Port 749: kerberos-adm
Port 749 is the Kerberos administration port, used by admin tools to manage principals and policies on the Key Distribution Center. It is a privileged management channel and should be limited to admin hosts.
TCPAuthenticationUnencrypted by defaultIANA assigned
| Port number | 749 |
|---|---|
| Service | Kerberos administration |
| Protocol | TCP |
| Category | Authentication |
| Default encryption | No |
Security note. Port 749 is not encrypted by default. Restrict it to trusted networks, or use an encrypted alternative where one exists, to avoid exposing credentials and data in transit.
Frequently asked questions
What is port 749 used for?
Port 749 is the Kerberos administration port, used by admin tools to manage principals and policies on the Key Distribution Center. It is a privileged management channel and should be limited to admin hosts.
Is port 749 TCP or UDP?
Port 749 (kerberos-adm) uses TCP.
Is port 749 secure?
Port 749 is not encrypted by default. Where possible, use an encrypted alternative or tunnel it over TLS or a VPN.
Should I open port 749 on my firewall?
Only if you specifically need kerberos-adm. Expose it to the smallest set of trusted sources, and never open database or Windows-service ports to the whole internet.