Support » Plugin: Shift8 CDN » 502 Bad Gateway

  • Resolved stvrayvon

    (@stvrayvon)


    The Shift8 plugin was working but is not now working.

    https://11id2brgtnnjt.wpcdn.shift8cdn.com/wp-content/plugins/shift8-cdn/test/test.png

    Here are some details to help:

    Shift8 CDN Debug Info
    WordPress Version: 5.4.2
    Current WordPress Theme: Divi version 4.5.1
    Theme Author: Elegant Themes – http://www.elegantthemes.com
    Theme URI: http://www.elegantthemes.com/gallery/divi/
    PHP Version: 7.3.17
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    • This topic was modified 1 year, 10 months ago by stvrayvon.

    The page I need help with: [log in to see the link]

Viewing 4 replies - 1 through 4 (of 4 total)
  • Plugin Author shift8

    (@shift8)

    Hey there!

    So I took a look into this for you and determined that something on your web servers side is blocking our CDN from pulling static assets.

    If I login to one of our CDN servers and just try to grab the test URL from your server directly, it times out. This may appear intermittent to you because its possible (depending on your geographic location) that you are hitting different CDN endpoints so some may work and some may not :

    ]# wget https://family.interplan.com/wp-content/plugins/shift8-cdn/test/test.png
    --2020-07-14 16:05:01--  https://family.interplan.com/wp-content/plugins/shift8-cdn/test/test.png
    Resolving family.interplan.com (family.interplan.com)... 107.180.26.178
    Connecting to family.interplan.com (family.interplan.com)|107.180.26.178|:443... failed: Connection timed out.
    Retrying.
    
    --2020-07-14 16:05:09--  (try: 2)  https://family.interplan.com/wp-content/plugins/shift8-cdn/test/test.png
    Connecting to family.interplan.com (family.interplan.com)|107.180.26.178|:443... failed: Connection timed out.
    Retrying.
    
    --2020-07-14 16:05:18--  (try: 3)  https://family.interplan.com/wp-content/plugins/shift8-cdn/test/test.png
    Connecting to family.interplan.com (family.interplan.com)|107.180.26.178|:443... failed: Connection timed out.
    Retrying.
    
    --2020-07-14 16:05:28--  (try: 4)  https://family.interplan.com/wp-content/plugins/shift8-cdn/test/test.png
    Connecting to family.interplan.com (family.interplan.com)|107.180.26.178|:443... failed: Connection timed out.
    Retrying.

    My guess is that perhaps your web host has a throttling mechanism in place to block too many requests from the same IP address. This could be a really sensitive denial of service prevention mechanism.

    Our CDN will request static assets and try to cache them so we dont request too much but for a busy site, especially if you are sending no-cache headers (you can check that), your web host may be thinking that our CDN is trying to DoS attach your site. They may not be able to tell the difference because from their perspective we are just requesting a lot of URLs for your site.

    I notice that you have a plugin called “Shield security” installed, lets start by disabling that first and see if that fixes your problem. If it doesnt fix your problem then I would recommend reaching out to your web host to see if they can elaborate if they have a maximum number of connections per second (or similar) threshold protection.

    Hopefully its just that “Shield security” plugin, sometimes wordpress security plugins aren’t that smart and cause more problems than they solve.

    Hope this helps!

    Plugin Author shift8

    (@shift8)

    Going to mark this as resolved for now but feel free to reply if you have any other questions.

    Thanks!

    Thread Starter stvrayvon

    (@stvrayvon)

    Well, I didn’t get a chance to look into your suggestion(s) before you “resolved’ this ticket, but I will look into the suggestions and try your recommendations ASAP! (you were not quick an patience for my response.)

    When I have completed my efforts based on your recommendations I will update you all wit the results.

    Plugin Author shift8

    (@shift8)

    Yup – I admin I was too hasty in setting this issue as resolved. I try very hard to keep on top of all support issues for this plugin and unfortunately cannot undo when setting an issue as resolved.

    That said, if you do find to still have problems, I will personally open a new issue myself if need be.

    Thanks

Viewing 4 replies - 1 through 4 (of 4 total)
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