Port forwarding from a specific IP

[Guest]

[Questions]

So,  the firewall settings have frustrated me often... I am a long time admin so networking and working with firewalls is something I do often.  I have some networks that I have endian on for various reasons.

The current issue I have is trying to forward a port from a certain ip source.

The rule I have setup is

Incoming ip: Uplink Any
Incoming service/port: userspecified port xxxxx (TCP in this case)
Translate to type: ip

insert ip: 10... (internal server)
Port range: xxxxx
Nat: NAT

(And this is where I run into trouble)

If I set the  Access From source type to ANY it work fine from all sources (not what I want)

If I set source type to Network/IP/Range and enter the public ip of my other network it blocks all traffic.

I have tried to use system access and setting up a rule there to no avail.

So the question is how do I allow access from ONLY a certain ip or ip list?

Thanks in advance,
Richard