Regex Tester & Validator

This regex matches specific subdomains under `eset.com`, including `banner`, `ipm`, `trace`, `edf`, `versioncheck`, `iploc`, `pki`, `proxy`, `proxy-detection`, and `h1`/`h3-weblb01-v`. It is useful for network monitoring, DNS analysis, or firewall rules to identify traffic related to ESET antivirus and security services. The pattern is anchored to match the entire domain name and uses case-insensitive matching.