A few days ago I wrote a blog post about how I could not access the Mt. Gox online bitcoin exchange site. Every time I tried to go to the Mt. Gox online homepage it would redirect me to a 503 error page that read 'Service Temporarily Available' so of course I thought that the site was down. At first I thought it was only a temporary service disruption due to upgrades or high traffic loads. I tried a dozen or so times within a few minutes at first but I still got the same error each time so I decided to try again later. The next day I tried again a few times and still got the 503 error every single time, I thought that something else was going on besides a simple hardware upgrade or software update. I speculated there was a problem because Mt. Gox was being attacked by malicious hackers with a DDoS attack.
I don't know for sure but I don't think that that was the cause of the error. This was a few days ago that I first encountered the error. I have checked it a few times since then and still got the error page every time. That is when I tried a few things to see if the Mt. Gox site was definitely down or not. I finally figured out that if you type in exactly http://mtgox.com (not www.mtgox.com, http://www.mtgox.com, or mtgox.com) that the home page loaded immediately. I have no idea why this is but if you enter the www prefix or if your browser adds the www when you type in only mtgox.com. The only thing I can think of is that there is a problem with the www subdomain or the server that the www subdomain points to. So there you have it, if you are trying to access Mt. Gox and it gives you the same 503 error try entering http://mtgox.com and it should work fine.