What is the protocol for port 137?

Service Name and Transport Protocol Port Number Registry

Service Name	Port Number	Transport Protocol
netbios-ns	137	tcp
netbios-ns	137	udp
trim	1137	tcp
trim	1137	udp

What is the use of port number 137?

Port 137 is utilized by NetBIOS Name service. Enabling NetBIOS services provide access to shared resources like files and printers not only to your network computers but also to anyone across the internet. Therefore it is advisable to block port 137 in the Firewall.

What are ports 137 and 138 used for?

Ports 137, 138, and 139 are used by NetBIOS, which does not support IPv6. CIFS is required for Windows file service. You can disable CIFS by issuing the cifs terminate command on your storage system console.

Is port 135 a NetBIOS?

NetBIOS provides three distinct services: Name service (NetBIOS-NS) for name registration and resolution via port 137….Workgroup VS Domain.

Port	Protocol	Service
135	TCP	MS-RPC endpoint mapper
137	UDP	NetBIOS Name Service
138	UDP	NetBIOS Datagram Service
139	TCP	NetBIOS Session Service

Should I disable port 135?

Hacker tools such as “epdump” (Endpoint Dump) can immediately identify every DCOM-related server/service running on the user”s hosting computer and match them up with known exploits against those services. Therefore, port 135 should not be exposed to the internet and must be blocked.

Does Windows 10 still use NetBIOS?

NetBIOS is a somewhat obsolete broadband protocol. Yet, despite its vulnerabilities, NetBIOS is still enabled by default for network adapters in Windows. Some users might prefer to disable the NetBIOS protocol.

Should I turn off NetBIOS?

There are many security concerns with NetBIOS; and disabling its support on your network and devices is strongly recommended. Disabling the use and support of NetBIOS can help to mitigate an attacker’s ability to: poison and spoof responses, obtain a user’s hashed credentials, inspect web traffic, etc.

What does port 137 mean in TCP / UDP protocol?

PORT 137 – Information Port Number: 137 TCP / UDP: UDP Delivery: No Protocol / Name: [Malware known as Msinit] netbios-ns Port Description: [malware info: Msinit] NETBIOS Name Service. A principle rqmt for NetBIOS services on MS hosts (Win9x/ME/NT/Win2000). Virus / Trojan: Yes, Caution!

How is UDP 137 used in NetBIOS services?

A principle rqmt for NetBIOS services on MS hosts (Win9x/ME/NT/Win2000). UDP 137 is used for browsing, logon sequence, pass-thru validations, printing support, trust support, WinNT Secure Channel, and WINS registration.Security Concerns: Key target in auth & DOS attacks.

What kind of protocol is NetBIOS for print sharing?

netbios-ns: NetBIOS is a protocol used for File and Print Sharing under all current versions of Windows. While this in itself is not a problem, the way that the protocol is implemented can be. NetBios services: NETBIOS Name Service (TCP/UDP: 137) NETBIOS Datagram Service (TCP/UDP: 138) NETBIOS Session Service (TCP/UDP: 139)

Is there a worm that runs on port 139?

W32.Reidana.A [ Symantec-2005-032515-4042-99] (2005.03.27) – worm that spreads using the MS DCOM RPC vulnerability (MS Security Bulletin [ MS03-026 ]) on port 139. The worm attempts to download and execute a remote file via FTP. Opens TCP port 4444. Windows Internet Naming Service (WINS) also uses this port (UDP).