Solved

pix without nat

Posted on 2006-06-17
7
482 Views
Last Modified: 2010-03-19
how should i configure a pix 506e firewall so that it does not perform nat and only does routing between its inside and outside network.

 
0
Comment
Question by:sheikham88
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
  • 2
7 Comments
 
LVL 1

Expert Comment

by:atifawan
ID: 16926759
Use the following command:

nat (inside) 0 0 0

This will pass all IP Addresses on the inside interface to outside without Natting them. If you want to be more specific you can also specify which addresses you do not want to be natted.
0
 
LVL 32

Expert Comment

by:rsivanandan
ID: 16928464
What exactly is the problem right now ? Since if you are using private ip addresses inside and outside interface connected to internet, it will not work.

If you can explain more, we'll be able to understand the problem.

Cheers,
Rajesh
0
 
LVL 1

Expert Comment

by:atifawan
ID: 16928479
He only said he does not want the PIX to nat. He is probably doing NAT on the router and it will work if configured that way.
0
Report: Liquid Web beats Amazon, Rackspace & More

A study by performance analyst firm Cloud Spectator finds that Liquid Web beats rivals Amazon, Rackspace and DigitalOcean when it comes to website and cloud application performance.

 

Author Comment

by:sheikham88
ID: 16928710
yes atif awan is write i am doing nat on the router

to further clarify why i dont want nat to happen on the pix is because i have a dmvpn network for which this router is acting as a primary hub now when i do nat on the pix the public ip address range between the router and the pix is required to be published in all the routers in my dmvpn network which i dont want.

now when i will avoid nat happening on the pix then i will have a complete private ip network on the intranet side i hope i have made my self clear


now atifawan if i give this command on the pix it will not do nat and allow all connections from the outside to the inside interface is this correct
0
 
LVL 1

Accepted Solution

by:
atifawan earned 300 total points
ID: 16928934
If you give this command it will not nat the addresses while going out but it will not allow outside to inside access. The only access that will be allowed is from inside to outside and returning legitimate traffic.

If you want outside to inside access also then you will have to do a static nat on the same range. For example if your internal subnet is 192.168.1.0 then you will configure something like:

static (inside,outside) 192.168.1.0 192.168.1.0 netmask 255.255.255.0

This will allow outside to inside access as controlled by your access-list on the outside interface.
0
 

Author Comment

by:sheikham88
ID: 16929651
one last thing about my question, can i not have any kind of nat on pix to make it work or is it necessary to have some kind of nat to make the pix work as a router and also to have firewall functionality.
0
 
LVL 32

Assisted Solution

by:rsivanandan
rsivanandan earned 200 total points
ID: 16929954
No. That is why I wanted to know what you're trying to do. If it had been only for internal hosts all having public ip then the 'nat 0' command would do. But for your scenario which is clear now take a peek at this post, it is same as yours;

http://www.experts-exchange.com/Security/Q_21888521.html

Cheers,
Rajesh
0

Featured Post

PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Node.js 11 77
DHCP behind catalyst 3750 POE-48 2 77
I am looking for a reliable program to clone servers 5 104
Move WSUS to Server 2016 3 36
Use of TCL script on Cisco devices:  - create file and merge it with running configuration to apply configuration changes
In this article, I am going to show you how to simulate a multi-site Lab environment on a single Hyper-V host. I use this method successfully in my own lab to simulate three fully routed global AD Sites on a Windows 10 Hyper-V host.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.

739 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question