Ok, but what can I "send" and "receive" to/from the host?
I also tried old version of check_udp (that does not need any string), but I read : No data was recieved from host! No response from host on port XX Or simply: No response from host on port XX I see another strange situation. On port 161 I can use check_snmp (work correctly), but if I use check_udp on port 161 it does not work at all ! How can be possible ? Regards -----Messaggio originale----- Da: Andreas Ericsson [mailto:a...@op5.se] Inviato: martedì 3 settembre 2013 15:54 A: Nagios Users List Cc: Marco Borsani Oggetto: Re: [Nagios-users] check_udp error message On 2013-09-03 12:33, Marco Borsani wrote: > Hi all > > I need to control many UDP ports. > > > > I run the command: > > ./check_udp H <IP_ADDRESS> p 88 > > > > I receive following error message (with state UNKNOWN) : > > With UDP checks, a send/expect string must be specified > > > > Can anyone help me to solve it? > > Those parameters should be optional.. > UDP is a connection-less protocol. The "expect" string could indeed be optional, and we could just expect to get something at all back when we send something, but without sending anything we won't even touch the network, so the remote host has no idea that we're trying to talk to it and we won't know if the port is up. That's why "send", at least, is not optional. -- Andreas Ericsson andreas.erics...@op5.se OP5 AB www.op5.se Tel: +46 8-230225 Fax: +46 8-230231 Considering the successes of the wars on alcohol, poverty, drugs and terror, I think we should give some serious thought to declaring war on peace. ------------------------------------------------------------------------------ Learn the latest--Visual Studio 2012, SharePoint 2013, SQL 2012, more! Discover the easy way to master current and previous Microsoft technologies and advance your career. Get an incredible 1,500+ hours of step-by-step tutorial videos with LearnDevNow. Subscribe today and save! http://pubads.g.doubleclick.net/gampad/clk?id=58041391&iu=/4140/ostg.clktrk _______________________________________________ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null