Getting a 503 or any HTTP error means that you are getting
through to something that is too busy.
An HTTP error jibes with the usual result of a web site hack
that "takes down" the server.  But it also could be a result of
too many connection attempts.

Not being able to resolve the name indicates something
different than too many users or a web site hack, since the name
information comes from DNS servers which are not on the same network.
Simplifying a lot, the ultimate DNS record comes from the registrar
who places it on the "root servers".

If the root servers no longer have the record, then no one
will be able to resolve the name (modulo local cache timeouts, usually of
a day or so).

ALJAZEERA.NET is registered by networksolutions.com (Verisign), who
also control most of the root servers as well.
Two days ago, ALJAZEERA.NET resolved to an IP address that
had a web server on it.  Yesterday, it couldn't be resolved.
Today it points to 216.34.94.186.

216.34.94.186 appears to belong to a Cable & Wireless IP block.
A traceroute ends at a CW router that is probably somewhere
in America:

 9  p0-0-0-1.rar1.sanjose-ca.us.xo.net (65.106.1.65)  4.936 ms  9.793 ms  4.802 ms
10  p0-0.ir1.paloalto-ca.us.xo.net (65.106.5.194)  5.489 ms  5.389 ms  5.461 ms
11  bpr2-so-6-0-0.paloaltopaix.cw.net (206.24.241.213)  5.398 ms  15.071 ms  5.223 ms
12  agr2-loopback.santaclara.cw.net (208.172.146.102)  5.680 ms  5.569 ms  5.802 ms
13  dcr2-so-7-1-0.santaclara.cw.net (208.172.156.185)  7.210 ms  5.810 ms  7.434 ms
14  acr1-loopback.seattle.cw.net (208.172.82.61)  23.783 ms  26.939 ms  23.587 ms
15  bhr1-pos-0-0.tukwilase2.cw.net (208.172.83.130)  24.920 ms  24.461 ms  24.630 ms
16  csr11-ve240.tukwilase2.cw.net (216.34.64.34)  25.067 ms  24.883 ms  24.769 ms
17  * * *
18  * * *


They could have picked a bad time to move servers and be doing it
incompetently.  Hackers could have spoofed Verisign into changing
their DNS record, and have broken into router control networks
to break their routing.  Or the US government could be ordering
Verisign and CW to make ALJAZEERA.NET unavailable.

Eric

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