Hi all, the suport for regex in Nagios is really a great feature - thanks a lot for implementing it. I am wondering, which multiplyers are supported when refering to hostnames using regular expressions. F.e. [sw].*\.company\.net will match s033dc.company.net If I would like to be more specific I would write [sw][0-9]{3}[a-z]{2,124}\.company\.net This sould match any string starting with either s or w, followed by exactly 3 digits and a resonable number of characters plus the domain suffix. Seems as if Nagios does not understand this form. I could not find a clear documentation, which flavor of regex is supported. TIA, Ingo.