Domain Controller Kerberos Check

Every domain controller in an active directory domain runs a kdc kerberos distribution center service which handles all kerberos ticket requests.

Domain controller kerberos check. The krbtgt account is one that has been lurking in your active directory environment since it was first stood up. Do understand that kerberoasting makes it trivial for an attacker to determine your weak service account passwords when issued a service ticket encrypted with rc4. Launch the tool using a domain account preferably with an account that has sufficient privileges to create spns in your active directory.

The domain controller sends back the authentication ticket and a session key that s been encrypted with the client s personal key in this case the user s password. See the below picture. The server then sends the appropriated response back to the client.

It compares the encrypted challenge with the response by the client in step 4. The client decrypts the session key with it s personal key. If they are identical authentication is successful and the domain controller notifies the server.

Only the kerberos service krbtgt in the domain can open and read tgt data. Kerberos issues an authentication ticket when a client first authenticates itself to the domain controller. If they are still being issued with rc4 check the pwdlastset attribute on the krbtgt account and determine if it is newer than the created date of your read only domain controllers group.

The kdc uses the domain s active directory domain services database as its security account database. The tgt is encrypted signed delivered to the user as rep. The domain controller kdc checks user information logon restrictions group membership etc creates ticket granting ticket tgt.

Using kerberos configuration manager to diagnose and fix spn and delegation issues. Microsoft has released out of band optional updates to fix a known issue that causes kerberos authentication problems on enterprise domain controllers after installing security updates released. Click on flag icon showing yellow warning sign on top right click on promote the server to a domain controller in deployment configuration click on add a new forest set dsrm administrator password click next verify netbios and change if needed i did not change it in my case keep the location of.