> For private TCP/IP networks that are indirectly connected to the
> Internet by using a network address translator (NAT) or an application
> layer gateway such as a proxy server, the Internet Assigned Numbers
> Authority (IANA) recommends that you use the private IP
> addresses shown
> in the following table.
>
> Private netID Subnetmask IP Range
> 10.0.0.0 255.0.0.0 10.0.0.1 - 10.255.255.254
> 172.16.0.0 255.240.0.0 172.16.0.1 - 172.31.255.254
> 192.168.0.0 255.255.0.0 192.168.0.1 - 192.168.255.254
>
> Numbers in these ranges are reserved by IANA for private use on TCP/IP
> networks and are not used on the Internet
> </WINDOWS HELP>

For those of you who connect through to jetstreamgames instead of using your
jetstart/jetstream account (to avoid bandwidth charges/capping), you may
notice that you get one of those globally unroutable addresses (something in
192.168.x.y) on your DSL modem. This may cause issues when you're setting up
a firewall, since a common rule is to deny everything that appears to be
coming from a private network range through your modem. This stops
source-spoofed packets that appear to come from a host on your LAN, but are
in fact from outside.

So if, like me, you had a rule blocking all 192.168.0.0/16 traffic coming in
off the DSL modem, you may find it a little hard to play CounterStrike via
JetstreamGames.

Geoff.

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Received on Wed Oct 3 16:42:14 2001