<html><head></head><body> <div dir="auto">Hello everyone,</div><div dir="auto"><br></div><div dir="auto">A tactic to thwart DNS sinkholes is not to have an A record in the domain name and then offer hundreds or more subdomains that can be reached via UDP, and if firewall blocked, via TCP. At least, it’s what I’m facing.</div><div dir="auto"><br></div><div dir="auto">It’s laborious work to identify each subdomain, add firewall rules, host entries etc to then discover its resilience on trying different variations on subdomains hinting at a wildcard setup where any is valid.</div><div dir="auto"><br></div><div dir="auto">I wanted to enquire about the possibility of a wildcard sinkhole to spoof the main domain and all of the subdomains to tackle such scenarios as I’ve didn’t get it to work</div><div dir="auto"><br></div><div dir="auto">Best regards </div><div dir="auto">André Ferreira</div></body></html>