What is NetBIOS? Does Windows need its ports 137 and 138 open?
UDP port 137 (name services) UDP port 138 (datagram services) TCP port 139 (session services) NetBIOS over TCP/IP is specified by RFC 1001 and RFC 1002. The Netbt.sys driver is a …
Why would a Windows machine scan for port 137? - Super User
2018年3月21日 · The port 137 can be utilized by TCP or UDP. In this case, the "nbname" is used for the Name Service, name broadcasts for building browsing lists. 3 ports will be used in this …
Does communication through UDP Port 137 always mean there is …
2012年5月31日 · No, you cannot assume all UDP/137 traffic is a port-scan; that could be legitimate NetBios over TCP/IP traffic. I have a corporate laptop from my employer, and I am …
NetBIOS packet probing (port 137). Does it come from the router?
2016年4月27日 · DST Port 137 (NetBIOS) packets coming from router's IP. Does the router have some weird "extras" with NetBIOS, or is it an outsider? Invalid unsolicited packets with !!??!! …
What ports do I have to open for SMB sharing? - Super User
2015年9月18日 · The ports are UDP\137-138 and TCP\137,139,445. Make sure NetBIOS over TCP is explicitly specified, and failing that, a WINS server may be helpful, but only do this if …
Why does my firewall block outgoing TCP/UDP port 137 - Super …
2016年2月1日 · I've got a Draytek Vigor 2930 router which has a default xNetBios -> DNS which blocks "TCP/UDP, Port: from 137~139 to 53~undefined".
What port or ports are used for File sharing in windows?
2022年12月10日 · If the server has NBT enabled, it listens on UDP ports 137, 138, and on TCP ports 139, 445. If it has NBT disabled, it listens on TCP port 445 only. And this site (archived) …
Incoming port 137 problem - Sophos Community
Incoming port 137 problem emoore over 15 years ago There is an online MMORPG game, "Chronicles of Spellborn", that when launched on a machine on the LAN, is trying to create an …
Unknown IP attempted access to UDP port - Super User
2020年4月20日 · I am checking up on my antivirus software (McAffee) and noticed in my security history it says: The PC 192.168.0.45 tried to access your system port UDP port 137. If you …
networking - Difference between NetBIOS and SMB - Super User
*My quick guess is that while netbios-ssn simply provides the NetBIOS API, including NBT (NetBIOS over TCP/IP) via port 139. On the other hand, microsoft-ds provides the direct …