Reverse proxy

If Shaarli is hosted on a server behind a reverse proxy (i.e. there is a proxy server between clients and the web server hosting Shaarli), configure it accordingly. See Reverse proxy configuration. In this example:

The Shaarli application server exposes port 10080 to the proxy (for example docker container started with --publish 127.0.0.1:10080:80).
The Shaarli application server runs at 127.0.0.1 (container). Replace with the server's IP address if running on a different machine.
Shaarli's Fully Qualified Domain Name (FQDN) is shaarli.mydomain.org.
No HTTPS is setup on the application server, SSL termination is done at the reverse proxy.

In your Shaarli configuration data/config.json.php, add the public IP of your proxy under security.trusted_proxies.

Apache

<VirtualHost *:80>
    ServerName shaarli.mydomain.org

    # For SSL/TLS certificates acquired with certbot or self-signed certificates
    # Redirect HTTP requests to HTTPS, except Let's Encrypt ACME challenge requests
    RewriteEngine on
    RewriteRule ^.well-known/acme-challenge/ - [L]
    RewriteCond %{HTTP_HOST} =shaarli.mydomain.org
    RewriteRule  ^ https://shaarli.mydomain.org%{REQUEST_URI} [END,NE,R=permanent]
</VirtualHost>

# SSL/TLS configuration for Let's Encrypt certificates managed with mod_md
#MDomain shaarli.mydomain.org
#MDCertificateAgreement accepted
#MDContactEmail admin@shaarli.mydomain.org
#MDPrivateKeys RSA 4096

<VirtualHost *:443>
    ServerName shaarli.mydomain.org

    # SSL/TLS configuration for Let's Encrypt certificates acquired with certbot standalone
    SSLEngine             on
    SSLCertificateFile    /etc/letsencrypt/live/shaarli.mydomain.org/fullchain.pem
    SSLCertificateKeyFile /etc/letsencrypt/live/shaarli.mydomain.org/privkey.pem
    # Let's Encrypt settings from https://github.com/certbot/certbot/blob/master/certbot-apache/certbot_apache/_internal/tls_configs/current-options-ssl-apache.conf
    SSLProtocol             all -SSLv2 -SSLv3 -TLSv1 -TLSv1.1
    SSLCipherSuite          ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
    SSLHonorCipherOrder     off
    SSLSessionTickets       off
    SSLOptions +StrictRequire

    # SSL/TLS configuration for self-signed certificates
    #SSLEngine             on
    #SSLCertificateFile    /etc/ssl/certs/ssl-cert-snakeoil.pem
    #SSLCertificateKeyFile /etc/ssl/private/ssl-cert-snakeoil.key

    # let the proxied shaarli server/container know HTTPS URLs should be served
    RequestHeader set X-Forwarded-Proto "https"

    # send the original SERVER_NAME to the proxied host
    ProxyPreserveHost On
    
    # pass requests to the proxied host
    # sets X-Forwarded-For, X-Forwarded-Host and X-Forwarded-Server headers
    ProxyPass        / http://127.0.0.1:10080/
    ProxyPassReverse / http://127.0.0.1:10080/
</VirtualHost>

HAProxy

global
    [...]

defaults
    [...]

frontend http-in
    bind :80
    redirect scheme https code 301 if !{ ssl_fc }
    bind :443 ssl crt /path/to/cert.pem
    default_backend shaarli

backend shaarli
    mode http
    option http-server-close
    option forwardfor
    reqadd X-Forwarded-Proto: https
    server shaarli1 127.0.0.1:10080

HAProxy documentation

Nginx

http {
    [...]

    index index.html index.php;

    root        /home/john/web;
    access_log  /var/log/nginx/access.log combined;
    error_log   /var/log/nginx/error.log;

    server {
        listen       80;
        server_name  shaarli.mydomain.org;
        # redirect HTTP to HTTPS
        return       301 https://shaarli.mydomain.org$request_uri;
    }

    server {
        listen       443 ssl http2;
        server_name  shaarli.mydomain.org;

        ssl_certificate       /path/to/certificate
        ssl_certificate_key   /path/to/private/key

        location / {
            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 $scheme;
            proxy_set_header  X-Forwarded-Host  $host;

            # pass requests to the proxied host
            proxy_pass             http://localhost:10080/;
            proxy_set_header Host  $host;
            proxy_connect_timeout  30s;
            proxy_read_timeout     120s;
        }
    }
}

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Reverse proxy

Apache

HAProxy

Nginx

References

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