[GH-ISSUE #254] Internal DNS resolution Issue #224

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opened 2026-02-26 06:31:36 +03:00 by kerem · 1 comment

kerem commented

2026-02-26 06:31:36 +03:00

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Originally created by @mspencerl87 on GitHub (Dec 11, 2019).
Original GitHub issue: https://github.com/NginxProxyManager/nginx-proxy-manager/issues/254

I've come to the conclusion posted here
https://forums.unraid.net/topic/76460-support-djoss-nginx-proxy-manager/?do=findComment&comment=797477

That this is and issue with DNS resolution
All containers running under "Bridged" in docker 172.17.x.x

Example
Setting up proxyhosts
http://internalserver:80 -502 Bad Gateway - nginx

Using
http://172.17.0.7:80 - Page loads fine.

docker exec -it NginxProxyManager Sh
nslookup 172.17.0.7 "can't resolve does not resolve (null)
ping 172.17.0.7
PING 172.17.0.7 (172.17.0.7): 56 data bytes
64 bytes from 172.17.0.7: seq=0 ttl=64 time=0.048 ms

Originally created by @mspencerl87 on GitHub (Dec 11, 2019). Original GitHub issue: https://github.com/NginxProxyManager/nginx-proxy-manager/issues/254 I've come to the conclusion posted here https://forums.unraid.net/topic/76460-support-djoss-nginx-proxy-manager/?do=findComment&comment=797477 That this is and issue with DNS resolution All containers running under "Bridged" in docker 172.17.x.x Example Setting up proxyhosts http://internalserver:80 -502 Bad Gateway - nginx Using http://172.17.0.7:80 - Page loads fine. docker exec -it NginxProxyManager Sh nslookup 172.17.0.7 "can't resolve does not resolve (null) ping 172.17.0.7 PING 172.17.0.7 (172.17.0.7): 56 data bytes 64 bytes from 172.17.0.7: seq=0 ttl=64 time=0.048 ms

kerem closed this issue

2026-02-26 06:31:36 +03:00

kerem commented

2026-02-26 06:31:37 +03:00

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Owner

@mspencerl87 commented on GitHub (Dec 11, 2019):

The work around.. Was point to Unraid IP and use custom ports.. Ignoring hostnames...

@mspencerl87 commented on GitHub (Dec 11, 2019): The work around.. Was point to Unraid IP and use custom ports.. Ignoring hostnames...

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starred/nginx-proxy-manager-NginxProxyManager#224

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