내부에서 ddns접속하면 외부로 우회하지않고 내부 ip로 인식하는 net loopback 기능이 현재 asus 공유기에서는 적용안됩니다.

내부에서는 내부ip 로 접속해야 제속도 나옵니다

asus 공유기(멀린펌)의 nat loopback 기능이 384.4 버전이후 삭제되었습니다.

384.4 (16-Mar-2018)
   - NEW: Merged with GPL 384_20379 (with some binary components
          from 382_50010 and 384_20308 depending on models)
   - NEW: Added support for the RT-AC5300.
   - NEW: Added support for the RT-AC87U.
   - NEW: Added IPSEC support to the RT-AC86U.
   - NEW: Support the new Entware 64-bit repo on the RT-AC86U.
          To switch to the new repository, re-run the
          entware-setup.sh script.  You will need to reinstall
          your apps (your old config files are backed up on
          your USB disk).
   - CHANGED: Tightened security around some config files.
   - CHANGED: Allow guest networks settings for AP isolation
              and SSID broadcast to be set separately from
              their parent interface (John Bacho)
   - CHANGED: Samba protocol support can now be set to
              SMBv1, SMBv2, or SMBv1 + SMBv2 (the new default).
              This will result in a performance drop on all
              models but the RT-AC86U, but will be more secure.
              Ideally, people should change it to SMBv2 only,
              and then reboot all their client devices to start
              using only the new protocol.
   - CHANGED: Re-added some of the logging sd-idle used to do
              in 380.xx.
   - CHANGED: Switched to the new Entware repo for armv7 models.
              To upgrade, run the following commands TWICE:
              opkg update; opkg upgrade
   - FIXED: Resetting an OpenVPN client to default settings
            might revert back after a reboot.
   - FIXED: log flood from lldpd about "unable to send packet
            on real device" (moved to debug level)
   - FIXED: Potential racing condition that could lead to two
            instances of miniupnpd running at boot time.
   - FIXED: Single-char hostnames were rejected by DHCP static
            leasees page. (theMIROn)
   - FIXED: AiCloud could sometime generate a new SSL certificate
            that would overwrite the one stored in jffs.  Now,
            AiCloud can also use the same one uploaded by the
            user for the main webui, or the Let's Encrypt one.
   - REMOVED: Telnet server.  Please use SSH for console-based
              management.
   - REMOVED: SNMP support on the RT-AC86U (incompatible)
   - REMOVED: Merlin NAT loopback mode (was increasingly
              problematic as the firmware firewall handling became
              more complex)

   https://www.asuswrt-merlin.net/changelog-382