nsca problem

Hello there,

we have a script that checks whether wget works and reports to
netsaint if it does (MSGHOSTNAME is set by the caller):

--------------------------------------------------------------------------------
#! /bin/sh
#

logfile="/var/log/checkwget"
msg="$MSGHOSTNAME\tWGET\t0\t$MSGHOSTNAME wget okay"

# wget output ignored.
/usr/bin/wget  -O /dev/null http://www.spiegel.de
RES1=$?

/usr/bin/wget  -O /dev/null http://www.neuearbeit.de
RES2=$?

if [ $RES1 -eq 0 -o $RES2 -eq 0 ]
then
    echo sending
    echo -e $msg  | /usr/local/bin/send_nsca 172.16.1.17 -c /etc/send_nsca.cfg
else
    echo fail
fi
--------------------------------------------------------------------------------

We run nsca via inetd and hosts.allow contains the line

   nsca: 172.16.0.0/255.255.0.0 

This works for the internal LAN. There are some machines (ISDN/DSL)
that are connected through a tunnel and a firewall. The script works
on one of them but not on the others.

It always says

   sending
   1 data packet(s) sent to host successfully.

The syslog on the netsaint machine contains the entries:

Oct 16 16:20:19 *** nsca[18305]: Handling the connection...
Oct 16 16:20:19 *** nsca[18305]: End of connection or could not read request from client...

The log for the machine that submits successfully is

Oct 16 16:20:01 *** nsca[18294]: Handling the connection...
Oct 16 16:20:03 *** nsca[18298]: Host Name: 'tdslgw', Service Description: 'WGET', Return Code: '0', Output: 'tdslgw 
Oct 16 16:20:02 *** nsca[18294]: End of connection or could not read request from client...

Does anyone know what is happening here?

Best regards,

-- 
+------------------------------------------------------------+
| Marko Riedel, EDV Neue Arbeit gGmbH, [email protected] |
| http://www.geocities.com/markoriedelde/index.html          |
+------------------------------------------------------------+


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