Re: Checking if a host is online

Jason -- ..and then Jason Giangrande said... % % I'm creating an application for an Intranet that, among other things, is % supposed to check to see if particular hosts are online, and if so, what % their IP address is. Anyone know how I can accomplish this? I tried .. % a while to execute for even a few hosts at once. 1) If you're first checking to see if it's alive and second checking for its IP address you are, IMHO, doing it backwards :-) 2) It sounds like you're rewriting BigBrother. Check out bb4.com for info. It absolutely rocks and I wouldn't run a real site[1] without it. 3) At the very least, cut your ping timeout down to the smallest acceptable; in general, a full second is plenty of time to get nearly anywhere on your continent (ain't it great? :-) and so your intranet should be more than happy with that allowance. 4) I know that BB has already beaten this problem, so you should also check there, but there may be a way to ping numerous hosts at once (netping or such). Try some googling. If nothing else, I know that you could whip up a perl script which will fork the load and then run them in parallel and could return the live/dead/notfound results; I don't think that php has forking. [1] My house must therefore by definition not be a real site, but it aspires to be -- and shall whenever I can find some unallocated time :-) HTH & HAND :-D -- David T-G * There is too much animal courage in (play) davidtg@justpickone.org * society and not sufficient moral courage. (work) davidtgwork@justpickone.org -- Mary Baker Eddy, "Science and Health" http://justpickone.org/davidtg/ Shpx gur Pbzzhavpngvbaf Qrprapl Npg!