On 21 Dec 2009, at 19:40, Andy Shellam wrote:

>> Both at home and at work there are caching DNS on the LAN. So a DNS
>> request may come back with a valid IP address when the WAN connection is
>> down. I still won't be able to connect to the remote site.
> Dig an external server - e.g. dig @a.root-servers.net google.co.uk
> If your net is down the query will fail even if the reply is cached locally, 
> because you're specifically requesting a response from a.root-servers.net.

I'm confused... what's the problem with just trying to hit the update server? 
If you can then you check for updates, if not then you, erm, don't. Simples, no?


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