Windows 10: W10p asks for user/pass only when mapping share from other subnet.

For some explicable reason, windows has decided to no longer accept access to it's shared folder from other subnets, and no one appears to know why. I have asked high and low and no one has the foggiest idea what's going on.


1. Short version: If i map "\\x.x.x.x\files" from the same subnet, explorer will map it, no questions asked and everything works. If i do the same from another subnet i am asked to provide user/pass, which i can't because there isn't any. This only happens when mapping from another subnet and never happens when mapping from same subnet.


2. Setup. Windows 10 pro 1909.

1909 or possible earlier version broke network sharing and required clients to edit gpedit and activate "allow insecure guest logon".


Folder is shared, permissions are "everyone" and have been given "full control".

settings/network/network and sharing center/edit advanced sharing settings

Private profile: All machines are using this profile.

Network registration = on

activate automatic config for devices with network access = on

File and printer sharing = on

All networks

Use 128-bit encryption = on

password protected file sharing = off


Firewall, this i am unsure what effects have as it was a suggestion made from another thread i found.

The default settings for these, properties/scope/external IP are all set to "local subnet" by default.

smb-in

nb-datagram-in

nb-name-in

nb-session-in

For all of them i have added 10.x.x.x/24 to the list, this has made no difference. Local IP is set to "all ip's". I am unsure about what defines local and external. To me local is lan ip's and external are wan or possibly external subnet ip's. This is apparently not the case as "local subnet" is default under external ip.


Logbook/logfile for programs and services/microsoft/windows/smbserver/security creates two entries when trying to connect from other subnet

Event ID 551

Permission error in smb-session

Username: NT AUTHORITY\ANONYMOUS LOGON

Status: access denied


Event ID 1009

server denied anonymous access to client


So there's clear evidences that both host and client machines are seeing and responding to each other, but for some reason the client machine is being asked for user/pass, this even tho every setting on the host machine that should allow the connection without asking for user/pass is set that way.


Any ideas?

:)

 

Can't map a network share with a different user/pass. Just refreshes.


First of all, before I tried mapping again, I cleared all of the credential related to my server using the credential manager. I also did "net use * /d" as suggested from the online research that I've done. I also rebooted my computer after all of this. Now, last thing I did to my computer was change the wifi card. I am assuming this might be the one causing the problem because I might still have some cached credentials from that wifi card(from registry). I'm able to map the network drive using the ip address, but not the netbios name. Whenever I map it(I tick the "connect using different credentials"), it would attempt to connect then it would refresh, then ask again for the user/pass. I'll get an error after that("cant map drive, already mapped with different credentials"). I'll attach a vid showing what Im saying.

2017-07-24 01-24-23 - Streamable

 

sharing netbios without password across subnets


I have shared files between 2 laptops on my homenetwork (1 subnet) without password.
I have read netbios can also share across subnets if you place a hostfile with the mapping hostname-ipnr on the client.
My question is, if bios can share across subnets, isn't it dangerous to share without password because someone can share your files from the internet?

 

cannot open files on network shared drive

Is the remote shared folder mapped? Do you have a drive letter assigned to it?
I'd suggest calling the software developer and asking them.