WHOIS
The first and foremost thing that you should be checking is the whois information of your domain. This allows you to confirm if the domain is still active and not expired. There are a lot websites out there that allows you to check the whois information of your domain, where you can cross-check your domains expiry date. http://who.is/ is a good one.
If the domain shows as expired, you should get in touch with your registrar to get it renewed right away.
NAMESERVERS
If the domain had expired, after which you renewed it, please make sure they still point to our nameservers. Some registrars reset the nameservers of expired domains. DNS changes are not instant and incur a propagation delay of 24-48 hours.
A whois check also pulls up the nameservers with which your domain is registered. If you haven't purposefully set otherwise, your domain should be pointing to the following nameservers:-
ns1.kubeservers.co.uk
ns2.kubeservers.co.uk
If you are using third party DNS services that your registrar provides, please make sure you check their domain management area to confirm the domain is pointing to the correct IP address on our server.
DNS
Whether the domain uses our nameservers or your registrars nameservers who manages your DNS zone for you, ultimately the domain should be resolving to the servers IP address. You can check this through any of the DNS tools or websites available out there. http://www.intodns.com/ is one of the websites we normally use. As long as you have entries for WWW, and an A record in there that points to our IP address, you can confirm the DNS part it good.
CDN
If you have CDNs enabled, for troubleshooting purpose, you can always try disabling the CDN. That way, the domain should resolve to the actual server, and the admins will have relevant entries in the servers log files in order to investigate the case in detail. Once the problem with the website is sorted, you can always turn back on the CDN on your website.
CHECK IF THE WEBSITE IS DOWN GLOBALLY, OR IS IT JUST YOU?
We've had multiple instances when customers feel their website is not working, but mostly it's just that the website is not accessible from their specific computer, while it is available globally.
You can check if your website is down globally, by accessing it through a proxy website like anonymouse.org or the website - http://downforeveryoneorjustme.com/ - that checks if the website is down just for you or for everyone else.
If the website is down only on the computer on which you are currently logged on, it's a case of your IP address being blocked on the server firewall for some reason. You can simply login to your client area and open a ticket with us to check.
If it's your developers or customers or friends IP address that got blocked, you can simply ask them to access - https://www.whatismyip.com/ - and let us know the IP address that shows up there. Our support team would then unblock that IP address for you.
