.1/24