this post was submitted on 25 Nov 2023
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Nginx Proxy manager, Subdomains with CNAME are blocked (alien.top)
submitted 11 months ago by [email protected] to c/[email protected]
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Hi have a home lab setup with Nginx Proxy manager with few CNAMS setup which perfectly works fine.

But I have one issue as my company blocking all CNAME urls as it has wildcard ssl certs. It does allow to open Main URL but not any of the subdomain urls.

mainDomain.com works

sub.mainDomain.com is blocked

With the existing setup can I have additional URLS with port at the end to access the same subdomain backend urls something like mainDomain.com:1234 with the existing nginx proxy manager setup.

sub.mainDomain.com ==> backendIP:1234 ------Blocked

mainDomain.com:1234 ==> backendIP:1234 -----if this can be done with the existing NgnixProxyMamanager?

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[–] [email protected] 1 points 11 months ago

NPM can also do URL proxying: you can reach sub.maindomain.com at maindomain.com/whatever/. Edit the proxy host definition for the main domain and look in the "custom locations" tab.

Alternatively, if you can control your browser's settings, you can try using DNS over HTTPS which can let you bypass your company's DNS. Try using https://dns.quad9.net/dns-query for example as the DNS over HTTPS address (or whatever your browser can offer).