What is the $server_name variable set to?

Question

I have a server block to redirect all http requests to https as follows:

server {
   listen 0.0.0.0:80;
   listen [::]:80;
   server_name a.com b.com c.com;
   return 301 https://$server_name$request_uri;
}

It seems that requests coming in using all three domain names on port 80 will be redirected to https://a.com. Is this how $server_name is set?

You probably want to use `$host` instead of `$server_name`. See [What is the difference between Nginx variables $host, $http_host, and $server_name?](https://serverfault.com/q/706438/126632) — Michael Hampton, Aug 01 '18 at 15:05

ceejayoz · Accepted Answer · 2018-08-01T15:54:32.070

2

The first name becomes the primary server name.

You can use three separate server blocks, or Michael Hampton's excellent suggestion of the $host variable instead.

edited Aug 01 '18 at 15:54

answered Aug 01 '18 at 15:01

ceejayoz

Thanks. I was looking at http://nginx.org/en/docs/http/ngx_http_core_module.html#var_server_name which was vague. – Old Geezer Aug 01 '18 at 15:07
`server_name_in_redirect` won't help here, and it's off by default anyway. – Michael Hampton Aug 01 '18 at 15:29
@MichaelHampton Yeah, your `$host` thing is much better. – ceejayoz Aug 01 '18 at 15:54

1 Answers1