The fact you're seeing this service and port suggests you may be scanning a Domain Controller, for which both UDP & TCP ports 464 are used by the Kerberos Password Change. This port in particular is used for changing/setting passwords against Active Directory.Kerberos Network Ports
Machine
Local port (server)
Description
All KDCs
4444/udp
Kerberos 5 to 4 ticket conversion service
All KDCs
749/tcp
Kerberos 5 administration service (MIT and Heimdal)
Master/Administrative KDC
464/udp
Kerberos 5 password changing service (older password-changing protocol)
port 53
The standard port for DNS is port 53. DNS client applications use the DNS protocol to query and request information from DNS servers, and the server returns the results to the client using the same port. Port 53 is used for both TCP and UDP communication.
What is port 446 : As a server processing TCP/IP connection requests for DRDA SQL applications, Db2 uses a server port or the well-known port, 446, which is used for relational database communications. A server resynchronization port is used for processing 2-phase commit resynchronization requests.
What does Kerberos do
A Kerberos is a system or router that provides a gateway between users and the internet. Therefore, it helps prevent cyber attackers from entering a private network. It is a server, referred to as an “intermediary” because it goes between end-users and the web pages they visit online.
Is Kerberos TCP or UDP : UDP protocol
Kerberos is primarily a UDP protocol, although it falls back to TCP for large Kerberos tickets. This may require special configuration on firewalls to allow the UDP response from the Kerberos server (KDC). Kerberos clients need to send UDP and TCP packets on port 88 and receive replies from the Kerberos servers.
UDP port 88
Kerberos uses UDP port 88 by default. The default ports used by Kerberos are port 88 for the KDC1 and port 749 for the admin server. You can, however, choose to run on other ports, as long as they are specified in each host's /etc/services and krb5.
What is port 445
Port 445 is a Microsoft networking port which is also linked to the NetBIOS service present in earlier versions of Microsoft Operating Systems. It runs Server Message Block (SMB), which allows systems of the same network to share files and printers over TCP/IP. This port shouldn't be opened for external network.With DNS over HTTPS (DoH), DNS queries and responses are encrypted and sent via the HTTP or HTTP/2 protocols. DoH ensures that attackers cannot forge or alter DNS traffic. DoH uses port 443, which is the standard HTTPS traffic port, to wrap the DNS query in an HTTPS request.The port 444 is standard for SNPP servers, and it is free to use from the sender's point of view. Maximum message length can be carrier-dependent. Overpass-the-hash, silver ticket and golden ticket attacks are used by attackers to obtain illegitimate tickets that can then be used to access services using Kerberos without knowing any password.
What is the TCP port of Kerberos : Kerberos is primarily a UDP protocol, although it falls back to TCP for large Kerberos tickets. This may require special configuration on firewalls to allow the UDP response from the Kerberos server (KDC). Kerberos clients need to send UDP and TCP packets on port 88 and receive replies from the Kerberos servers.
What is Kpasswd port 464 : KPASS is used on TCP Port 464 for Kerberos based password changes. Starting in Vista, Microsoft used this as the default password change method. However, if KPASS is not accessible (as in the port is closed), it will default back to NTLM for password changes.
Is Kerberos same as SSL
SSL is not part of the Kerberos protocol, but software that uses Kerberos for client and server authentication may use SSL as well. Attacks Against Port 445 In the Past
Hackers have used port 445 to infiltrate devices on a network, most famously by the WannaCry ransomware attack. They do this by scanning services that use the port, which allows them to gather sensitive information about devices on the network.HTTPS Port 443 is an essential component of secure website communication. It is the default port for HTTPS, the secure version of the HTTP protocol. By using Port 443, HTTPS encrypts the data transmitted between a user's browser and a website, safeguarding sensitive information from potential attackers.
What port is 445 : Port 445 is a Microsoft networking port which is also linked to the NetBIOS service present in earlier versions of Microsoft Operating Systems. It runs Server Message Block (SMB), which allows systems of the same network to share files and printers over TCP/IP. This port shouldn't be opened for external network.
