On Fri, 27 Aug 2010, Robert Keyes wrote:
> > > On Fri, 27 Aug 2010, David N. Blank-Edelman wrote: > >> Hi Alex- >> Big Brother's successor, Xymon (formerly Hobbit) at >> http://sourceforge.net/projects/xymon/ may get you closer to what you seek. > > I am going to jump on the bandwagon here and yell 'Xymon!' > > Looking at your earlier idea about checking with ping, I cringed for a > second, but then recovered. But it might be worth mentioning here that > ping is NOT sufficient to see if a host is alive! I have known of an > organization which used ping to see if its servers were alive, but ping > didn't detect when a DoS attack ran the servers out of filehandles causing > all net services to become unavailable, including SSH, without affecting > the ICMP stack. There are multiple degrees of checking a mail server: 0) responds to ping 1) provides the sendmail banner on the SMTP port 2) accepts a message 3) delivers a message (or) 4) delivers a message but discards spam or virus Most other services have similar levels. Dan Feenberg > > _______________________________________________ > bblisa mailing list > [email protected] > http://www.bblisa.org/mailman/listinfo/bblisa > _______________________________________________ bblisa mailing list [email protected] http://www.bblisa.org/mailman/listinfo/bblisa
