Can not access device on AP

General
1

I have the following setup:

  • using Peplink MAX BR1 Mini, Firmware 8.4.1 build 5107
  • network 192.168.36.1/24
  • a device (linux server) connected (via Ethernet) with IP 192.168.36.3
  • wifi AP enabled on the same VLAN
  • another device is connected to wifi with IP 192.168.36.172

problem:
when I try to ping the device from my server, I get error message

ping 192.168.36.172

PING 192.168.36.172 (192.168.36.172) 56(84) bytes of data.
From 192.168.36.3 icmp_seq=1 Destination Host Unreachable
From 192.168.36.3 icmp_seq=2 Destination Host Unreachable
…

however, when I try to ping from the Web Admin, it works:
PING 192.168.36.172 (192.168.36.172) from 192.168.36.1 56(84) bytes of data.
64 bytes from 192.168.36.172: icmp_req=1 ttl=64 time=2.31 ms
64 bytes from 192.168.36.172: icmp_req=2 ttl=64 time=2.23 ms
…

somehow, I am not able to access the device connected to Wifi AP. it seems like there is some form of wireless client isolation. however, I am not able to see any settings in this regard. the only settings i am able to find under AP are “Guest Protect” and “Firewall Settings”. I am using default settings (both are disabled), tried also different alternatives, but nothing seems to solve the problem.

any idea - why can I not access the device on Wifi AP from another device on fixed line connection on the same subnet?

2

Ah, silly me.
Just after sending this, I changed “Access Control Settings” under SSID configuration from “None” to “Accept all except listed”, and this seems to have solved the problem.

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