RDP through 2nd NIC Private LAN

sconnary32 · Oct 15, 2015

Good day all,

I am hoping that someone will understand what I am asking and have an understandable answer for me.

Windows 7
Dual NIC Mobo

Scenario:
I have two networks that are separate from each other. One network I am able to Remote into from home. I do not have access to RDP into the second network.
I have enabled the 2nd NIC on each PC and connected them via a cat6. If I turn on Mouse without Borders and configure the IP I am able to actually control both PC's as if they were on the same network.
What I want to try and figure out is how can I RDP through the private Lan (169.254.x.x/16) from one PC to the other and still use the network that the other PC is on.

RDP to PC1/LAN1 from home
RDP from PC1/LAN1 to PC2/LAN2 through private LAN
Use PC2 to perform administrative work on LAN2

I have read that windows is not very NIC friendly. I would also like to do this without adding additional 3rd party software.

Thanks for any suggestions,

Scott

Ralston18 · Oct 16, 2015

What is preventing RDP access into the second network?

It almost seems as if you are attempting to bypass some security configuration via the private LAN or the creation of that private LAN. Which PCs and where are the PC's with 2nd NICs being connected with Cat 6? I think PC1 and PC2 each with a dual NIC if I am following the physical setup correctly.

Not sure how straightforward a solution might be but the access issue to the second network, even if just a matter of convenience/inconvenience, needs to be addressed.

NerdIT · Oct 16, 2015

The only thing I can think of that would preventing RDP would be a NAT/PAT mis-configuration. Also ensure that TCP port 3389 and UDP port 3389 are allowed through host/router firewalls.

The two PCs should be able to communicate on their (assuming) private NIC2 to NIC2 network. Make sure you do not have multiple gate ways set. In fact, for the IPv4 setting on both NIC2s you should leave the default gateway blank. NIC1's on both PCs should have default gateways set as the router interface IP.

Also, make sure DHCP is turned off and/or configured correctly. And I would suggest not using an APIPA address (169.254.0.0/16 - 169.254.255.255/16) for your private LAN IP scheme.

Can you give more details about your IP scheme/settings, DHCP status, and maybe some tracert/ping screenshots?

Would like to help more.!

sconnary32 · Oct 17, 2015

NerdIT :

The only thing I can think of that would preventing RDP would be a NAT/PAT mis-configuration. Also ensure that TCP port 3389 and UDP port 3389 are allowed through host/router firewalls.

The two PCs should be able to communicate on their (assuming) private NIC2 to NIC2 network. Make sure you do not have multiple gate ways set. In fact, for the IPv4 setting on both NIC2s you should leave the default gateway blank. NIC1's on both PCs should have default gateways set as the router interface IP.

Also, make sure DHCP is turned off and/or configured correctly. And I would suggest not using an APIPA address (169.254.0.0/16 - 169.254.255.255/16) for your private LAN IP scheme.

Can you give more details about your IP scheme/settings, DHCP status, and maybe some tracert/ping screenshots?

Would like to help more.!

Thanks for this suggestion. I will hopefully be able to test it out this week.

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RDP through 2nd NIC Private LAN

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