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RT-AC86U. Port scan shows port 21 open to WAN. FTP has always been off. How do I close it?

Discussion in 'Asuswrt-Merlin' started by markpaterson, Aug 18, 2019.

  1. markpaterson

    markpaterson New Around Here

    Joined:
    Aug 18, 2019
    Messages:
    4
    I'm running Merlin 384.13 on an ASUS RT-AC86U. I installed Merlin yesterday for the first time and did a factory reset after installing.

    I've just done a port scan of my home's external IP from a computer outside of my home network and it revealed that Port 21 is open. I have never used the FTP setting on the router, and I confirmed that it's off and the "allow FTP over WAN" is off too.

    How do I close this port? I see nothing in the entire firmware that even mentions port 21.

    Thanks
     
  2. ColinTaylor

    ColinTaylor Part of the Furniture

    Joined:
    Mar 31, 2014
    Messages:
    9,269
    Location:
    UK
    Is it actually open or is it detecting your ISP's equipment and thereby creating a false positive? Try connecting to it from outside your network and see what the banner message says.

    That said, there was this fix for FTP in 384.13:
    Code:
    384.13 (31-July-2019)
      - FIXED: FTP would be accessible from the WAN even while disabled
               if you had DualWAN load balancing enabled, or IPTV
               configured.
     
  3. eastavin

    eastavin Regular Contributor

    Joined:
    Jun 4, 2011
    Messages:
    149
    Location:
    Niagara Falls, Canada & USA
    Try another scan with Gibson shields up for comparision https://www.grc.com/x/ne.dll?bh0bkyd2