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Network Security Firewalls
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Re: Single public ip address

Subject: Re: Single public ip address
Date: Tue, 22 Feb 2005 19:24:44 +0100
If you're able to manage a unix system, I suggest OpenBSD/PF/IPsec. I'm using it on several firewalls, each with many legs (10+) using gigabit networking, tied together with IPsec associations, doing nat and bi-nat. It's Open Source, independently audited, kicks any appliances ass, and cost you 0$ for the software. You can use CARP for redundancy and load balancing setups, etc. More power under the hood than you'll be able to put to use...

Also... if you're really paranoid when it comes to security, beware of huge security corporations that resides in "Big Brother" type of countries....

Fredrik Widlund

Andrew Shore wrote:

Simple answer is yes. But you haven't said what firewall you are using.

PIX, CISCO FW IOS and checkpoint will do this if you need to know how I
have configs for these devices.

This is often known as interface address overloading.

HTH

Andy

-----Original Message-----
From: Kelvin Tarver [mailto:ktarver@fitnc.com] Sent: 17 February 2005 09:36
To: firewalls@securityfocus.com
Subject: Single public ip address




Is there a way to have a single ip address do the following:

1)Function as the outside interface of a firewall.
2)Use that same public ip address, and outside interface to function as
a vpn server.
3) Have the same public ip address PAT to a public web Server on the
dmz.

The goal is to have the outside interface of a firewall, vpn server, and
a public webserver to share the one public ip address.

Is this possible?  I'm convienced it isn't possible, but I might be
missing something.  Any insight on this issue would be greatly
appreciated.

Thanks.





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