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Antwort What port is 464? Weitere Antworten – What is port 464 used for
The fact you're seeing this service and port suggests you may be scanning a Domain Controller, for which both UDP & TCP ports 464 are used by the Kerberos Password Change. This port in particular is used for changing/setting passwords against Active Directory.Kerberos Network Ports
port 53
The standard port for DNS is port 53. DNS client applications use the DNS protocol to query and request information from DNS servers, and the server returns the results to the client using the same port. Port 53 is used for both TCP and UDP communication.
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What is port 446 : As a server processing TCP/IP connection requests for DRDA SQL applications, Db2 uses a server port or the well-known port, 446, which is used for relational database communications. A server resynchronization port is used for processing 2-phase commit resynchronization requests.
What does Kerberos do
A Kerberos is a system or router that provides a gateway between users and the internet. Therefore, it helps prevent cyber attackers from entering a private network. It is a server, referred to as an “intermediary” because it goes between end-users and the web pages they visit online.
Is Kerberos TCP or UDP : UDP protocol
Kerberos is primarily a UDP protocol, although it falls back to TCP for large Kerberos tickets. This may require special configuration on firewalls to allow the UDP response from the Kerberos server (KDC). Kerberos clients need to send UDP and TCP packets on port 88 and receive replies from the Kerberos servers.
UDP port 88
Kerberos uses UDP port 88 by default.
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The default ports used by Kerberos are port 88 for the KDC1 and port 749 for the admin server. You can, however, choose to run on other ports, as long as they are specified in each host's /etc/services and krb5.
What is port 445
Port 445 is a Microsoft networking port which is also linked to the NetBIOS service present in earlier versions of Microsoft Operating Systems. It runs Server Message Block (SMB), which allows systems of the same network to share files and printers over TCP/IP. This port shouldn't be opened for external network.With DNS over HTTPS (DoH), DNS queries and responses are encrypted and sent via the HTTP or HTTP/2 protocols. DoH ensures that attackers cannot forge or alter DNS traffic. DoH uses port 443, which is the standard HTTPS traffic port, to wrap the DNS query in an HTTPS request.The port 444 is standard for SNPP servers, and it is free to use from the sender's point of view. Maximum message length can be carrier-dependent.
![]()
Overpass-the-hash, silver ticket and golden ticket attacks are used by attackers to obtain illegitimate tickets that can then be used to access services using Kerberos without knowing any password.
What is the TCP port of Kerberos : Kerberos is primarily a UDP protocol, although it falls back to TCP for large Kerberos tickets. This may require special configuration on firewalls to allow the UDP response from the Kerberos server (KDC). Kerberos clients need to send UDP and TCP packets on port 88 and receive replies from the Kerberos servers.
What is Kpasswd port 464 : KPASS is used on TCP Port 464 for Kerberos based password changes. Starting in Vista, Microsoft used this as the default password change method. However, if KPASS is not accessible (as in the port is closed), it will default back to NTLM for password changes.
Is Kerberos same as SSL
SSL is not part of the Kerberos protocol, but software that uses Kerberos for client and server authentication may use SSL as well.
![]()
Attacks Against Port 445 In the Past
Hackers have used port 445 to infiltrate devices on a network, most famously by the WannaCry ransomware attack. They do this by scanning services that use the port, which allows them to gather sensitive information about devices on the network.HTTPS Port 443 is an essential component of secure website communication. It is the default port for HTTPS, the secure version of the HTTP protocol. By using Port 443, HTTPS encrypts the data transmitted between a user's browser and a website, safeguarding sensitive information from potential attackers.
What port is 445 : Port 445 is a Microsoft networking port which is also linked to the NetBIOS service present in earlier versions of Microsoft Operating Systems. It runs Server Message Block (SMB), which allows systems of the same network to share files and printers over TCP/IP. This port shouldn't be opened for external network.