[LINK] technical question: security alert

[Kim Davies]

Quoting Steven Clark on Thursday March 05, 2009:
| 
| ... this is because those addresses [10.*.*.*, 8.*.*.*, 176.16.*.*, 
| 176.20.*.*, etc] are commonly assigned by routers to computers *inside* 
| an intranet (aka behind the router's firewall). they are a real ip 
| addresses, but are not generally used on the internet. there are a 
| number of ip address blocks reserved for specific purposes [127.0.0.1 
| being the most obvious, aka a pointer back to the machine the software 
| is running on, aka 'home']

Just by way of clarification - the blocks of IPv4 addresses used within
internal networks without delegation by a regional Internet registry
are:

    10.0.0.0     - 10.255.255.255
    169.254.0.0  - 169.254.255.255
    172.16.0.0.0 - 172.31.255.255
    192.168.0.0  - 192.168.255.255

Anyone using 8.*, or some others seen in the wild (5.*, 1.*) WILL have
problems. If they are not already assigned they will be soon by IANA to
other organisations and you will have routing problems.

kim