Regex Editor & Tester

This regular expression matches specific hostnames associated with ESET's Web and Parental Control modules, such as "h1-arsp01-v.eset.com" or "h5-arsp02-v.eset.com". It is typically used in DNS filtering, network monitoring, or firewall rules to track or manage traffic going to ESET's servers. Note that the character classes `[1,3,5]` and `[1,2]` will also technically match a literal comma.