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 From:  "Chris Breish" <cbreish at pchelpservice dot com>
 To:  "'Dave Warren'" <maillist at devilsplayground dot net>, <m0n0wall at lists dot m0n0 dot ch>
 Subject:  RE: [m0n0wall] Slightly OT: "Safe" IP ranges?
 Date:  Mon, 21 Mar 2005 07:21:03 -0500
I've seen Checkpoint's Safe@Home products use 192.168.10.x.  I've also seen
192.168.254.x used, but I don't recall the brand.
Have you considered something in the 172.16.0.x to 172.31.255.x range?

Chris Breish

-----Original Message-----
From: Dave Warren [mailto:maillist at devilsplayground dot net] 
Sent: Monday, March 21, 2005 5:40 AM
To: m0n0wall at lists dot m0n0 dot ch
Subject: [m0n0wall] Slightly OT: "Safe" IP ranges?

This is perhaps slightly OT, but does anyone know of any "safe" /22s I 
can use in 192.168/16?

By "safe" I mean ranges that are unlikely to exist in SOHO grade 
products by default.

The problem I'm running into is that I travel with my laptop and when 
I'm at a customer's site and I VPN into my office LAN, I'm unable to 
communicate with the customer's internal LAN resources since the IP 
range conflicts with my VPN and the VPN takes priority.

Obviously without getting my own block of IPs I can never guarantee I 
won't run into problems, but I thought I'd move my internal network to a 
/22 that isn't used elsewhere.

FWIW I'm actually running a couple separate networks in /24s, but it 
makes life easier to find a contiguous /22 that I can carve up 
internally rather then dealing with multiple /24s in firewall rules.

I've discovered that 192.168.0./24 192.168.1/24 192.168.50/24 
192.168.100/24 and 192.168.200/24 appear to be frequently used.  Any 
body know of any others that are used by default by any common SOHO 
firewall products?

10/8 is out of the question as I VPN into a site that uses 10/8

Thanks in advance for any feedback or suggestions.

-- 
No Sprinkles.  For every sprinkle I find, I shall kill you.
 -- Stewie




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