RE: How to enable one-arm routing in PIX

From: Kenneth Wygand (KWygand@customonline.com)
Date: Wed Jan 21 2004 - 00:22:24 GMT-3


Alec,
 
What will you ICMP redirect to? Another router on the same segment? No this won't work.
 
HOWEVER, why don't you change your clients on the segment to point to THAT router as their default gateway, and then enable ICMP redirects on that router. This way, clients that need to send traffic to the Pix will be "ICMP redirected" by the local router to the Pix.
 
Will this work for your application?
Ken

        -----Original Message-----
        From: nobody@groupstudy.com on behalf of Pun, Alec CL
        Sent: Tue 1/20/2004 9:55 PM
        To: dswink@cisco.com; 'Scott Morris'; 'Driessens.Hans'; 'Pun, Alec CL'; ccielab@groupstudy.com
        Cc:
        Subject: RE: How to enable one-arm routing in PIX
        
        

        How about any way to enable icmp redirect in PIX ? I mean on the inside
        interface.
        
        
        -----Original Message-----
        From: Dave Swink (dswink) [mailto:dswink@cisco.com]
        Sent: Wednesday, January 21, 2004 12:18 AM
        To: 'Scott Morris'; 'Driessens.Hans'; 'Pun, Alec CL';
        ccielab@groupstudy.com
        Subject: RE: How to enable one-arm routing in PIX
        
        
        Hans,
        
        Good idea, unfortunately it does not work. The PIX does not allow
        routing in and out of the same PHYSICAL interface. The was my experience
        with it, at least. If someone can make it work, please share.
        
        Dave Swink, CCIE #11678, CISSP
        
        
        -----Original Message-----
        From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
        Scott Morris
        Sent: Tuesday, January 20, 2004 8:27 AM
        To: 'Driessens.Hans'; 'Pun, Alec CL'; ccielab@groupstudy.com
        Subject: RE: How to enable one-arm routing in PIX
        
        
        That would be like multi-fingered routing. :)
        
        -----Original Message-----
        From: Driessens.Hans [mailto:hans.driessens@siemens.com]
        Sent: Tuesday, January 20, 2004 9:03 AM
        To: Scott Morris; 'Pun, Alec CL'; ccielab@groupstudy.com
        Subject: RE: How to enable one-arm routing in PIX
        
        Hi group
        
        since ver 6.3 you can do trunking and make two logical interface on one
        physical interface.... that looks like a onearmed router to me(one-armed
        pix)
        
        cheers
        hans
        
        
        -----Oorspronkelijk bericht-----
        Van: Scott Morris [mailto:swm@emanon.com]
        Verzonden: Tuesday, January 20, 2004 14:49
        Aan: 'Pun, Alec CL'; ccielab@groupstudy.com
        Onderwerp: RE: How to enable one-arm routing in PIX
        
        
        Nope. Once it goes into the PIX on one interface it MUST exit via a
        different interface. Your PIX is a firewall, not supposed to be a
        router!
        :)
        
        Scott
        
        -----Original Message-----
        From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
        Pun, Alec CL
        Sent: Tuesday, January 20, 2004 5:31 AM
        To: ccielab@groupstudy.com
        Subject: OT : How to enable one-arm routing in PIX
        
        Hi group,
        
        Any method to enable one-arm routing in PIX ? It seems PIX by default
        does not allow routing in and out using the same interface, e.g. inside.
        Any way to bypass this restriction.
        
        rgds,
        alec
        
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