[Samba] Windows 10 cannot connect without SMB1

cn at brain-biotech.de cn at brain-biotech.de
Mon Mar 1 15:20:30 UTC 2021

Am 01.03.21 um 16:04 schrieb K. R. Foley via samba:

> The firewall is disabled on the client PC. The client and the server are 
> on 2 separate subnets separated by a VPN. I am not aware of any 
> filtering going on between the two, but I can't say for sure without 
> checking. Is there a list of ports somewhere that I can check to make 
> sure that they are all being routed over the VPN? I have already checked 
> everything that I can see in netstat on the server.

Check this:

> Keep in mind that the client can join the domain fine if I enable SMB1 
> on the client. I don't want to use SMB1. That is why I am trying to 
> figure this out. The client seems to think that the server is asking for 
> SMB1.
> Is it possible that I have something else mis-configured on the client?
> Are there additional ports that are used by SMB2/3 that are not used by 
> SMB1? If so, what are they?

These are only for SMB1/Netbios

NetBIOS Name Service 	137 	udp
NetBIOS Datagram 	138 	udp
NetBIOS Session 	139 	tcp

For smb2-3 you need

SMB over TCP 	445 	tcp



Dr. Christian Naumer
Vice President
Unit Head Bioprocess Development

B.R.A.I.N Aktiengesellschaft
Darmstaedter Str. 34-36, D-64673 Zwingenberg
e-mail cn at brain-biotech.com, homepage www.brain-biotech.com
phone +49-6251-9331-30 / fax +49-6251-9331-11

Sitz der Gesellschaft: Zwingenberg/Bergstrasse
Registergericht AG Darmstadt, HRB 24758
Vorstand: Adriaan Moelker (Vorstandsvorsitzender), 
Lukas Linnig
Aufsichtsratsvorsitzender: Dr. Georg Kellinghusen

More information about the samba mailing list