Instructions

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...

Absence of Connected to 8.8.8.8. indicates that your client cannot establish a network connection to a 8.8.8.8 server on port 53.

This is most probably an issue in your network.

NEXT: Try to resolve the issue within your organization.

Check Access To Public Internet

Instructions

Expected Success Output

Expected Failure Output