this post was submitted on 29 Jun 2025
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Self-Hosted Alternatives to Popular Services

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Is Using Specific Subdomains Safer Than Wildcards with a Reverse Proxy? (old.reddit.com)
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The original was posted on /r/selfhosted by /u/JohnWave279 on 2025-06-28 22:12:29+00:00.

I was wondering what’s safer on DNS:

  • a specific subdomain record

  • or a wildcard

DNS entries are public, so attackers already know exact subdomains and can guess the app behind them. With wildcards, they can only guess and brute force. Also, in my case I use a reverse proxy, so it’s simpler to configure that instead of the DNS server.

What do you think is safer?

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