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DDNS Setup Problems

Discussion in 'Asuswrt-Merlin' started by archiel, Nov 9, 2018.

  1. archiel

    archiel Occasional Visitor

    Apr 17, 2016
    I am running Asuswrt-Merlin 384.7.2 on a AC87-U
    My ISP does not provide static IP addresses
    I need to setup DDNS to setup VPN and Media Server (Slim Server) access

    I am using FREEDNS in the DDNS setup. On their site I configured an A name record under the Subdomain menu (for my new domain xxxxx.mooo.com) and then Enable Dynamic DNS which gave me a username & password pair.
    On the router I went to the DDNS page added my hostname, username and password
    The other settings were:
    Method to Retrieve WAN IP: INTERNAL
    Enable wildcard: NO
    WAN IP and hostname verification: NO
    HTTPS/SSL Certificate: Let's Encrypt (then none)

    On first use the connection was successful, but no Certificate was obtained.

    However after my IP address changed the connection failed and the general log shows
    Nov 9 10:39:00 watchdog: start ddns.
    Nov 9 10:39:00 rc_service: watchdog 260:notify_rc start_ddns
    Nov 9 10:39:00 start_ddns: update FREEDNS.AFRAID.ORG [email protected], wan_unit 0
    Nov 9 10:39:01 inadyn[2359]: In-a-dyn version 2.5 -- Dynamic DNS update client.
    Nov 9 10:39:01 inadyn[2359]: Update forced for alias xxxxx.mooo.com, new IP# xxx.xxx.xxx.xxx
    Nov 9 10:39:03 inadyn[2359]: HTTP(S) Transaction failed, error 36: Temporary network error (HTTPS send)

    I also tried to setup Let's Encrypt using the instructions in https://www.asus.com/support/FAQ/1034294 but this did not work - nothing was retrieved and Let's Encrypt was stuck on Status: Updating.
    I also did not understand the instruction "Please make sure your router can issue domain validation and certificate renewal via 80 port from the Internet." I am not running any web servers on my network, so how / where do I open this port on the router (and what do I point it to?)
    To see if Let's Encrypt was the problem I set HTTPS/SSL Certificate to None, but this did not help.
    Given the reasons for DDNS use (VPN and routing to Media Server) do I even need Lets Encrypt or other certificate?
  2. Zastoff

    Zastoff Senior Member

    Nov 21, 2017
    Last edited: Nov 11, 2018
    SMS786 and kvic like this.