Using check_udp

Nagios Nagios Plugins support
1

Hi - has anyone successfully got check_udp working? I’m trying to use check_UDP (nagios-plugins 1.4.5) 1.80 but it keeps asking for a send/expect string and I’ve no idea what this is meant to be?

The target server is running syslog and the check so far has just been failing with this:

/opt/tools/libexec/check_udp -H 192.168.75.131 -p 514
With UDP checks, a send/expect string must be specified.

So I guess my question is simply what should the following be set to:

–send=STRING
–expect=STRING

Thanks - Julian.

2

try this: mail-archive.com/nagios-user … 25450.html

3

Hi - yes, I should have said I’ve had a look around for this same problem and not found a great deal out. If I just pass some random string of text the check then times out.

/opt/tools/libexec/check_udp -H 192.168.75.131 -p 514 -s ‘xyz’ -e ''
CRITICAL - Socket timeout after 10 seconds

Julian.

4

no idea, just tried it quickly and it doesn’t work… i only use check_tcp at this time…

5

right …

well from what I can tell the general consensus is that check_udp is completely pointless as it doesn’t work.

Maybe I can figure it out.

6

sounds somehow strange… if it wouldn’t work it wouldn’t be in the plugins package… (at least i wouldn’t publish it :smiley: )

Should you find out anything please let us know :smiley:

7

rather than using check_UDP

you can use the UDP information in check snmp command and their OID

./check_snmp -H 10.0.0.254 -C public -o udpInDatagrams.0 -w 100000 -c 105000 -r 1 -m RFC1213-MIB

Cheers
Ammar Pakistan