RE: [cobalt-security] Intermittent DNS failure or hack or what??

["Simon Wilson" <simon@xxxxxxxxxxxxx>]

>One way to test what the problem may be is to run this series of test

>1 Ping local machine IP# - verifies LAN network
>2 Ping DNS server IP# - verifies your DNS server is working (one
>provided by ISP)
>3 Ping a URL (www.yahoo.com) - verifies names are being resolved.

>If you can get a response back from 1 and 2, but not 3, its a name
>resolving problem. If you get a response back from all three, its likely
>there's something else going on.

I have checked the DNS entries as per your advice including reverse lookup,
they look OK, we hadn't changed them recently anyway and its been fine for
months.
Pinged everything (whilst it was working and whilst it isn't) everthing
reports
fine, trace route tests on everything again all fine.
Any more ideas anyone???

Thanks
Simon