many one-to-one NAT
Hi All,
I'm a newbie to this list and I apologize if this question has already appeared in previous posts. I would like to do NAT from a private range to a public range of the same size, in a way that just the network part of the IP address would be translated.
For example, I would like a single iptables rule to map 192.168.10.0/24 => 10.1.1.0/24 as follows:
192.168.10.1 => 10.1.1.1
192.168.10.2 => 10.1.1.2
.
.
.
192.168.10.254 => 10.1.1.254
I know that I can do it by defining the whole set of rules explicitly, but I'm looking for a better solution in terms of simplicity and performance. Can anyone help?
Thanks,
Signature · 6 lines
Yaron Presente MRV International Direct : 972-4-9936237 Fax : 972-4-9890564 Email : [email protected] www.mrv.com
Quoted 2 lines · Yaron Presente
I would like to do NAT from a private range to a public range of the same size, in a way that just the network part of the IP address would be translated.
Use the NETMAP target. This is included in 2.6, but I think you have to patch 2.4 kernels still.
Quoted 7 lines
For example, I would like a single iptables rule to map 192.168.10.0/24 => 10.1.1.0/24 as follows:
192.168.10.1 => 10.1.1.1
192.168.10.2 => 10.1.1.2
.
.
.
192.168.10.254 => 10.1.1.254
Assuming 192.168.10.0/24 is private:
iptables -t nat -A PREROUTING -d 10.1.1.0/24 -j NETMAP --to 192.168.10.0/24 iptables -t nat -A POSTROUTING -s 192.168.10.0/24 -j NETMAP --to 10.1.1.0/24
Signature · 1 line
Philip Craig - SnapGear, A CyberGuard Company - http://www.SnapGear.com