How to forbit a certain IP, please?

[Centauri39]

I've got a WLAN router and 2 computers (both of them on XP Home SP3) in my local network and UVNC (server and client) is installed on both of them.

Both of these computers are connected via the above mentioned router using its WLAN feature.
One of these computers (let's call it "C1") is connected to the router via LAN cable at the same time.
I need the LAN connection and its according LAN IP only for Wake-on-LAN purposes,
everything else is supposed to use the WLAN IP.

Now, if I try to establish a UVNC session by connecting the UVNCviewer of C2 (which is of course my 2nd computer) to the UVNCserver of C1,
the UVNCviewer of C2 is using the LAN IP of C1, but I want C2 to use the WLAN IP.

How can I force UVNC to ignore the unwanted LAN IP and to use the wanted WLAN IP, please?

[uvncproblem]

Why can't you connect directly to the specified IP address? What do you type in when you start a session?

[Rudi De Vos]

Search for the AuthHosts=
parameter in ultravnc.ini
-10.0.20.240 :