MagicMirror behind a NGinx Reverse Proxy

fbr1969 · Dec 23, 2019, 1:31 PM

Hi,
I’m would like to acced to MM (192.168.10.60:8080) behind a Nginx Reverse Proxy (IP:192.168.10.10 for example). I’m not an expert of Nginx and I tried :

server {
    listen      80;
    server_name domain.com;
    return      301 https://$server_name$request_uri;
}

server {

    # Setup HTTPS certificates
    listen       443 default ssl;
    server_name  domain.com;
    ssl_certificate /etc/letsencrypt/live/domain.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/domain.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

    location /mmirror {
        proxy_bind              $server_addr;
        proxy_pass              http://192.168.10.60:8080;
        proxy_set_header        Host            $http_host;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header        X-Scheme        $scheme;
        proxy_set_header        X-Script-Name   /;  
    }
    location / {
        root   /var/www/html;
        index  index.html ;
    }
}

But if y want to access to : 192.168.10.10/mmirror
I get this error : 502 Bad Gateway nginx/1.14.2
MagicMirror is of course fully fonctionnal in direct by 192.168.10.60:8080.

Thank for your help.
François

sdetweil · Dec 23, 2019, 1:52 PM

@fbr1969 is domain.com resolved by the client system to the nginx server?

this
192.168.10.10/mmirror
should get a 301 moved to https://domain.com/mmirror
where-ever domain.com is…

I might change the moved to https://$server_addr$request_url

sdetweil · Dec 23, 2019, 2:03 PM

@fbr1969 said in MagicMirror behind a NGinx Reverse Proxy:

192.168.10.10/mmirror

if u do

curl http://192.168.10.10/mmirror

(do not use -L)

u should get a 301 response, right?

and if u use the url in the moved, does it work? domain.com shouldn’t. proxy.domain.com might if u have a hosts entry or a dns server resolving that to 192.168.10.10

you could also do

curl -iL http://192.168.10.10/mmirror

to see the full flow (-i shows the response headers)
https://stackabuse.com/follow-redirects-in-curl/

sdetweil · Dec 23, 2019, 2:05 PM

I would also try

https://192.168.10.10/mmirror

and see if that works (no redirect)
this will test the certs and the passthru config

ember1205 · Dec 23, 2019, 4:21 PM

Firstly, do you really want to put your mirror behind a piece of software developed by the Russians, released into Open Source, then claimed by another Russian Company as “theirs” after it was purchased out by a commercial entity (F5)? If you need a reverse proxy, you’re likely to have all that you need from a simply Apache setup.

Second - you will need to ensure that all of your rewrite rules take into account the back-end port along with the front-end port information as well as specific host name rules.

For example:

If your MM is 192.168.1.10 and you have a system running reverse proxy with a VIP on 192.168.1.50, you will need to decide if you’re going to continue using port 8080 on the front-end or if you want to fall back to standard port 80 (or even tie it up with a certificate on 443 with HTTPS/SSL).

In other words, you could be doing client to proxy as 192.168.1.100 -> http://192.168.1.50 or 192.168.1.100 -> http://192.168.1.50:8080 or 192.168.1.100 -> https://192.168.1.50 or something else entirely.

After you have decided how you’re handling the front end, you then need to ensure that you’re rewriting ALL of that as it passes through the proxy to/from http://192.168.1.10:8080

You ALSO need to ensure that you have updated the configuration on MM to allow connections from off-box IP’s. Specifically, unless you are forcing the use of the original source IP, connections to the mirror should be coming from the system running your proxy and THAT address needs to have access to the web server on the mirror.

fbr1969 · Dec 23, 2019, 6:16 PM

@sdetweil @ember1205 Thank for your help.
I made a mistake ! My error is 404 (Cannot GET /mmirror)

I forgot to say :

My nginx server is fully fonctional with some other locations I’ve masqued in my exemple of configuration files… Like that :

    # Proxy to the Airsonic server
    location /airsonic {
        proxy_set_header X-Real-IP         $remote_addr;
        proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto https;
        proxy_set_header X-Forwarded-Host  $http_host;
        proxy_set_header Host              $http_host;
        proxy_max_temp_file_size           0;
        proxy_pass                         http://192.168.10.30:8080/airsonic;
        proxy_redirect                     http:// https://;
    }

    location /calilivre {
        proxy_bind              $server_addr;
        proxy_pass              http://192.168.10.20:8080;
        proxy_set_header        Host            $http_host;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header        X-Forwarded-Host $server_name;
        proxy_set_header        X-Scheme        $scheme;
        proxy_set_header        X-Script-Name   /calilivre;  # IMPORTANT: path has NO trailing slash
    }

    location /calibd {
        proxy_bind              $server_addr;
        proxy_pass              http://192.168.10.50:8080;
        proxy_set_header        Host            $http_host;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header        X-Scheme        $scheme;
        proxy_set_header        X-Script-Name   /calibd;  # IMPORTANT: path has NO trailing slash
    }

    location /mmirror {
        proxy_bind              $server_addr;
        proxy_pass              http://192.168.10.60:8080;
        proxy_set_header        Host            $http_host;
        proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header        X-Scheme        $scheme;
        proxy_set_header        X-Script-Name   /;  # IMPORTANT: path has NO trailing slash
    }

