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macboy:
For a while, I got the bad gateway message trying to load any page on the site. I thought that maybe my employer had blocked it or something. It turned out to be cookies. Gentlemen, clear your cookies for eevblog.com.

fillermark:
Bad gateway refers to http error 502 which is mean that a server which is try to fulfill the client request received an invalid response from upstream server. It  is often a network error between servers on the internet, meaning the problem wouldn't be with your computer or internet connection. Empty or incomplete headers or response body typically caused by broken connections or server side crash can cause 502 errors if accessed via a gateway or proxy.  Since it's just a generic error, it doesn't actually tell you the website's exact issue.

How to Solve 502 Errors

Perform a hard-refresh in your browser. On Macs, this is done by pressing Cmd + Shift + R.

Clear your browser cache and delete cookies. Your browser may be holding on to certain files that were saved once you visited the website with a 502 error.

Change your DNS servers. If you’ve never changed them in the past you likely still have the default servers assigned to you by your ISP, try using open DNS servers such as Google's Public DNS.

Finally, restart your computer/networking equipment. Some temporary issues with your computer and how it's connecting to your network could be causing 502 errors, especially if you're seeing the error on more than one website. In these cases, a restart would help.

mark03:
Funny thing is, I get these "502 bad gateway" errors *all the time* with this site (not on specific URLs like the OP, just generally).  By that I mean that I run into them at least 3-4 times/year, and usually when I do, the forums are unusable and I just have to come back in several hours or a day.  I don't think I have ever encountered a similar error on any other web site.  So all this stuff about cookies, caches, proxies, etc. is interesting, but clearly there is something weird about eevblog.

Maybe it's Oz... left-handed vs right-handed electrons in the southern hemisphere?

tebbybabes:
Hello.  I just wanted to report that I was experiencing this error for most of yesterday on multiple devices. 

I haven't changed anything and it's back to working now.  Judging by the timestamps of replies on the posts that I've been reading, obviously those posters had no problem accessing the site.  :-//

Just thought I should add more anecdotal experience, in case anyone can make heads or tails of it.

Addendum - Just read a thread on bug reports. Apparently the forum experienced a DDOS attack. I guess that explains my experience yesterday.

Ranayna:
See here: https://www.eevblog.com/forum/chat/website-error-reports/msg2843206/#msg2843206 (the topmost stickied post)

Interesting for me was that the page seemed to work on mobile, using the mobile view.

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