Nginx Redirect HTTPS to HTTP

Just remove the redirect and notify all visitors to clear their browser caches and restart their browsers as the 301 permanent redirect is cached permanently in the visitors browsers, so will result in an error if visitors visit the page. If you attempt a nginx rewrite redirect from https back to http, you will end up in a redirect loop and visitor browser cache will redirect http back to https.

Code:

#server {
#server_name domain.com www.domain.com;
#return 301 https://$server_name$request_uri;
#}

usually once you go https you should keep using https and not go back to http non-SSL.

 

what is the iframe code for ? If iframe supports https just use that or use //domain.com instead of http://domain.com

 

subdomain site should have a separate nginx vhost which would prevent such redirects if the subdomain is non-https setup and configured

 

can't be the reason, if the maindomain.com and subdomain.maindomain.com have separate nginx vhosts on same or different server, it shouldn't matter and shouldn't redirect subdomain to https if you have configured nginx vhost correctly..

post the contents for both nginx vhost here

 

for subdomain no need to redirect 301 at all if you only serve http

remove that line

Code:

return 301 $scheme://Sub.MyDomain.com$request_uri;