I use fping in an embedded system via a shell script that - pings a user settable list of hosts - records 'presence/absence' of a host - determines changes from the previous cycle - notifies me via a SMS sender with a 'human readable' message derived from the hosts list (ie "Level 3 east switch is missing")
NB I also listen for SNMP traps from appropriately cabable devices Fping is in ports /usr/ports/net/fping Murray Taylor Special Projects Engineer Bytecraft Systems P: +61 3 8710 2555 F: +61 3 8710 2599 D: +61 3 9238 4275 E: [EMAIL PROTECTED] -- "Any intelligent fool can make things bigger and more complex... It takes a touch of genius - and a lot of courage to move in the opposite direction." --Albert Einstein > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Alex Zbyslaw > Sent: Friday, 7 July 2006 1:20 AM > To: Paul Hamilton > Cc: firstname.lastname@example.org > Subject: Re: using fping to monitor internet connection status > > Paul Hamilton wrote: > > >Hi, > > > >I need to monitor a number of IP addresses, so that if they > ALL go down > >(say three IP's), then that is a pretty good indication that > my server > >has lost internet connectivity. The most probable cause is > usually the > >ADSL router, and therefore needs a reboot. I was hoping to use the > >'fping' program, but looking through the man file, there > doesn't seem > >to be an exit status on loosing ALL the pings. > > > >If one goes down, I don't care, maybe that server is down, so keep > >pinging the other two etc. > > > >I was hoping to write this in Perl (the first fping example > looked ok, > >until I realised that it would activate when any one IP > address became > >unreachable, which means that I am still connected to the Internet). > > > >Any idea's on a ping tool or simple script? > > > > > > Pseudo code for perl or sh or pretty much any language that > can run commands and determine exit staus: > > Set a variable to 0 > For each server > ping server and if it fails increment variable > End foreach > > If variable == number of servers then all pings failed. > Variable contains number of unsuccessfully pinged servers. > > Or > > Set a variable to 0 > For each server > ping server and if succeeds, increment variable > End foreach > > If variable == 0 then all pings failed. Variable > contains number of successfully pinged servers. > > From sh "ping -c 1 -q host > /dev/null 2>&1" will ping host > and set status with no actual output. > > Never heard of fping. > > --Alex > > > _______________________________________________ > email@example.com mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to > "[EMAIL PROTECTED]" > > ***This Email has been scanned for Viruses by MailMarshal.*** > --------------------------------------------------------------- The information transmitted in this e-mail is for the exclusive use of the intended addressee and may contain confidential and/or privileged material. Any review, re-transmission, dissemination or other use of it, or the taking of any action in reliance upon this information by persons and/or entities other than the intended recipient is prohibited. If you received this in error, please inform the sender and/or addressee immediately and delete the material. E-mails may not be secure, may contain computer viruses and may be corrupted in transmission. Please carefully check this e-mail (and any attachment) accordingly. No warranties are given and no liability is accepted for any loss or damage caused by such matters. --------------------------------------------------------------- ***This Email has been scanned for Viruses by MailMarshal.*** _______________________________________________ firstname.lastname@example.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"