Hey all,
I have a questoin regarding iptables and natting. What I'm trying to do is
setup a iptables firewall to protect my LAN and Servers.
The ketch is that I'm using my Cisco Router to do the Natting.. So what I'm
trying to do bascially is just route across the 2 nics in the
Redhat 9 box and use the iptabes to allow/deny stuff from getting across.
The reason I'm doing this is that there are multiple interfaces for other things
on the Cisco and its just easier than trying
to replace the cisco with the RH box.
As it sits now I was thinking of this
INET E1 Cisco NAT E0 eth1
FW eth0
--------------------- ------------------------ >
--------------------------- ------------ >LAN
5 (Addresses) 10.255.0.1 10.255.0.2
10.11.11.1 10.10.10.6 Mail and www
server
10.10.10.7
other mail and www server
10.10.10.20-30 Workstations etc..
so the Cisco will nat the 5 ip's, into 2 direct ip's for servers and 1 for
general Lan natting for the local workstations...The cisco will have
simple/basic
Access listing as a first line of defence and then have them pass through the
FW box and do detailed rulesets and then off to the lan and approperiate
machine...
Can anyone lend any information of how I should configure the FW box to route
the traffic and any other examples that might help me to do this.
The last time i used a linux firewall it was a ipchains firewall using NAT
aswell directly connected to the internet, so this is a little twist for me and
I'm not exactly sure how I should go about doing it.
Any help would be appreicated.
Thanks in advance for your time and comments.
Dave
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