I was getting HTTP error 504 while trying to open this site. The problem was strange in the sense that the same sites that were able to open in the morning were not opening post even
ing. First I tried taking help from Google, found this CheckUpDown. None of the solution provided there could help. Tracert clearly indicated that trouble lies with web host as the path was getting aborted at the web host’s end. So,had a rapid mail exchange with the web host.
In the last mail they pointed out to check with the ISP (Internet Service Provider). To my surprise that turned out to be the culprit. Within two days my ISP solved the problem that was lurking around for more than 2 weeks.
Now you know whom to contact, the next time you see HTTP 504.
Ankur Jain is a Software Engineer in Test Automation. After a 5 years stint with Accenture and Oracle, he started his eLearning company. A long-time blogger and proud owner of the "Learn" series of websites. 
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