Ping Pathping and Tracert

[joelsz]

I have an odd one.
I have two different websites that I own and administer.
Both are on the same server.
Both are functioning completely normal.

Yet, I can not ping, pathping or tracert either of them.
(By name or IP)
They all time out.
All these commands work fine on other sites.

I've tried this on two different computers linked to two different ISPs.

Any ideas why this would be?

As I said, I am not having any problems with the sites, but I am curious.

[joelsz]

I believe I've found my answer.
Acording to Wikipedia

The usefulness of ping in assisting the "diagnosis" of Internet connectivity issues was impaired from late in 2003, when a number of Internet Service Providers filtered out ICMP Type 8 (echo request) messages at their network boundaries.

This was partly due to the increasing use of ping for target reconnaissance, for example by Internet worms such as Welchia that flood the Internet with ping requests in order to locate new hosts to infect. Not only did the availability of ping responses leak information to an attacker, it added to the overall load on networks, causing problems for routers across the Internet.

Evidently this is what my Server (Internet Host) has done.