Hello everyone,

I recently recognized that none of my Dockers within a special Network have connection to the Internet, but I can access them through their IP-Adress (Web-Interface, Ping, etc.). I can ensure that the Router-Firewall is not the problem, because virtual machines and dedicated hosts have no problem connecting to the network or the Internet. 

My Docker Containers have a Static IP-Adress on a VLAN I passed to Unraid.

 

Unraid Network Config:

eth0: LAN:    10.1.0.0/16,  Gateway: 10.1.0.1,  Unraid-Server: 10.1.4.1
eth0: VLAN69: 10.10.0.1/24, Gateway: 10.10.0.1, Unraid-Server: 10.10.0.9

 

All Dockers related to this Problem have addresses in the VLAN69 Network
For example: 

Speedtest-Tracker: 10.10.0.40
jellyfin:          10.10.0.17

The Problem:
Speedtest-Tracker can ping jellyfin and vice versa, but neither can ping the gateway, the Unraid-Server or have internet access.
The Gateway can Ping both. 

Everything worked fine till I recently recognized the Issue.

Here you can see my routing table:

 

 

I am glad for any idea what can cause this problem, or ideas how to further investigate this.

MaZe

Hi !

I got a similar issue, but with 2 NIC connected, no VLAN, and both had their default gateway filled so 2 default route.
I've only removed the Default Gateway on the 2nd nic (no internet on that one), restarted all Docker, all of them got internet connexion back.

On your side, I think you are using VLAN. Are you sure that the network 10.10.0.0/24 or 10.1.0.0/16 can reach internet ?

Hope it's help a little bit your issue...

 

KR,