What protocol/service if any is required when mapping network drives? I'm running a software-based firewall to...
separate my two network segments and wish to better secure my network by only allowing those service needed to access computers on lets say segment_B. I'm currently allowing ICMP, UDP, TCP, FTP and RDP request through the firewall. If I set the security rule to allow for any service, mapping a drive from one netork to the next is not problem.
Windows 2000 is a different animal if using the new features and not older NT 4.0 features. Direct hosted "NetBIOS-less" SMB traffic uses port 445 (TCP and UDP). In this situation, a four-byte header precedes the SMB traffic. The first byte of this header is always 0x00, and the next three bytes are the length of the remaining data.
This is obvious. Microsoft no longer will support them.
What is NetBIOS?
Determining which TCP/IP services are needed
Infrastructure and Network Security