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howto start with gateway / router / masquerading
Post 302342948 by Zykl0n-B on Tuesday 11th of August 2009 06:16:01 AM
08-11-2009
Code:
Second, I understand that this means no limitation, no control and no secutity at all in the network traffic
The only device that is able to interconnect two logical networks is a router, so you want to interconnect three networks, then what you need is a router.
With iptables you can easily set up a router/firewall device for your network. It's included with Linux, so you don't have to pay or download anything at all.
What i understand of your needs is to set cassiopeia host to do something like this:
So, if i'm right you'll need three network interfaces and the problem is solved, here is how you must set iptables to make this work:
Code:
echo 1 >/proc/sys/net/ipv4/ip_forward echo 0 >/proc/sys/net/ipv4/conf/all/send_redirecs iptables -t nat -F iptables -F iptables -X iptables -Z iptables -A INPUT ACCEPT iptables -A OUTPUT ACCEPT iptables -A FORWARD ACCEPT iptables -t nat -A POSTROUTING -s 172.16.199.0/24 -o eth0 -j MASQUERADE iptables -t nat -A POSTROUTING -s 172.16.70.0/24 -o eth1 -j MASQUERADE iptables -t nat -A POSTROUTING -s 192.168.1.0/25 -o eth2 -j MASQUERADE
best regards
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LEARN ABOUT DEBIAN
ip6tables-apply
iptables-apply(8) System Manager's Manual iptables-apply(8) NAME
iptables-apply - a safer way to update iptables remotely SYNOPSIS
iptables-apply [-hV] [-t timeout] ruleset-file DESCRIPTION
iptables-apply will try to apply a new ruleset (as output by iptables-save/read by iptables-restore) to iptables, then prompt the user whether the changes are okay. If the new ruleset cut the existing connection, the user will not be able to answer affirmatively. In this case, the script rolls back to the previous ruleset after the timeout expired. The timeout can be set with -t. When called as ip6tables-apply, the script will use ip6tables-save/-restore instead. OPTIONS
-t seconds, --timeout seconds Sets the timeout after which the script will roll back to the previous ruleset. -h, --help Display usage information. -V, --version Display version information. SEE ALSO
iptables-restore(8), iptables-save(8), iptables(8). LEGALESE
iptables-apply is copyright by Martin F. Krafft. This manual page was written by Martin F. Krafft <madduck@madduck.net> Permission is granted to copy, distribute and/or modify this document under the terms of the Artistic License 2.0. 2006-06-04 iptables-apply(8)