how to check everything is working

Kevin Miller Kevin_Miller at
Thu Feb 12 18:48:52 GMT 2009

We're using openNMS to monitor our servers and switches.  Works great, but you have to invest the time to set it up.  Probably not much work for just a couple hosts.  Lots of work for dozens of servers, switches, routers etc.  But worth it...

Kevin Miller                Registered Linux User No: 307357
CBJ MIS Dept.               Network Systems Admin., Mail Admin.
155 South Seward Street     ph: (907) 586-0242
Juneau, Alaska 99801        fax: (907 586-4500

From: mailscanner-bounces at [mailto:mailscanner-bounces at] On Behalf Of Eduardo Casarero
Sent: Thursday, February 12, 2009 9:13 AM
To: MailScanner discussion
Subject: OT: how to check everything is working

Hi, i've just had an strange scenario, on one of my servers cent os the I/O controller just stoped working, and all FS went to Read Only. I actually check this:

sendmail online
mailscanner online
disk usage
clamav pattern
ram/swap used
incomming messages waiting

this is reported to a mysql and showed in a webpage.

the problem is that this was working, but the server started rejecting all emails with a 421 error "Can't write to the disk" so all trafic went to the second MTA. so nobody realised that the server was down...

I started a google search and i found this "mailping" but it seems to be a dead project.

so is anyone using something like this? or has any idea?


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