<tt>nagios-users-admin@lists.sourceforge.net schrieb am 03.05.2006 05:13:58: > #dependent_service_description ^Tun.*-(?:Chattanooga|Midlothian)$ > ... > > The commented line generates errors on pre-flight check. It's almost as > if it cannot handle the alternation (|). Have I mangled the regular > expression or is this a peculiarity of Nagios? Thanks - John Seems as if it is not clear, which flavor of Regex is suported in Nagios, I had a similar problem, and could not find a clear documentation about the regex-suport in Nagios yet.</tt> F.e. [sw][0-9]{3}[a-z]{2,124}\.company\.net This should match any string starting with either s or w, followed by exactly 3 digits and a resonable number of characters plus the domain suffix. But it did not work. May be I am missing some backslashes? Please, can anyone point us to the right place? TIA, Ingo.