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    HAProxy not recognising dynamic public ip address change until service restart

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    • C
      Clarence
      last edited by

      Hello friendly forum peeps,

      in the past month I have setup a frontend and backend in HAProxy to access my local services via subdomains of a domain I own.
      Reason being I like not having to deal with certificate error messages when opening the web GUIs of my services in a web browser.

      For security reasons I use ACLs on the backend to perform a "http-request deny" if a local network or my domain name (DNS rebinding is annoying) is NOT recognised.
      The local networks are grouped with the help of an alias but because I have not been successful in getting PfSense aliases to resolve hostnames I can't add my domain name to the alias.
      So I just added my domain name as an additional "Source IP matches IP or Alias:" backed ACL rule and this works great until my ISP decides to restart my router remotely during working hours (the absolute F*cking cheek) and I receive a new IP address. Thereafter I naturally get "403: Request forbidden by administrator rule...." because my domain name does not resolve to the same public IP according to HAProxy.

      Do I need to change the HAProxy global dns resolver settings in order to get things automated after a change of public IP address?
      b71a5d8b-b980-442b-a39c-f83caedccbea-image.png
      Or are cron jobs my only source of respite?

      Thanks in advance for any help! 😊

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      • C
        Clarence
        last edited by

        EDIT: Note that I have double NAT (using my ISP cable modem is a necessity. PfSense is "behind" it.) but have setup my WAN gateway to monitor 8.8.4.4.

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        • C
          Clarence
          last edited by

          Anyone have any ideas?

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