Proxmox guest cannot access Internet

Hi,

Was able to install Proxmox and installed a guest - Ubuntu server
20.04lts.

Issued : sudo apt update and this is the response:

- - -
Err:1 http://archive.ubuntu.com/ubuntu focal InRelease
503 Service Unavailable [IP: 185.125.190.36 80]
Err:2 http://archive.ubuntu.com/ubuntu focal-updates InRelease
503 Service Unavailable [IP: 185.125.190.36 80]
Err:3 http://archive.ubuntu.com/ubuntu focal-backports InRelease
503 Service Unavailable [IP: 185.125.190.36 80]
Err:4 http://archive.ubuntu.com/ubuntu focal-security InRelease
503 Service Unavailable [IP: 185.125.190.36 80]
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
W: Failed to fetch
http://archive.ubuntu.com/ubuntu/dists/focal/InRelease 503 Service
Unavailable [IP: 185.125.190.36 80]
W: Failed to fetch
http://archive.ubuntu.com/ubuntu/dists/focal-updates/InRelease 503
Service Unavailable [IP: 185.125.190.36 80]
W: Failed to fetch
http://archive.ubuntu.com/ubuntu/dists/focal-backports/InRelease 503
Service Unavailable [IP: 185.125.190.36 80]
W: Failed to fetch
http://archive.ubuntu.com/ubuntu/dists/focal-security/InRelease 503
Service Unavailable [IP: 185.125.190.36 80]
W: Some index files failed to download. They have been ignored, or old
ones used instead.
- - -

Same issue as with VirtualBox on Kubuntu 22.04 and Kubuntu 20.04

I do not have this problem when installing VirtualBox on my Win 10
laptop.

I wonder if it is my router...????

I'll take a look.

Any thoughts on how to troubleshoot is much appreciated.

Thanks!!
Keith
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