RE: [fw-wiz] Re: IP aliasing behind a PIX
From: Noonan, Wesley (Wesley_Noonan@bmc.com)
Date: 01/22/03
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From: "Noonan, Wesley" <Wesley_Noonan@bmc.com> To: "'Don Owens'" <don@xlogistics.com>, firewall-wizards@honor.icsalabs.com Date: Wed Jan 22 19:25:02 2003
Maybe I am just missing something here... but why don't you just not use
NAT?
nat (inside) 0
Wes Noonan, MCSE/CCNA/CCDA/NNCSS/Security+
Senior QA Rep.
BMC Software, Inc.
(713) 918-2412
wnoonan@bmc.com
http://www.bmc.com
> -----Original Message-----
> From: Don Owens [mailto:don@xlogistics.com]
> Sent: Wednesday, January 22, 2003 11:28
> To: firewall-wizards@honor.icsalabs.com
> Subject: [fw-wiz] Re: IP aliasing behind a PIX
>
> The problem has been resolved. Thanks to Mike Scher for pointing me to
> the "static" lines in the conf. The intention was to map the entire
> network behind the PIX (1-1 mapping, since the network is public), but
> the entry had a netmask of 255.255.255.255 instead of 255.255.255.224.
> Once I added a line with the correct netmask, the aliases began
> working. However, now I wonder why the main IP on each interface worked
> in the first place ...
>
> Don
>
> On Fri, 2003-01-17 at 18:04, Don Owens wrote:
> > Hi guys,
> >
> > I'm overloading interfaces on Solaris and Linux boxen to have multiple
> > IPs (same network though) behind a PIX firewall. From within the
> > network, the aliases work fine (i.e., the machines are accessible using
> > the aliased IPs). However, when trying to get to them from outside the
> > network, the IPs are unreachable. These are public IPs and the routing
> > works fine for each IP if that IP is the main IP of the box. If I swap
> > the IP of one of the aliases with the main IP, that IP is then
> > reachable. Then the alias works as well until I reboot the PIX.
> >
> > It seems to me this has to be the PIX, as I have not had this problem in
> > the past using access lists on routers as firewalls. Has anyone else
> > seen this problem? Am I missing a simple setting on the PIX or
> > something?
> >
> > Any ideas?
> >
> > Don
> >
> > --
> > Don Owens
> > don@xlogistics.com
> > www.xlogistics.com
> >
> > Express Logistics
> > 48541 Warm Springs Blvd., Ste. 505
> > Fremont, CA 94539
> --
> Don Owens
> don@xlogistics.com
> www.xlogistics.com
>
> Express Logistics
> 48541 Warm Springs Blvd., Ste. 505
> Fremont, CA 94539
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- Next message: Chapman, Justin T: "RE: [fw-wiz] Blocking email through the web services"
- Previous message: Paul Robertson: "RE: [fw-wiz] DHCP in a corporate MS environment - Security Risk?"
- Maybe in reply to: Don Owens: "[fw-wiz] Re: IP aliasing behind a PIX"
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- Reply: Don Owens: "RE: [fw-wiz] Re: IP aliasing behind a PIX"
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