This article explains how to troubleshoot registration issues for the Sophos Access Point.
Known to apply to the following Sophos product(s) and version(s) Sophos UTM Sophos AP
Operating systems Sophos UTM 9.100 or higher
Wireless access points attempt to register with UTM using the address 220.127.116.11 on TCP port 2712.
In case you are using a router (which is in this case the default gateway for the AP) in between the AP and the UTM it could also cause registration issues as the router doesn´t forward packets from the AP to the UTM with the magic IP.
To fix this issue configure a route on the Router for the IP 18.104.22.168 to the UTM
In case you can not configure a route on the Router you can alternatively configure your DHCP server to forward all registration requests to the IP of the interface on the UTM instead of the magic IP.
This can be done by configuring the DHCP server option code 234(magic IP) for the IP of the interface where the AP is connected to.
Example: Configuration of DHCP option 234 on Windows Server 2008
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