# \[Docker\] cannot access NC internally when using reverse proxy

**URL:** <https://help.nextcloud.com/t/docker-cannot-access-nc-internally-when-using-reverse-proxy/40700>\
**Category:** 📦 Appliances (Docker, Snappy, VM, NCP, AIO)\
**Tags:** docker\
**Created:** [November 6, 2018, 11:31pm UTC](https://help.nextcloud.com/t/docker-cannot-access-nc-internally-when-using-reverse-proxy/40700 "2018-11-06T23:31:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![mariomare22](https://help.nextcloud.com/letter_avatar/mariomare22/32/5_5575768a8748004e209b776fc1b2916d.png) [@mariomare22](https://help.nextcloud.com/u/mariomare22)\
**Post date:** [November 6, 2018, 11:31pm UTC](https://help.nextcloud.com/t/docker-cannot-access-nc-internally-when-using-reverse-proxy/40700/1 "2018-11-06T23:31:42Z")

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The issue you are facing:

for the installation I have used these two containers and my domain.:

> **[evertramos/docker-compose-letsencrypt-nginx-proxy-companion](https://github.com/evertramos/docker-compose-letsencrypt-nginx-proxy-companion)**
>
> Automated docker nginx proxy integrated with letsencrypt. - evertramos/docker-compose-letsencrypt-nginx-proxy-companion

  

> **[evertramos/docker-nextcloud-letsencrypt](https://github.com/evertramos/docker-nextcloud-letsencrypt)**
>
> Automated docker nextcloud for nginx proxy (webproxy) integrated with LetsEncrypt - evertramos/docker-nextcloud-letsencrypt

From external network (VPN, 4G) everything works fine in https.

when i try to connect to the IP or the hostname of the machine i get:

for https: `400 Bad Request`  
for http: `503 Service Temporarily Unavailable`

if it helps:  
Router is a MikroTik  
Docker host is Ubuntu Server 18.04

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**Author:** ![wwe](https://help.nextcloud.com/user_avatar/help.nextcloud.com/wwe/32/72963_2.png) [@wwe](https://help.nextcloud.com/u/wwe)\
**Post date:** [December 4, 2024, 8:11am UTC](https://help.nextcloud.com/t/docker-cannot-access-nc-internally-when-using-reverse-proxy/40700/2 "2024-12-04T08:11:30Z")

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**Author:** ![wwe](https://help.nextcloud.com/user_avatar/help.nextcloud.com/wwe/32/72963_2.png) [@wwe](https://help.nextcloud.com/u/wwe)\
**Post date:** [December 9, 2024, 3:35pm UTC](https://help.nextcloud.com/t/docker-cannot-access-nc-internally-when-using-reverse-proxy/40700/3 "2024-12-09T15:35:31Z")

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