SOLVED Sucuri and 502 Bad Gateway for Dns issue?

Hi guys,

I have a strange problem, on a working domain and hosting we changed the dns setting pointing it to the sucuri waf ip and from that moment we are getting 502 bad gateway from nginx.

I think the problem is related to the nginx dns query that return a different ip respect the cpanel one (the sucuri ip), could be?

Any experience on it or what fix it?

Thank you
Regards
Marco

 

Hi,

Yes, the error was coming out from my server that is running a classical setup nginx+apache.

After many hours looking on google i have found the reason of this, the resolver option under the nginx configuration was performing a dns query to each domain before to pass the request to apache trying to connect to the sucuriIP:8080 that's the reason of the 502 error.

The workaround has been to replace the google dns 8.8.8.8 used with the local bind server.

Probably there is a better way to do this, but it's working fine.

Thank you
M.