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Network Security Firewalls
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RE: pix and transparent proxy

Subject: RE: pix and transparent proxy
Date: Mon, 3 Apr 2006 13:12:11 +0100
Firstly for the sake of argument( in this case) the PIX=ASA so that's
not an issue.

The PIX or ASA version 5/6/7 will not do what you want.

The best way to do this is to use WCCP which is a protocol for
redirecting web traffic to transparent proxies, you would need to sit a
router in front of the firewall before the client to do this. Another
way is to use a linux based proxy as a router between the client and
firewall and use IPTABLE to readdress the packets into a local process
such as squid (this only really works for smallish networks thought <50
users)

WCCP is supported by most of Cisco's layer 3 switches so you may be able
to do it that way too.

-----Original Message-----
From: Meidinger Chris [mailto:chris.meidinger@badenIT.de] 
Sent: 03 April 2006 11:21
To: Andrew Shore; A@B.COM; firewalls@securityfocus.com
Subject: RE: pix and transparent proxy

Hi Andrew,

as far as I can tell, you're right. That config has nothing to do with
transparent caching.

Also it's for an ASA and not a PIX :(

Imran: I know of no way that you can use a 501 for transparent caching.
It's got 16 megs of ram, about 11-12 of which is taken when it's on
load. Where should the cached files be stored??

If you are thinking of a setup like:

Client
  |
  |
  |
PIX---Proxy Server
  |
  |
  |
Internet

Where web requests are sent transparently to the proxy server, you can't
do it on a 501. The PIX v. 6.x will *not* turn a packet around on one
interface and route it back out. With only two interfaces on a 501 (one
of which is the 4-port switch) you are out of luck on that one.

Cheers,

Chris 

-----Original Message-----
From: Andrew Shore [mailto:andrew.shore@holistic.it] 
Sent: Friday, March 31, 2006 4:51 PM
To: A@B.COM; firewalls@securityfocus.com
Subject: RE: pix and transparent proxy

This just enables the web interface for all internal users. Whats this
got to do with transpatent proxy? Or have I missed part of 
this thread!

-----Original Message-----
From: A@B.COM [mailto:A@B.COM] 
Sent: 25 March 2006 17:32
To: firewalls@securityfocus.com
Subject: Re: pix and transparent proxy

READ THE MANUAL... :-)
interface Ethernet1 
      nameif inside 
      security-level 100 
      ip address 192.168.1.1 255.255.255.0 
http server enable 
http 0.0.0.0 0.0.0.0 inside


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