title: HAProxy restrict single backend by ip range
body: <p>I have inherited an HAProxy setup with around twenty backend definitions (and little else) in the config file. I have been asked to restrict one of the backends to a specific IP range, but so far my research (and limited HAProxy knowledge) have yielded nothing.</p>
  
  <p>Whilst reading the <a href="http://haproxy.1wt.eu/download/1.4/doc/configuration.txt" rel="noreferrer">manual</a>, I have found a network_allowed parameter that would <a href="https://raymii.org/s/snippets/haproxy_restrict_specific_urls_to_specific_ip_addresses.html" rel="noreferrer">work for a frontend</a>, but I don't seem to have any front end definitions and I don't want to apply this restriction to any of the other proxy routes. Is there anything I can specifically use on a backend to restrict access by IP range?</p>
  
  <p>Thanks,
  Simon</p>