SMB Share on multiple NICs, but can only connect privately to one of them.

[AeroMaestro]

My unRAID server has two different ethernet NICs:

eth0 is 1gbps, ip 192.168.1.xxx

eth1 is 2.5gbps, ip 192.168.2.xxx

I connect eth0 (1gbps) to a switch and it's used for general networking and internet.

I connect eth1 (2.5gbps) directly to my client computer (which dual-boots MacOS and windows)

I've been running all my SMB shares as public to keep my life simple, but would like--for obvious reasons--to change them over to Private.

So I created a new user in unraid, and that user has read/write access to all shares.

Then I created a new share (TestingShare) and setup SMB on that share with private security, and gave my (testuser) user read/write access.

 

When I try to connect to the share on eth1 (2.5gbps), it prompts me for a user/pass, but then I just get an error.  Windows and MacOS both fail to connect on 192.168.2.xxx.

 

But if I try to connect to the TestingShare on eth0 (1gbps, 192.168.1.xxx), I get the login prompt, and it connects just fine.

 

Frustratingly, I've always been able to connect without trouble to all of my shares over the eth1 (2.5gbps) connection when they're public. But changing them to private causes problems and I can only connect on eth0 (1gbps.)

 

Got any ideas how I could fix it?  I looked around the SMB settings and found: "Enable SMB Multi Channel:" I tried turning it on thinking this might help SMB fully work on both NICs, but that didn't make any difference.

Edited April 6, 2023 by AeroMaestro

[maxandcheese]

I just ran into a similar issue today. I have a second nic attached to a private lan with no gateway on it but I filled in the field IPv4 default gateway with 10.10.10.1. After removing this and keeping the field blank, I was finally able to connect to my smb share.