I generated 16 character (upper/lower) subdomain and set up a virtual host for it in Apache, and within an hour was seeing vulnerability scans.

How are folks digging this up? What’s the strategy to avoid this?

I am serving it all with a single wildcard SSL cert, if that’s relevant.

Thanks

Edit:

  • I am using a single wildcard cert, with no subdomains attached/embedded/however those work
  • I don’t have any subdomains registered with DNS.
  • I attempted dig axfr example.com @ns1.example.com returned zone transfer DENIED

Edit 2: I’m left wondering, is there an apache endpoint that returns all configured virtual hosts?

Edit 3: I’m going to go through this hardening guide and try against with a new random subdomain https://www.tecmint.com/apache-security-tips/

  • fizzle@quokk.auEnglish
    7·
    2 days ago

    All the obvious things have been mentioned.

    The only way to identify the problem is to share the exact steps youve followed and then others can reproduce.

    Based on what youve told us, no one knows how the subdomain is leaked. Without meaning to be derisive, that suggests that something youve told us isn’t quite correct.

    • BonkTheAnnoyed@lemmy.blahaj.zoneOPEnglish
      8·
      2 days ago

      Well, the good news is that I at least think I’m doing all the right things.

      I’ll spin up a new VM tomorrow and start from scratch.