topic How to bypass nat on lan in Network Security

How to bypass nat on lan

Lharrypersaud — Mon, 11 Mar 2019 09:58:29 GMT

I have a pix 515 running version 634 with four interfaces, for example, outside, inside, dmz and lab. I need to be able to connect to devices that is located on both the dmz and lab from inside. I also need to connect to devices that is located on the dmz from lab. The lab has a higher security than the dmz. I am also using remote access vpn. I would really appreciate if someone can help me with this as i have been working on it for a few days now.

Re: How to bypass nat on lan

srue — Tue, 10 Apr 2007 19:27:11 GMT

example for single host:

static (inside,outside) 10.1.1.1 10.1.1.1

example for subnet:

static (inside,outside) 10.1.1.0 10.1.1.0

you will also need to use nat zero:

access-list acl_name permit ip 192.168.1.0 255.255.255.0 10.1.1.0 255.255.255.0

nat (inside) 0 access-list acl_name

acl_name defines source/destination ip pairs that you don't want nat'ed. so this acl would read - when a host on subnet 192.168.1.0/24 attempts to contact a host on 10.1.1.0 subnet, do not NAT the 192.168.1.x address.

Re: How to bypass nat on lan

Lharrypersaud — Tue, 10 Apr 2007 19:29:51 GMT

I will try that.

Thank you.