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Reverse Proxy Setup Guide

It is recommended to run nostr-rs-relay behind a reverse proxy such as haproxy or nginx to provide TLS termination. A simple example of an haproxy configuration is documented here.

Minimal HAProxy Configuration

Assumptions:

  • HAProxy version is 2.4.10 or greater (older versions not tested).
  • Hostname for the relay is relay.example.com.
  • Your relay should be available over wss://relay.example.com
  • Your (NIP-11) relay info page should be available on https://relay.example.com
  • SSL certificate is located in /etc/certs/example.com.pem.
  • Relay is running on port 8080.
  • Limit connections to 400 concurrent.
  • HSTS (HTTP Strict Transport Security) is desired.
  • Only TLS 1.2 or greater is allowed.
global
    ssl-default-bind-ciphersuites TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
    ssl-default-bind-options prefer-client-ciphers no-sslv3 no-tlsv10 no-tlsv11 no-tls-tickets

frontend fe_prod
    mode    http
    bind    :443 ssl crt /etc/certs/example.com.pem alpn h2,http/1.1
    bind    :80
    http-request set-header X-Forwarded-Proto https if { ssl_fc }
    redirect scheme https code 301 if !{ ssl_fc }
    acl host_relay hdr(host) -i relay.example.com
    use_backend relay if host_relay
    # HSTS (1 year)
    http-response set-header Strict-Transport-Security max-age=31536000

backend relay
    mode http
    timeout connect 5s
    timeout client 50s
    timeout server 50s
    timeout tunnel 1h
    timeout client-fin 30s
    option tcp-check
    default-server maxconn 400 check inter 20s fastinter 1s
    server relay 127.0.0.1:8080

Notes

You may experience WebSocket connection problems with Firefox if HTTP/2 is enabled, for older versions of HAProxy (2.3.x). Either disable HTTP/2 (h2), or upgrade HAProxy.