Kerberos
Kerberos is a computer-network authentication protocol that works on the basis of tickets to allow nodes communicating over a non-secure network to prove their identity to one another in a secure manner. Kerberos uses UDP port 88 by default
At least two implementations are available, [Heimdal]( https://www.h5l.org/) and [MIT](https://web.mit.edu/kerberos/).
OpenSSH implements Kerberos support since early versions.
A Kerberos realm is the domain over which a Kerberos authentication server has the authority to authenticate a user, host or service. A realm name is often, but not always the upper case version of the name of the DNS domain over which it presides.
Configuration files
Commands
Activities
- Install Kerberos KDC Server and Client in Linux:
apt install krb5-kdc krb5-admin-server krb5-config -y[2] - Understand why time synchronization and DNS plays an important role in order to work KDC properly[3]
- Read about SPNEGO
Related terms
See also
- AAA, Kerberos, KDC,
kinit, klist, ktutil, /etc/krb5.conf, krb5-workstation, pam_krb5 - AAA: Authc, Authz, Password policy, OAuth, OpenID, OIDC, LDAP, RADIUS, TACACS+, XTACACS, SAML, Secure LDAP, IEEE 802.1X, CHAP, RBAC, MFA, SCIM, Amazon Cognito
- OpenSSH:
ssh-keygen
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