Can my haproxy.cfg be improved?

I’ve been using this config for a while and it’s been working fine, but I recently began wondering whether it could be improved - could someone take a look and let me know if it’s optimal or not please?

global
  #
  #
  # to have these messages end up in /var/log/haproxy.log you will
  # need to:
  #
  # 1) configure syslog to accept network log events.  This is done
  #    by adding the '-r' option to the SYSLOGD_OPTIONS in
  #    /etc/sysconfig/syslog
  #
  # 2) configure local2 events to go to the /var/log/haproxy.log
  #   file. A line like the following can be added to
  #   /etc/sysconfig/syslog
  #
  #    local2.*                       /var/log/haproxy.log
  #
  # log         127.0.0.1 local2


  tune.ssl.default-dh-param 2048

  ssl-default-bind-options no-sslv3 no-tls-tickets
  ssl-default-bind-ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA

  ssl-default-server-options no-sslv3 no-tls-tickets
  ssl-default-server-ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA



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

  # turn on stats unix socket
  stats socket /var/lib/haproxy/stats

  tune.ssl.default-dh-param 2048

defaults
  mode                    http
  log                     global
  option                  httplog
  option                  dontlognull
  option http-server-close
  # option forwardfor       except 127.0.0.0/8
  option forwardfor
  option                  redispatch
  retries                 3
  timeout http-request    5s
  option http-buffer-request
  timeout queue           1m
  timeout connect         10s
  timeout client          1m
  timeout server          1m
  timeout http-keep-alive 10s
  timeout check           10s
  maxconn                 30000

    
frontend http-in
  bind *:80
  bind :::80
  bind *:443 ssl crt /etc/haproxy/certs/ no-sslv3 no-tlsv10
  bind :::443 ssl crt /etc/haproxy/certs/ no-sslv3 no-tlsv10
  acl letsencrypt-acl path_beg /.well-known/acme-challenge/
  use_backend letsencrypt-backend if letsencrypt-acl
  default_backend main_apache_sites
  http-request add-header X-Forwarded-Proto https if { ssl_fc }

  # Define hosts
  redirect prefix http://site-one.com code 301 if { hdr(host) -i www.site-one.com }
  acl host_site-one hdr(host) -i site-one.com
  redirect prefix http://site-two.com code 301 if { hdr(host) -i www.site-two.com }
  acl host_site-two hdr(host) -i site-two.com

  #Redirect sites to HTTPS
  acl ssl_redirect_hosts hdr(Host) -i site-one.com
  acl ssl_redirect_hosts hdr(Host) -i site-two.com
  redirect scheme https if ssl_redirect_hosts !{ ssl_fc }
  redirect scheme https code 301 if !{ ssl_fc }


  # figure out which one to use
  use_backend site-one_docker if host_site-one
  use_backend site-two_docker if host_site-two


backend main_apache_sites
  server server1 127.0.0.1:8080 cookie A check
  cookie JSESSIONID prefix nocache

backend site-one_docker
  server server2 127.0.0.1:8889 cookie A check maxconn 5000
  cookie JSESSIONID prefix nocache

backend site-two_docker
  server server3 127.0.0.1:8894 cookie A check
  cookie JSESSIONID prefix nocache

backend letsencrypt-backend
  server letsencrypt 127.0.0.1:55555

Thanks in advance for any help.

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