monitoring external internet connectivity

Jayson Broughton jbroughton at truecos.com
Tue Jun 30 22:15:42 CEST 2009


Shadhin,

I had our nagios ping google.com for awhile, but if something happens to the
DNS server internally then it gave a false reading saying the internet was
down when it was a DNS issue.  Eventually I figured I could ping my ISP's IP
address instead of hostname, and that seemed to work well.  Im sure a place
like google has more than 1 ip address associated with it, so I would pick
an external IP address of a known site/company and plug it in.  I also have
SMS enabled/setup on my nagios machine so that when the internal network is
down, an SMS message is generated and sent to the techie phones.  (can't get
email if the network is down, eh?)

 

 

Hope this helps,

 

Jayson Broughton

 

 

From: shadih rahman [mailto:shadhin71 at gmail.com] 
Sent: Tuesday, June 30, 2009 1:44 PM
To: nagios-users at lists.sourceforge.net
Subject: [Nagios-users] monitoring external internet connectivity

 

All,
  What is the best way to check if our network has connection to commodity
internet or not.  What I am trying to achieve is to ensure internal network
has connection to Internet.  One thing is to ping google check.  Is this a
good idea or can someone suggest a better way to do this.  Please advise on
this.  Thanks

-- 
Cordially,
Shadhin Rahman


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