Check access to public internet

Following instruction on this page you can test if your host has accses to the public internet.

On the host that runs your service run the next command:

echo quit | timeout 3 telnet 8.8.8.8 53

The above command will try for three seconds to connect to a commonly known named server hosted by google (port 53 is the default port for DNS services).

TIP: If google services are not available in your organisation, please pick a suitable alternative IP address port pair. In the UK echo quit | timeout 3 telnet 1.1.1.1 53 is probably a good pick IF you are not limited to N3/HSNC. 1.1.1.1 is cloudflare managed domain server.

Expected success output

Trying 8.8.8.8...
Connected to 8.8.8.8.
Escape character is '^]'.
Connection closed by foreign host.

This means that your machine can establish a network connection to a google server on port 53.

Expected failure output

Trying 8.8.8.8...

This is most probably an issue in your network.