RE: Internet Connection Sensor

["ibm" <ibm@xxxxxxxxxx>]

Ping would be unreliable.  It doesn't guarantee that the service is up.
If any checking is to be done it needs to be at the layer that the
service runs on (eg. TCP / HTTP / etc).  even then your application
should be aware when a TCP connection breaks and handle the failed
transaction then.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of rob@xxxxxxxxx
Sent: Wednesday, January 20, 2010 10:35 AM
To: Midrange Systems Technical Discussion
Subject: Re: Internet Connection Sensor

In CL you could do
PING       RMTSYS('NRA.ORG') MSGMODE(*QUIET *ESCAPE) 
MONMSG     MSGID(TCP3210 TCP3202 TCP3213) EXEC(GOTO CMDLBL(ALERT))
If that fails, grab your guns and head for the woods.  :-)
Caution:  Some sites block pings.

I know jack about sockets programming but couldn't you open a socket to 
the target and see if they are up?


Rob Berendt