Hi, When applying the command, net ads keytab add HTTP -U administrator One warning:- Warning: "kerberos method" must be set to a keytab method to use keytab functions. ==================================================================== Also see below:- [root@lx hooks]# ktutil ktutil: rkt /etc/krb5.keytab rkt: Unsupported key table format version number while reading keytab "/etc/krb5.keytab" ktutil: cat /etc/krb5.conf ================= [logging] default = FILE:/var/log/krb5libs.log kdc = FILE:/var/log/krb5kdc.log admin_server = FILE:/var/log/kadmind.log [libdefaults] default_realm = SYSNET.LOCAL dns_lookup_realm = false dns_lookup_kdc = false ticket_lifetime = 24h renew_lifetime = 7d forwardable = true default_keytab_name = /etc/krb5.keytab ; for Windows 2003 # default_tgs_enctypes = rc4-hmac des-cbc-crc des-cbc-md5 # default_tkt_enctypes = rc4-hmac des-cbc-crc des-cbc-md5 # permitted_enctypes = rc4-hmac des-cbc-crc des-cbc-md5 ; for Windows 2008 with AES default_tgs_enctypes = aes256-cts-hmac-sha1-96 rc4-hmac des-cbc-crc des-cbc-md5 default_tkt_enctypes = aes256-cts-hmac-sha1-96 rc4-hmac des-cbc-crc des-cbc-md5 permitted_enctypes = aes256-cts-hmac-sha1-96 rc4-hmac des-cbc-crc des-cbc-md5 ; for MIT/Heimdal kdc no need to restrict encryption type [realms] SYSNET.LOCAL = { kdc = dc1.sysnet.local admin_server = dc1.sysnet.local kdc = 192.168.15.40 } [domain_realm] .sysnet.local = SYSNET.LOCAL sysnet.local = SYSNET.LOCAL -----Original Message----- From: sichent [mailto:sichent@xxxxxxx] Sent: Sunday, June 24, 2012 7:57 PM To: squid-users@xxxxxxxxxxxxxxx Subject: Re: Squid Kerberos authentication error Hi, May be this is of any help? (it uses centos 6 and ad 2008 and samba NOT mskutils) http://www.howtoforge.com/web-filtering-on-squid-3-with-quintolabs-content-s ecurity-1.4-and-windows-active-directory-integration On 24.06.2012 15:06, Navas wrote: > One more thing I am using Samba, I could not use mskutil. Is there any > issue with Kerberos and Samba. > OS: Redhat EL6.2 > squid-3.1 >