Can't use RDP/rdesktop to connect to my Windows Laptop because it has to remain on a separate/isolated network, but its physically close to my Linux Desktop. I would prefer to not have a hardware KVM (Keyboard/Video/Mouse) switch with Hot-Keys or hardware buttons, is there anyway to hook into my laptop's video/mouse/keyboard ports to something that my Fedora Linux desktop could access just like any other RDP/rdesktop window, so I can see my Windows laptop alongside my Linux desktop?

I think you're asking if you can have an X emulator on your Windows laptop/workstation?

If so the answer is yes. There are commercial products such as OpenText (formerly Hummingbird) Exceed and Open Source things such as Cygwin/X you can install on Windows. I often run Linux X-Windows on my Windows laptop.

Edit:
On reread I see you say you can't access via network as it is on an isolated network.
In that case to do what you want would require a KVM.

Looks like you need something like this:
https://www.arduino.cc/en/Tutorial/K...ndMouseControl
You can connect 2 arduinos: one is the sender and the other receiver so this would use USB to USB in a round about way

I'm guessing you can use a webcam for the video.

Not an easy thing, but it'll make it possible I'm sure

Why don't you just use USB ethernet dongles on the 2 machines, connect them on a point-to-point ethernet then you back to using rdesktop

If it is on an isolated network it might be because they don't want a network path to it for security reasons and doing that would make it vulnerable to an attack from his workstation which presumably is on a wider network itself.

He hasn't quite explained why he doesn't want to do KVM which sounds like it would fit his requirements otherwise.

@MensaWater Yes I thought of that, but it doesn't harm to ask

"Humility is the refuge of the incompetent"

Interesting...

By that logic is not humor the refuge of the arrogant?

You'd have to ask Nero Wolfe but he is fictional. The author, Rex Stout, might have known but unfortunately he is dead.
(R.I.P Rex)

I truly enjoy the Nero Wolfe mysteries and have read most of them many times over. I read them not for the "mystery" but because both Nero Wolfe and his assistant (and narrator), Archie Goodwin, are both smart asses and say things that amuse me. Wolfe is certainly arrogant so admiring him may prove I am as well.

I picked that quote as a memorable one that was less controversial than other Wolfe utterances I could think of back when I first signed up for LQ.

The problem is isolation. Any connection leaves the ability to be a data issue. Only a real KVM would do. They do make KVM over ip and software kvm but you'd still have to connect by some transport.

Do they both have RS232 serial ports? Then PPP
Or yes, DDGoo: x11 over usb ports
Cool concept!!! Write us (future Internet seachers) a 'cookbook'

p.s. OR must data/connectivity be 'absolutely isolated'?
In that case, wouldn't even some KVM connection
be an isolation (security) violation[?]

Maybe a bit more info on degree of isolation...

I've never heard of any issue with a real hardware kvm being some security issue. It is simply a switch that allows input/output but only time will tell if some can hack it.