outbound port 137 from my computer to websites - Ars

Port(s) Protocol Service Details Source; 137 : tcp,udp: netbios-ns: NetBIOS is a protocol used for File and Print Sharing under all current versions of Windows. So Microsoft grabbed a trio of three successive Internet ports 137, 138, and 139, to use for the transport of their existing NetBIOS protocol over IP-based LAN and WAN networks. The horrors of insecurity resulting from Microsoft's exposure of their NetBIOS protocol to the Internet are legendary. This is a list of TCP and UDP port numbers used by protocols of the Internet protocol suite for operation of network applications. The Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP) needed only one port for full-duplex, bidirectional traffic. Because protocol UDP port 137 was flagged as a virus (colored red) does not mean that a virus is using port 137, but that a Trojan or Virus has used this port in the past to communicate. UDP 137 – Disclaimer. We do our best to provide you with accurate information on PORT 137 and work hard to keep our database up to date. This is a free Astaro v8.03, Tons of packages blocked from my Computer to the internal Lan via the UDP 137. Port 137 is netbios. Mar 29, 2020 · SMB uses either IP port 139 or 445. Port 139: SMB originally ran on top of NetBIOS using port 139. NetBIOS is an older transport layer that allows Windows computers to talk to each other on the same network. Port 445: Later versions of SMB (after Windows 2000) began to use port 445 on top of a TCP stack. Using TCP allows SMB to work over the Frequently, the 16th octet, called the NetBIOS Suffix, designates the type of resource, and can be used to tell other applications what type of services the system offers. In NBT, the name service operates on UDP port 137 (TCP port 137 can also be used, but rarely is). The name service primitives offered by NetBIOS are:

Provides: + Name Service (Port 137/UDP) + Datagram Service (Port 138/UDP) + Session Service (Port 139/TCP) SMB runs on top of NetBIOS 2.1 Windows Internet Naming Service (WINS)

Communication Ports Used by Citrix Technologies

Port 137 (tcp/udp) - Online TCP UDP port finder - adminsub.net

DoS Attacks in Logs - NETGEAR Communities [DoS Attack: SYN/ACK Scan] from source:, port 80, Saturday, July 01, 2017 20:04:30 [DoS Attack: SYN/ACK Scan] from source:, port 80, Saturday, July 01, 2017 20:04:29 . These two right here shut off my internet for about 2 minutes. I … TCP 137 - Port Protocol Information and Warning!