Samba implements NetBIOS, as does MS Windows NT/200x/XP, by encapsulating it over TCP/IP. NetBIOS-based networking uses broadcast messaging to effect browse list management. When running NetBIOS over TCP/IP, this uses UDP-based messaging. UDP messages can be broadcast or unicast. Normally, only unicast UDP messaging can be forwarded by routers.

On both interfaces, the ports 139/tcp and 445/tcp are opened. For further information on the output, see the netstat (8) manual page. To bind Samba to specific interfaces, see Configure Samba to Bind to Specific Interfaces. Samba PDC Port Usage Samba Server Security UDP/137 - used by nmbd UDP/138 - used by nmbd TCP/139 - used by smbd TCP/445 - used by smbd The last one is important as many older firewall setups may not be aware of it, given that this port was only added to the protocol in recent years. Using a IPC$ share deny Samba (software) - Wikipedia Samba is a free software re-implementation of the SMB networking protocol, and was originally developed by Andrew Tridgell.Samba provides file and print services for various Microsoft Windows clients and can integrate with a Microsoft Windows Server domain, either as a Domain Controller (DC) or as a domain member. As of version 4, it supports Active Directory and Microsoft Windows NT domains. GRC | Port Authority, for Internet Port 139

The TCP ports 139 and the new port 445 used by Windows 2000, and the Samba 3.0 alpha code in particular, should never be exposed to untrusted networks, the group said.

[SOLVED] samba is not listening on port 135 (Endpoint Sep 21, 2018 How-To Guide – Internal Port Forwarding on Linux using the

Jan 07, 2018

Samba Server Security