How to allow or block access to ports using Kaspersky

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. 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 Port Authority Edition - Internet Vulnerability Profiling by Steve Gibson, Gibson Research Corporation. Goto Port 136: Probe Port 137: Enter Port: 0-65535: Goto Port 138: Port Authority Database Port 137. Name: netbios-ns: Purpose: NetBIOS Name Service: Description: Astaro v8.03, Tons of packages blocked from my Computer 192.168..2 to the internal Lan 192.168..255 via the UDP 137. Port 137 is netbios. 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 kernel -mode component that supports the TDI interface.

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Blocking ports 137 to 139 (NetBIOS) is fine, if you have no requirement to share files or printers between PC's on a LAN, (if you have a single PC) Blocking port 135 RPC/DCOM is probably also fine in a single PC environment but blocking this port in a LAN environment can cause unforeseen consequences.

Turning off File and print sharing alone won't get rid of it (that is TCP port 139 and 445 IIRC). UDP port 137 is NetBIOS name resolution, i think.

Dec 01, 2010 · UDP 137 is used by NetBIOS File sharing in Windows 7. Depending on what you do while you are using Remote Desktop on your network, it might invoke the UDP137. If it does not impede anything functional that you need to do, leave it alone. The firewall Job is to block aspects of Network traffic. You do not have to feel "sorry" for it doing its Job. Jun 05, 2006 · Ports 137-139 are NetBios ports which are used for file and printer sharing across a LAN. So if you are behind a router, trust your network, and need to share files or printers, then they should be open. However, these ports are exploited by several malwares, and also if open can allow a cracker access to your pc and files In Windows 2000, Microsoft has created a new transport for SMB over TCP and UDP on port 445. This replaces the older implementation that was over ports 137, 138, 139. Your Pix should be by default be blocking these inbound.