Servers pingable, but not found thru FTP/BROWSER/SSH?

Has anyone ever come across this problem?

We have 4 different servers at an ISP (won't say which). Intermittently throughout the day, they will be inaccessible thru the web browser (server not found), nor can I get to them via FTP or SSH. BUT I can ping them and tracert looks fine.

I have compared the tracert info when it was "down" and "up" and they look identical.

Any ideas? ISP claims all is fine on their end, but when this happens, I cannot access their other customers' boxes, either.

Is it my DSL ISP?

Thx in advance...
Jennifer.

 

 

 

 

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