Apache 在 keytab 文件中找不到 kerberos 主體

虛擬主機已經配置了這些選項；

AuthType Kerberos
AuthName "Kerberos Login"
KrbMethodNegotiate On
KrbMethodK5Passwd Off
KrbAuthRealms EXAMPLE.COM
KrbAuthoritative On
KrbServiceName HTTP/something.example.com@EXAMPLE.COM
Krb5KeyTab /path/to/krb/site.keytab
require valid-user

site.keytab 可以被 apache 讀取，並且包含一個有效的主體；

root@pa2# klist -k /path/to/krb/site.keytab
Keytab name: FILE:/path/to/krb/site.keytab
KVNO Principal
---- --------------------------------------------------------------------------
 13 HTTP/something.example.com@EXAMPLE.COM (des-cbc-crc)
 13 HTTP/something.example.com@EXAMPLE.COM (des-cbc-md5)
 13 HTTP/something.example.com@EXAMPLE.COM (arcfour-hmac)
 13 HTTP/something.example.com@EXAMPLE.COM (aes256-cts-hmac-sha1-96)
 13 HTTP/something.example.com@EXAMPLE.COM (aes128-cts-hmac-sha1-96)
root@pa2# kvno -k /path/to/krb/site.keytab HTTP/something.example.com@EXAMPLE.COM
HTTP/something.example.com@EXAMPLE.COM: kvno = 13, keytab entry valid

但是當我嘗試訪問該站點時，我在 apache 錯誤日誌中得到了這個錯誤；

[Mon Mar 21 10:30:37.846616 2016] [auth_kerb:error] [pid 11217] [client ...:60195]
gss_accept_sec_context() failed: Unspecified GSS failure.
Minor code may provide more information
(, Cannot find key for HTTP/something.example.com@EXAMPLE.COM kvno 5 in keytab)

目前的kvno確實不是5。

在客戶端 windows 電腦上發布klist purge解決了 kvno 問題。

引用自：https://serverfault.com/questions/765027