What port does NetLogon use?

The Netlogon protocol uses TCP port 135 as well as dynamic RPC (Remote Procedure Call) ports, i.e. ports temporarily open on TCP port 49152-65536, or exchanges on an SMB channel (TCP port 445).

What is the use of port 135?

Port 135 exposes where DCOM services can be found on a machine. 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.

What is port 22 used for in Windows?

In this example, we will use the netstat command by providing some options. This will list all listening ports for the local system with their port numbers. We can also list listening ports according to their service name. Port 22 is SSH service and it will be named as ssh .

What ports does ADUC use?

AD uses the following ports to support user and computer authentication, according to the Active Directory and Active Directory Domain Services Port Requirements article:

  • SMB over IP (Microsoft-DS): port 445 TCP, UDP.
  • Kerberos: port 88 TCP, UDP.
  • LDAP: port 389 UDP.
  • DNS: port 53 TCP, UDP.
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27 окт. 2009 г.

What uses TCP port 445?

TCP port 445 is used for direct TCP/IP MS Networking access without the need for a NetBIOS layer. This service is only implemented in the more recent verions Windows starting with Windows 2000 and Windows XP. The SMB (Server Message Block) protocol is used among other things for file sharing in Windows NT/2K/XP.

What is port 139 commonly used for?

The port 139 is used for File and Printer Sharing but happens to be the single most dangerous Port on the Internet. This is so because it leaves the hard disk of a user exposed to hackers.

Why is port 139 open?

Port 139 is utilized by NetBIOS Session 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 139 in the Firewall.

What is the purpose of port 443?

GRC | Port Authority, for Internet Port 443. Description: This port is used for secure web browser communication. Data transferred across such connections are highly resistant to eavesdropping and interception.

What is port 8080 typically used for?

Port 8080 is an alternative to port 80 and is used primarily for http traffic. It is named 8080 for its correlation to 80. Port 8080 is commonly used as proxy and caching port. It is also above the service port range.

Is port 22 UDP or TCP?

Well-known ports

Port TCP Description
21 Yes File Transfer Protocol (FTP) control (command)
22 Yes Secure Shell (SSH), secure logins, file transfers (scp, sftp) and port forwarding
23 Yes Telnet protocol—unencrypted text communications
25 Yes Simple Mail Transfer Protocol (SMTP), used for email routing between mail servers
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What ports need to be open for DNS server?

A DNS server listens for requests on port 53 (both UDP and TCP). So all DNS requests are sent to port 53, usually from an application port (>1023).

What ports are needed for domain controller?

UDP Port 88 is used by clients and domain controllers to authenticate with each other. Both UDP and TCP Port 135 are required for communication between domain controllers and clients to domain controllers.

What are the port states determined by nmap?

It divides ports into six states: open, closed, filtered, unfiltered, open|filtered, or closed|filtered. These states are not intrinsic properties of the port itself, but describe how Nmap sees them.

Is port 139 required for SMB?

What Are Ports 139 And 445? SMB has always been a network file sharing protocol. As such, SMB requires network ports on a computer or server to enable communication to other systems. SMB uses either IP port 139 or 445.

Should I block port 445?

We also recommend blocking port 445 on internal firewalls to segment your network – this will prevent internal spreading of the ransomware. Note that blocking TCP 445 will prevent file and printer sharing – if this is required for business, you may need to leave the port open on some internal firewalls.

Does SMB use TCP or UDP?

Direct hosted NetBIOS-less SMB traffic uses port 445 (TCP and UDP). In this situation, a four-byte header precedes the SMB traffic.