Nginx Proxy manager, Subdomains with CNAME are blocked
reddit / selfhosted

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Lower_Ad_2226 · 2023-11-25 21:39

Hi have a home lab setup with Nginx Proxy manager with few CNAMS setup
works perfectly fine.

But I have one issue as my company blocking all CNAME urls as it is
having wildcard ssl certs. It does allow to open Main URL but now any
urls with subdomains.

​

[mainDomain.com](https://mainDomain.com) works

[sub.mainDomain.com](https://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](https://mainDomain.com):1234 with the existing nginx
proxy manager setup.

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AbnormalMP · 2023-11-25 22:40

If the wildcard is the problem you can drop it and get one that
includes the cnames. I was doing it with letsencypt before I started
using wildcard.

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RedditSlayer2020 · 2023-11-25 22:53

Please elaborate, you are not telling the full story

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Lower_Ad_2226 · 2023-11-25 23:06

Simply put, I can use just main domain name which takes me to ngoni
proxy manager page, but non o the other subdomains I can use in office
as those are blocked.

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Lower_Ad_2226 · 2023-11-25 23:11

I am just guessing wildcard is the issue as the main domain url works
taking me to magic proxy page.. I have 2 more simple website with
subdomain mapped which is being blocked.

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RedditSlayer2020 · 2023-11-25 23:16

Build a tunnel/vpn and access your proxy manager that way.

Or just ask your EMPLOYER why they don't let you access your homelab
while you are at work ....

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GolemancerVekk · 2023-11-26 09:52

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).