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With TRUSTED_PROXIES unset, bin/entrypoint.sh gives nginx one set_real_ip_from line for each of 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16, as sneak ruled on 2026-09-22 for every app. A list replaces them, and set and empty trusts no proxy; each entry is checked as before. The backend inside the container still trusts only 127.0.0.1/32. README.md, configs/nginx.conf and the comment in script/frontend-viewport-test say the new default. Model: opus-5-5
79 lines
2.8 KiB
Nginx Configuration File
79 lines
2.8 KiB
Nginx Configuration File
# A template: the nginx image renders it into conf.d at container start,
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# filling in PORT and nothing else. bin/entrypoint.sh sets PORT and that
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# limit.
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server {
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listen ${PORT};
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server_name _;
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# Keep the nginx version out of the Server header and error pages.
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server_tokens off;
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# The security headers, on every response. An add_header in a
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# location drops every add_header from here, so a location with one
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# of its own includes this file again.
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include /etc/nginx/security-headers.conf;
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root /usr/share/nginx/html;
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index index.html;
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# The client address comes from X-Forwarded-For only on a request
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# from the reverse proxies in TRUSTED_PROXIES: bin/entrypoint.sh
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# writes one set_real_ip_from line for each into this file. Unset,
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# TRUSTED_PROXIES is the three private ranges of RFC 1918; set and
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# empty, the file is empty and the client address is the one each
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# request comes from.
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include /etc/nginx/trusted-proxies.conf;
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real_ip_header X-Forwarded-For;
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real_ip_recursive on;
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# Access log to stdout (Docker best practice)
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access_log /dev/stdout combined;
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error_log /dev/stderr warn;
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location / {
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try_files $uri $uri/ /index.html;
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}
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# Cache static assets aggressively
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location /assets/ {
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expires 1y;
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add_header Cache-Control "public, immutable";
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include /etc/nginx/security-headers.conf;
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}
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# netwatch-server, the Go backend, runs in the same container and
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# listens on loopback only: bin/entrypoint.sh starts it on
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# 127.0.0.1:8081. These headers go with every request passed to it.
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# X-Forwarded-For carries only the client address, as resolved by
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# the real IP settings above, and not the chain the request came
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# with: the backend takes the first entry, which a client can write.
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proxy_set_header Host $host;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-For $remote_addr;
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proxy_set_header X-Forwarded-Proto $scheme;
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# netwatch-server sets the same security headers on its own
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# responses. Its copies are dropped so that each header goes out
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# once, as configs/security-headers.conf sets it.
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proxy_hide_header Strict-Transport-Security;
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proxy_hide_header Content-Security-Policy;
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proxy_hide_header X-Frame-Options;
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proxy_hide_header X-Content-Type-Options;
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proxy_hide_header Referrer-Policy;
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proxy_hide_header Permissions-Policy;
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location /api/ {
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proxy_pass http://127.0.0.1:8081;
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}
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location = /.well-known/healthcheck {
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proxy_pass http://127.0.0.1:8081;
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}
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# The backend's Prometheus metrics, behind its own basic auth. Unless
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# METRICS_USERNAME and METRICS_PASSWORD are set, it answers 404.
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location = /metrics {
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proxy_pass http://127.0.0.1:8081;
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}
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}
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