Manuals

Screenshot: 0x18 Pre-authentication information was invalid

0x18 Pre-authentication information was invalid which indicates the following condition: "Failure to obtain ticket, possibly due to the client providing the wrong password."

There are different types of events in the domain controller event log. All of them are very informative if you know the meanings. Kerberos events include IDs: 672, 673, 675, 676. To troubleshoot authentication problems or failure event logs you have to know how to translate the error codes of those events. You can turn on the event logging on a specific computer by following instructions on this page. Additional useful information is here.

A summary table goes below.

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Bit Split CIDR Netmask Blocksize Max Subnets Class C Class B Class A
2/6 /26 .192 64 2 62 16382 4096K
3/5 /27 .224 32 6 30 8190 2048K
4/4 /28 .240 16 14 14 4094 1024K
5/3 /29 .248 8 30 6 2046 512K
6/2 /30 .252 4 62 2 1022 256K
7/1 /31 .254 2 126 510 128K
8/0 /32 .255 1 254 254 64K