[windows2000] SV: Re: 192.168.*.* - why?
- From: "Tom Erdely" <tom@xxxxxxxxx>
- To: <windows2000@xxxxxxxxxxxxx>
- Date: Mon, 18 Nov 2002 18:27:54 +0100
Non-routable is a bit incorrect. We have about 30 different customers,
each with less than 254 hosts, using 192.168.101.x, 192.168.102.x, etc,
and each network is connected and routed to each other.
Generally, routers that are on the internet, are not programed to route
this range of address, but it can be and is done very often in the
workplace. We actually are using RIP v2, and it works spledidly with
both 10.x.x.x and 192.168.x.x.
There are 3 classes of IP addresses reserved for "internal use":
Class A 10.0.0.0 - 10.255.255.255 (10/8 prefix)
Class B 172.16.0.0 - 172.31.255.255 (172.16/12 prefix)
Class C 192.168.0.0 - 192.168.255.255 (192.168/16 prefix)
These are specified in RFC 1918 "Address Allocation for Private
Internets".
http://www.cis.ohio-state.edu/cgi-bin/rfc/rfc1918.html
Hope that helps,
Tom Erdely
http://erdely.no
-----Opprinnelig melding-----
Fra: windows2000-bounce@xxxxxxxxxxxxx
[mailto:windows2000-bounce@xxxxxxxxxxxxx] P=E5 vegne av Rick Fogarty
Sendt: 18. november 2002 15:39
Til: windows2000@xxxxxxxxxxxxx
Emne: [windows2000] Re: 192.168.*.* - why?
Ray,
I believe it's a predefined - non routable number designed for just this
purpose - internal networks. Similar to the 10.0.x.x series I think.
No?
Rick
-----Original Message-----
From: windows2000-bounce@xxxxxxxxxxxxx
[mailto:windows2000-bounce@xxxxxxxxxxxxx] On Behalf Of Costanzo, Ray
Sent: Monday, November 18, 2002 8:59 AM
To: windows2000@xxxxxxxxxxxxx
Subject: [windows2000] 192.168.*.* - why?
Hi list,
I'm just curious about something. It seems that most networks use
192.168.*.* for their internal addresses. Why? It doesn't really
matter, does it? Isn't 192.168.*.* completely arbitrary? My theory on
how this came to be the norm is that MS used those addresses in some
samples in some books or something, and people started using that and it
just became the norm. But then there's that whole Internet connection
sharing feature that came out in what, W98SE? With that, the computer
that's sharing its Internet connection will be 192.168.1.1. So, I
imagine that it's coded somewhere into other OS'es to look to see if
192.168.1.1 can be used as a gateway when the user does not specify an
IP configuration. So what came first? 192.168.*.* or computers looking
to 192.168.1.1 as a gateway? Or what my real question is is why
192.168.*.*?
Thanks,
Ray at work
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