New VLAN generates Block WAN requests is ON error

[gareth-uk]

I hope someone can help. I have recently created a new VLAN and subnet (10.5.4.0/24) for wireless clients and generally it works fine for accessing other resources across our network. However when a client on this new subnet tries to connect to 3CX (10.3.4.51/24) 3CX blocks them and logs the error "SIP request (SUBSCRIBE) from 10.5.4.5 was rejected. Reason: Block WAN requests is ON". Any ideas where I should look? I'm not sure why 3CX considers 10.5.x.x to be a WAN address.

Edit- Now fixed. Turns out the 3CX LOCALSUBNETS parameter needed some changes.