# Internet access error

**URL:** <https://vaultwarden.discourse.group/t/internet-access-error/1364>\
**Category:** Help\
**Created:** [January 5, 2022, 12:36pm UTC](https://vaultwarden.discourse.group/t/internet-access-error/1364 "2022-01-05T12:36:26Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Nico](https://avatars.discourse-cdn.com/v4/letter/n/b5a626/32.png) [@Nico](https://vaultwarden.discourse.group/u/Nico)\
**Post date:** [January 5, 2022, 12:36pm UTC](https://vaultwarden.discourse.group/t/internet-access-error/1364/1 "2022-01-05T12:36:26Z")

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Hello everyone,

I currenlty run vaultwarden on a Synology Nas, using docker.  
It is really a powerful solution with lof of features.

I am facing one issue regarding Internet access.  
In the Diagnostics menu of Admin console, both “Internet access” and “DNS ([github.com](http://github.com))” are in Error.  
I think I did something wrong in the configuration.  
I can acces to the web admin, end user webUI, also to the mobile app.  
The only thing which is not working is the server to connect to Internet.

Here are the details of my installation :

- running on Synology docker (local port : 8480, container port : 80)
- running behind a reverse proxy (hosted on the Synology Nas) :
  - source protocol https
  - source host : bitwarden . mydomain . com
  - source port : 443
  - destination protocol : http
  - destination host : localhost
  - destination port : 8480

- Vaultwarden settings (that were changed regarding default settings) :
  - domain url : [https://bitwarden](https://bitwarden) . mydomain . com

You can find below the screenshot of the errors…

 ![vw diag](https://global.discourse-cdn.com/free1/uploads/vaultwarden/original/1X/4bcbaab9a0a2c146f2d65e619096772545ac6078.png)

Can anyone help me to find what is going wrong ?

Many thanks !

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**Author:** ![cksapp](https://avatars.discourse-cdn.com/v4/letter/c/b9e5f3/32.png) [@cksapp](https://vaultwarden.discourse.group/u/cksapp)\
**Post date:** [January 5, 2022, 6:37pm UTC](https://vaultwarden.discourse.group/t/internet-access-error/1364/2 "2022-01-05T18:37:17Z")

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This may be a firewall related issue in the Synology NAS

See this post

> [@In "Vaultwarden Admin Panel" Diagnostics does not work](https://vaultwarden.discourse.group/t/in-vaultwarden-admin-panel-diagnostics-does-not-work/1172/7):
>
> I would like to take up this topic once again… After some testing on my network and some internet research I was able to solve the problem without compromising the security of my NAS. But from the beginning: Beyond the problem, described at the beginning of this thread (Diagnostic does not work), logging into the Vaultwarden Web Vault with the Yubikey as second factor also stopped working with the firewall configuration below: Rule 1 =\> ALL-ALL =\> xxx.xxx.xxx.xxx (my fixed IP) =\> Allow. Rule…

It may help

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**Author:** ![Nico](https://avatars.discourse-cdn.com/v4/letter/n/b5a626/32.png) [@Nico](https://vaultwarden.discourse.group/u/Nico)\
**Post date:** [January 6, 2022, 2:55pm UTC](https://vaultwarden.discourse.group/t/internet-access-error/1364/3 "2022-01-06T14:55:35Z")

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thanks, it was a firewall issue.

I had to allow 172.17.0.0/16 to connect to any (outgoing)

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**Author:** ![esm1060](https://avatars.discourse-cdn.com/v4/letter/e/f6c823/32.png) [@esm1060](https://vaultwarden.discourse.group/u/esm1060)\
**Post date:** [April 12, 2025, 4:01pm UTC](https://vaultwarden.discourse.group/t/internet-access-error/1364/5 "2025-04-12T16:01:26Z")

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The solution from Nico (allow 172.17.0.0/16 on the NAS firewall) then as last firewall rule deny everything) worked also for me. Tks!