Can not fetch or ping some hosts

[Jensemann]

Hi!
We have a wierd DNS-problem with our server.

Some domains can not be fetched nor pinged from the server. The host is not found. SSH ping says "host unknown", php sier says:

Warning: main(): php_network_getaddresses: getaddrinfo failed: Name or service not known in /home/danfri/domains/filmverden.com/public_html/fetch.php on line 9

Warning: main(http://filmverden.com): failed to open stream: Success in /home/danfri/domains/filmverd

There seems to be no connection with which of the adresses that fails or works.

Even our own hosted domains gives the same error.

We can not find anything suspicious in the logs. The zone-files are unchanged since the 6th, and the problems started late last night CET.

All hosts are accessible elsewhere, and they should work.


Thanks in advance for any advice,

Jensemann
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EDIT: Also causes mails not to be sendt out to all hosts:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

[email protected]
Unrouteable address

 

[nobaloney]

Can you use your built-in resolver to find the IP#s for these hosts?

# nslookup host.example.com

If that doesn't work, then you've got a resolution problem on your system.

Jeff