GL-inet DHCP of private LAN detected by WAN

[bpwl1]

Seen similar things with the SFT1200. Didn't see any DHCP probems but the WAN interface of GL.inet did leak local LAN IP addresses when connecting. This was version 4.3.21, the version 4.7.2beta is quite different.

SFT1200 2.4 GHz Repeater Disconnects

Damned GL.inet SFT1200 device. It claims a lot of external IP addresses as pointing to its own uplink MAC address, even when used in WLAN connected repeater mode, set as router (aka as WISP mode). This feature does exist for the LAN ethernet interface, as "DROP-in gateway", but it's not activated here, and it is not for the WLAN uplink interface. My Hotspot (Mikrotik) dynamic mode is triggered to NAT some of the leaked SFT1200-LAN addresses (192.168.8.x) to it's Hotspot normal range (where the S…

Some things were seen in the uplink ARP table. At least it confused my Mikrotik Hotspot software , which was using the Hotspot dynamic NAT to convert the local LAN IP, for a while.
(Mikrotik hotspot just accepts any IP address from a client)

SFT1200 2.4 GHz Repeater Disconnects

Status so far DFS use with 5 GHz can clearly be seen in the log now. (v4.3.21) disconnects with OpenWRT are all over the OpenWRT forum, with many tests and replies Most replies after tests state: it is a broadcast/multicast problem (not received packet), and if it is for the ARP packet then there are repeated disconnects " ARP/broadcast issues for wireless clients" in forum and github. Only solved since version 23.03 Use a SSH session on the SFT1200 and issue "ip neigh" command. And you will …

The DROP-in-gateway feature fiddles with the ARP table (proxy ARP?) , supposed to work on the ethernet connection only, but was seen in a wireless only setup.

Otherwise the local LAN ip leakage can be due to the firewall-reloads which happend quite frequently when the WWAN roamed to another AP with the same SSID. This seems to have stopped in 7.4.2beta.