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NAt or Global in PIX

Posted on 2006-03-23
Medium Priority
Last Modified: 2010-04-08
Hi guys,

How do I assign fix Ip to my web server ?

Currently I have 5 available IP - .

I want my web server( to use and email server to use ( . The rest remaining IP will be on the inside.

Is this list of command correct ?

global (outside) 1

nat (inside) 1 0 0

static (inside,outside) 0 0
static (inside,outside) 0 0

access-list outside_access_in permit tcp any host eq www
access-list outside_access_in permit tcp any host eq smtp

Please let me know where I have been wrong ?
Question by:daisan
1 Comment
LVL 19

Accepted Solution

nodisco earned 2000 total points
ID: 16278568
You are close!

The problem is that your static nat exists in your global range - this will not work and you need to apply the access-list to your outside interface.

static (inside,outside) netmask
static (inside,outside) netmask

access-list outside_access_in permit tcp any host eq www
access-list outside_access_in permit tcp any host eq smtp
access-group outside_access_in in interface outside

global (outside) 1 interface
nat (inside) 1 0 0

The access-group command applies the access-list to the outside interface
The global (outside) 1 interface command translates all the ips from the matching nat ID (1) to the outside ip address of the PIX - its called PAT.

inside hosts 10.88.0.x, 10.88.0.y, 10.88.0.z go out the internet
On the internet their public ip address is now the outside ip address of the pix - If you are short on public ips it gives you 4000 hosts via PAT - port address translation.

One Question - the webservers are 10.10.1.x and the nat inside is
Does the 10.10.1.x network exist inside a router from the PIX?  If so you will need a route on the PIX to the inside network via the routers inside ip address.
e.g if the routers inside ip is
route inside

If this is unclear or you need further help - just post.
Post up your config if you need it explained clearer



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