Win10 VB host, Linux Mint guest cannot connect via rdp

Discussions about using Linux guests in VirtualBox.
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Axe
Posts: 6
Joined: 27. Apr 2021, 16:20

Win10 VB host, Linux Mint guest cannot connect via rdp

Post by Axe »

I have Windows 10 pro desktop (192.168.0.40) running VirtualBox 7 as the host with a Linux Mint guest. It's set up for RDP port 3400 with a bridged network. If I use RDP on the host computer (192.168.0.40:3400), I can connect straight into the guest with no problems whatsoever. However, if I go to my laptop (192.168.0.70) and try to connect to the Linux Mint guest (192.168.0.40:3400), it won't connect at all. What gives? When I used Linux as the host, I never had any connection issues. Is Windows 10 firewall blocking the traffic?

Update: I turned off Windows 10 firewall for Guest or Public Networks and was able to connect to the VM. Now I just have to figure out how to open up the correct port. If there are any suggestions, that would be great.
scottgus1
Site Moderator
Posts: 20945
Joined: 30. Dec 2009, 20:14
Primary OS: MS Windows 10
VBox Version: VirtualBox+Oracle ExtPack
Guest OSses: Windows, Linux

Re: Win10 VB host, Linux Mint guest cannot connect via rdp

Post by scottgus1 »

Axe wrote:I turned off Windows 10 firewall for Guest or Public Networks and was able to connect to the VM.
This one is a puzzle. Bridged is supposed to go around the host firewall, so normally no ports have to be opened in a host firewall to access a Bridged VM.
Axe wrote:I turned off Windows 10 firewall for Guest or Public Networks
What this means to me is that your host was set to recognize the 192.168.0.# network as a Guest or Public network. Rules set for Public networks don't get applied on a Private network. I've always had my LAN set as a Private network, then I get the correct Bridged behavior above.

Check what your computer thinks your network is, in the Network settings.
Axe
Posts: 6
Joined: 27. Apr 2021, 16:20

Re: Win10 VB host, Linux Mint guest cannot connect via rdp

Post by Axe »

That did the trick! My network was set to Public. After I switched it to Private, I was able to connect with the Firewall turned on.
scottgus1
Site Moderator
Posts: 20945
Joined: 30. Dec 2009, 20:14
Primary OS: MS Windows 10
VBox Version: VirtualBox+Oracle ExtPack
Guest OSses: Windows, Linux

Re: Win10 VB host, Linux Mint guest cannot connect via rdp

Post by scottgus1 »

Excellent! Glad you're up and running. This interesting quirk has been put in Virtualbox Networks: In Pictures: Bridged Adapter.
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