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Issues with Pro theme on WPMU DEV hosting

I was adding a domain name to a WPMUDEV hosting. The DNS and SSL are green. I set the new domain as Primary. But two issues, the site is really slow, and when trying to access wp-admin I get a 502 gateway error.

When I deactivate Pro theme, everything works fine. I wonder why the theme would do that. I use it on all my websites and it was working fine before I added the domain.

Fri, 16 Nov 2018 17:45:56
  • Kasia Swiderska
    • Support nomad

    Hello Nathan,

    Our sysadmin checked access logs of your site and the reason this error is showing is that of DDoS on your site.

    We found this in logs:

    197.239.3.20 - - [16/Nov/2018:20:41:39 +0000] "POST / HTTP/1.1" 502 1690 "-" "Go-http-client/1.1"
    
5.134.186.149 - - [16/Nov/2018:20:41:39 +0000] "POST / HTTP/2.0" 200 5448 "-" "Go-http-client/2.0"
    
5.74.95.65 - - [16/Nov/2018:20:41:39 +0000] "POST / HTTP/2.0" 499 0 "-" "Go-http-client/2.0"
    
84.47.218.203 - - [16/Nov/2018:20:41:40 +0000] "POST / HTTP/2.0" 499 0 "-" "Go-http-client/2.0"
    
5.112.11.132 - - [16/Nov/2018:20:41:40 +0000] "POST / HTTP/1.1" 408 0 "-" "Go-http-client/1.1"
    
5.250.7.7 - - [16/Nov/2018:20:41:40 +0000] "POST / HTTP/2.0" 499 0 "-" "Go-http-client/2.0"

    So in this case firewall provider should block “Go-http-client UA”.

    Our sysadmin suggested using CloudFlare because it should block it.

    kind regards,

    Kasia

  • Kasia Swiderska
    • Support nomad

    Hello Nathan,

    Sysadmin added custom nginx rule blocking that user agent for now and if you check now, your site has Pro theme active and it’s not throwing this error.

    I’m not able to say why DDoS would hit on a new domain – we just see in logs that those are Iranian IPs hitting on your site.

    With so much traffic it will slow down the server – so if Pro theme requires more resources than 2017 then it will more likely put the site down.

    kind regards,

  • Nathan
    • Getting there

    Pro theme works perfectly fine before the domain change. Which is why it does not make sense. I’ve set up another hosting account that I’ve been working on with Pro theme with no issues. I will attempt to add a domain to this site as will and inform you here if there is another issue.