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[GH-ISSUE #857] support open non standar, low ranges, like 53tcp/udp... #725

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opened 2026-02-26 06:34:09 +03:00 by kerem · 2 comments

kerem commented

2026-02-26 06:34:09 +03:00

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Originally created by @doreks on GitHub (Feb 2, 2021).
Original GitHub issue: https://github.com/NginxProxyManager/nginx-proxy-manager/issues/857

Does anyone know why it is not possible to use the low range ports like 53 or 22...?

Originally created by @doreks on GitHub (Feb 2, 2021). Original GitHub issue: https://github.com/NginxProxyManager/nginx-proxy-manager/issues/857 Does anyone know why it is not possible to use the low range ports like 53 or 22...?

kerem

2026-02-26 06:34:09 +03:00

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kerem commented

2026-02-26 06:34:09 +03:00

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@doreks commented on GitHub (Feb 3, 2021):

hi!

I am getting the following error in the log:
nginx: [emerg] bind() to 0.0.0.0.0:53 failed (13: Permission denied)

it seems to be caused because these ports belong to the protected port range, but how to do then to be able to have a dns proxy, as indicated here;
https://www.nginx.com/blog/load-balancing-dns-traffic-nginx-plus/

@doreks commented on GitHub (Feb 3, 2021): hi! I am getting the following error in the log: `nginx: [emerg] bind() to 0.0.0.0.0:53 failed (13: Permission denied)` it seems to be caused because these ports belong to the protected port range, but how to do then to be able to have a dns proxy, as indicated here; https://www.nginx.com/blog/load-balancing-dns-traffic-nginx-plus/

kerem commented

2026-02-26 06:34:09 +03:00

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@chaptergy commented on GitHub (May 12, 2021):

Since NPM runs in a docker container you can use any port internally. Just map outside port 53 to inside port e.g. 5353, then you can use 5353 in NPM.

@chaptergy commented on GitHub (May 12, 2021): Since NPM runs in a docker container you can use any port internally. Just map outside port `53` to inside port e.g. `5353`, then you can use `5353` in NPM. ![image](https://user-images.githubusercontent.com/26956711/118054770-64960c00-b376-11eb-8248-8f73d68ea984.png)

kerem referenced this issue

2026-02-26 07:38:45 +03:00

[PR #725] [MERGED] v2.7.0 #3287

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