Grafana can't connect when use VPN (Secure Connection Failed / connection reset by peer)

Grafana Configuration
1

  • What Grafana version and what operating system are you using?
    9.5.1

  • What are you trying to achieve?
    I am running Grafana on an Ubuntu VM. I have configured Grafana to use https following these notes

  • How are you trying to achieve it?

Here is my server configuration entries from /etc/grafana/grafana.ini

[server]
protocol = https
http_port = 3000
domain = xxx.yyy.cloudapp.azure.com
enforce_domain = False
root_url = https://xxx.yyy.cloudapp.azure.com:3000
cert_file = /etc/grafana/grafana.crt
cert_key = /etc/grafana/grafana.key

When I am not using VPN, I can access Grafana with no problems.

This is what I can see in the Grafana Service Logs when I try to access Grafana over VPN

root@grafana-vm:~# journalctl -u grafana-server.service -f
-- Logs begin at Thu 2023-08-17 01:15:30 UTC. --
Aug 22 11:29:08 grafana-vm grafana[1599]: server.go:3217: http: TLS handshake error from x.x.x.x:46576: read tcp z.z.z.z:3000->x.x.x.x:46576: read: connection reset by peer
Aug 22 11:29:08 grafana-vm grafana[1599]: server.go:3217: http: TLS handshake error from x.x.x.x:36814: read tcp z.z.z.z:3000->x.x.x.x:36814: read: connection reset by peer

With x.x.x.x my laptops public IP and z.z.z.z the private IP of the VM

For some reason, the application/server is not accepting the Client hello packet when on VPN.

Is there something that I need to change in my Grafana config to resolve this issue ?

2

Turns out there was a firewall setting in the VPN provider, that was dropping packages to non standard ports.