Nagios help with a Linux server

Hello Experst,

I am trying to clear out Nagios critical errors from a Debian server.

I am not sure where to begin looking.

I thought it was a DNs entrie, not sure anymore...

I found the entry in Nagios pointing at something for another ISP not the one we use now.

Here ate the Errors in Nagios in a screenshot:

 Any helpful comment on this much appreciated.
marceloNYCMiddle-Tier AdministratorAsked:
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Sanga CollinsSystems AdminCommented:
Check_NRPE service is unable to complete the ssl handshake between nagios and the machine named NS1. There is probably nothing wrong with that server.

You will need to connect to NS1 and trouble shoot the NRPE setup

You can use the following document:

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Seth SimmonsSr. Systems AdministratorCommented:
you can also use -n with your check_nrpe command if you are not using SSL
marceloNYCMiddle-Tier AdministratorAuthor Commented:
I am okay now with everything except this one:

SMTP CRITICAL       2015-06-26 14:07:58       64d 5h 5m 18s       4/4       Connection refused
Sanga CollinsSystems AdminCommented:
Server NS1 is not allowing SMTP connections (port 25) if that server is not supposed to allow port 25, then you can remove the check. If it is supposed to allow SMTP connections, then that server will need some trouble shooting.
marceloNYCMiddle-Tier AdministratorAuthor Commented:
Thank you so much for your help.
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