Why does VPN connection fail?

Related questions

1. Can router block VPN?
2. What are VPN protocols?
3. What two types of tunneling are supported by PPTP?
4. What does Pptp use for encryption?
5. What port does PPTP VPN use?
6. What type of VPN is NordVPN?
7. What VPN protocol does NordVPN use?
8. What encryption does VPN use?
9. Which is better OpenVPN or PPTP?
10. What is VPN passthrough?

Tags

1. #connection
2. #whilst
3. #troubleshooting
4. #begin
5. #failures
6. #something
7. #verify
8. #following
9. #disconnected
10. #pinging
11. #caused
12. #address
13. #website
14. #servers
15. #check
16. #before
17. #internet
18. #blocked
19. #please
20. #working
21. #blocking
22. #loading