So, airsonic, calibd or calilivre are fully fonctional in http (redirect to https) or https.
My 'domainename (ex:domain.com) is resolved by dns.
I can do my test on my private lan or on Internet. I’ve the same result (502 Bad Gateway).
Look the curl result :

curl -iL http://192.168.10.10/mmirror
HTTP/1.1 301 Moved Permanently
Server: nginx/1.14.2
Date: Mon, 23 Dec 2019 18:14:36 GMT
Content-Type: text/html
Content-Length: 185
Connection: keep-alive
Location: https://[MyDomain]/mmirror

HTTP/1.1 404 Not Found
Server: nginx/1.14.2
Date: Mon, 23 Dec 2019 18:14:36 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 146
Connection: keep-alive
X-DNS-Prefetch-Control: off
X-Frame-Options: SAMEORIGIN
Strict-Transport-Security: max-age=15552000; includeSubDomains
X-Download-Options: noopen
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Content-Security-Policy: default-src 'self'

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Error</title>
</head>
<body>
<pre>Cannot GET /mmirror</pre>
</body>
</html>

I think I have some problems with some "proxy_set_header " rules.

Best regards

fbr1969 · Dec 23, 2019, 6:07 PM

@fbr1969
And yes, Magicmirror is fonctional in direct connection with : http://192.168.10.60:8080

ember1205 · Dec 23, 2019, 6:16 PM

@fbr1969 said in MagicMirror behind a NGinx Reverse Proxy:

@sdetweil @ember1205 Thank for your help.

I forgot to say :

My nginx server is fully fonctional with some other locations I’ve masqued in my exemple of configuration files… Like that :

location /mmirror {
    proxy_bind              $server_addr;
    proxy_pass              http://192.168.10.60:8080;
    proxy_set_header        Host            $http_host;
    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header        X-Scheme        $scheme;
    proxy_set_header        X-Script-Name   /;  # IMPORTANT: path has NO trailing slash
}

I think I have some problems with some "proxy_set_header " rules.

It appears that your X-Script-Name IS setting a trailing slash and isn’t inserting / removing mmirror. Shouldn’t that last line be

     proxy_set_header        X-Script-Name   /mmirror;  # IMPORTANT: path has NO trailing slash

??

sdetweil · Dec 23, 2019, 7:46 PM

@ember1205 its pretty clear tho

curl -iL http://192.168.10.10/mmirror
HTTP/1.1 301 Moved Permanently
Server: nginx/1.14.2
Date: Mon, 23 Dec 2019 18:14:36 GMT
Content-Type: text/html
Content-Length: 185
Connection: keep-alive
Location: https://[MyDomain]/mmirror

HTTP/1.1 404 Not Found
Server: nginx/1.14.2
Date: Mon, 23 Dec 2019 18:14:36 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 146
Connection: keep-alive
X-DNS-Prefetch-Control: off
X-Frame-Options: SAMEORIGIN
Strict-Transport-Security: max-age=15552000; includeSubDomains
X-Download-Options: noopen
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Content-Security-Policy: default-src 'self'

Error
<pre>Cannot GET /mmirror</pre>

Cannot GET /mmirror

because that is on the client issuing the curl command, url with no ip address is same as localhost

what is this??
Location: https://[MyDomain]/mmirror

again this should be server.mydomain

if u go to client and do an nslookup domain.com
u will get an error
ping domain.com will fail

ember1205 · Dec 23, 2019, 8:42 PM

@sdetweil said in MagicMirror behind a NGinx Reverse Proxy:

@ember1205 its pretty clear tho

curl -iL http://192.168.10.10/mmirror
HTTP/1.1 301 Moved Permanently
Server: nginx/1.14.2
Date: Mon, 23 Dec 2019 18:14:36 GMT
Content-Type: text/html
Content-Length: 185
Connection: keep-alive
Location: https://[MyDomain]/mmirror

HTTP/1.1 404 Not Found
Server: nginx/1.14.2
Date: Mon, 23 Dec 2019 18:14:36 GMT
Content-Type: text/html; charset=utf-8
Content-Length: 146
Connection: keep-alive
X-DNS-Prefetch-Control: off
X-Frame-Options: SAMEORIGIN
Strict-Transport-Security: max-age=15552000; includeSubDomains
X-Download-Options: noopen
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Content-Security-Policy: default-src 'self'

Error
<pre>Cannot GET /mmirror</pre>

Cannot GET /mmirror

because that is on the client issuing the curl command, url with no ip address is same as localhost

what is this??
Location: https://[MyDomain]/mmirror

again this should be server.mydomain

if u go to client and do an nslookup domain.com
u will get an error
ping domain.com will fail

He stated that he is masking details of what he’s posting, so it’s definitely something to check.

However…

The error is delivered from nginx

Server: nginx/1.14.2

Which means that it isn’t attempting to retrieve the URL from localhost.

The missing directive that I mentioned prior is where I believe the issue is… The client IS connecting and requesting /mmirror, but that is not defined on the nginx host. As a result, it’s being processed by the default host configured there which will be on a different back-end server and that server does not have a /mmirror path available to serve. So, 404.