Proxy SQL Services Reporting Server with HAProxy

A common issue with SQL Server Reporting Services is to proxy the server so it is not exposed on the internet. This is difficult to do with nginx, apache, and others due to NTLM authentication, although nginx offers a paid version that supports NTLM authentication. One easy fix is to use HAProxy and use TCP mode.

A simple configuration like the following works well. Note that this configuration requires an SSL certificate (+key) and terminates SSL at the haproxy service.

global
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon

    stats socket /var/lib/haproxy/stats

    # utilize system-wide crypto-policies
    ssl-default-bind-ciphers PROFILE=SYSTEM
    ssl-default-server-ciphers PROFILE=SYSTEM

defaults
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000

frontend main
    bind *:80
    bind *:443 ssl crt /etc/haproxy/$path_to_cert_and_key_in_one_file
    option tcplog
    mode tcp
    default_backend             ssrs

backend ssrs
    mode tcp
    server  $ssrs_hostname $ssrs_ip_address:80 check

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