I wonder why `net ads keytab add HTTP` doesn't change the keytab. The output of this command is: <pre>Warning: "kerberos method" must be set to a keytab method to use keytab functions. Processing principals to add...</pre> and exit code is 0, so there is no sign of an error. I sniffed network traffic while running this command and found that there was an LDAP search query and the result contained this computer's entry which has servicePrincipalName with 4 values and HTTP/squidsrv.my.doma.in is there. Unfortunately, this service principal didn't appear in keytab. On Sun, Nov 3, 2013 at 4:20 AM, Markus Moeller <huaraz@xxxxxxxxxxxxxxxx> wrote: > Exactly you need the HTTP service principal in the keytab. > > Regards > Markus > > > "Mihail Lukin" wrote in message > news:CAAmm_rYG0GiLjvaT50eeFL4JTzU9Ux0k01CvDCXH7D5H2C=0uQ@xxxxxxxxxxxxxx... > > > Thanks for the tip! > > Here is what it shows: > Server Name (Service and Instance): HTTP/squidsrv.my.doma.in > > So, it is the right protocol and host name. But I do not see exact > much in keytab. I'm not sure if it is the issue. I created keytab > exactly as was shown here: > http://wiki.squid-cache.org/ConfigExamples/Authenticate/Kerberos#Create_keytab > (samba version, not msktutil). > > > On Sun, Nov 3, 2013 at 1:29 AM, Markus Moeller <huaraz@xxxxxxxxxxxxxxxx> > wrote: >> >> Hi Mihail, >> >> If you use wireshark you can expand the details of: >> >> Proxy-Authorization: Negotiate YIIHoAYGKwYBB... >> >> It will tell you which service principal the client is sending to the >> server ? I wonder if the name matches the names in your keytab. >> >> >> Markus >> >> -----Original Message----- From: Mihail Lukin >> Sent: Saturday, November 02, 2013 9:15 PM >> To: Markus Moeller >> Cc: squid-users >> Subject: Re: Re: squid_kerb_auth: Unspecified GSS failure >> (W2K8) >> >> >> Hi, Markus! >> >> 1) Here is the output: >> Keytab name: FILE:/etc/squid/HTTP.keytab >> KVNO Timestamp Principal >> ---- ----------------- >> -------------------------------------------------------- >> 2 10/30/13 14:14:09 host/squidsrv.my.doma.in@xxxxxxxxxx (des-cbc-crc) >> 2 10/30/13 14:14:09 host/squidsrv.my.doma.in@xxxxxxxxxx (des-cbc-md5) >> 2 10/30/13 14:14:09 host/squidsrv.my.doma.in@xxxxxxxxxx (arcfour-hmac) >> 2 10/30/13 14:14:09 host/squidsrv.my.doma.in@xxxxxxxxxx >> (aes128-cts-hmac-sha1-96) >> 2 10/30/13 14:14:09 host/squidsrv.my.doma.in@xxxxxxxxxx >> (aes256-cts-hmac-sha1-96) >> 2 10/30/13 14:14:09 host/squidsrv@xxxxxxxxxx (des-cbc-crc) >> 2 10/30/13 14:14:09 host/squidsrv@xxxxxxxxxx (des-cbc-md5) >> 2 10/30/13 14:14:09 host/squidsrv@xxxxxxxxxx (arcfour-hmac) >> 2 10/30/13 14:14:09 host/squidsrv@xxxxxxxxxx (aes128-cts-hmac-sha1-96) >> 2 10/30/13 14:14:09 host/squidsrv@xxxxxxxxxx (aes256-cts-hmac-sha1-96) >> 2 10/30/13 14:14:09 SQUIDSRV$@MY.DOMA.IN (des-cbc-crc) >> 2 10/30/13 14:14:10 SQUIDSRV$@MY.DOMA.IN (des-cbc-md5) >> 2 10/30/13 14:14:10 SQUIDSRV$@MY.DOMA.IN (arcfour-hmac) >> 2 10/30/13 14:14:10 SQUIDSRV$@MY.DOMA.IN (aes128-cts-hmac-sha1-96) >> 2 10/30/13 14:14:10 SQUIDSRV$@MY.DOMA.IN (aes256-cts-hmac-sha1-96) >> >> 2) I see request header "Proxy-Authorization: Negotiate YIIHoAYGKwYBB..." >> 3) It worth to mention that using ntlm_auth instead of squid_kerb_auth >> works fine on this server. >> >> >> On Fri, Nov 1, 2013 at 1:45 AM, Markus Moeller <huaraz@xxxxxxxxxxxxxxxx> >> wrote: >>> >>> >>> Hi Mihail, >>> >>> What does a klist -ekt <keytab> show ? ( I assume you use MIT Kerberos >>> on >>> the squid server) >>> >>> What do you see with wireshark in the authentication header send to >>> squid >>> ? >>> >>> Markus >>> >>> "Mihail Lukin" wrote in message >>> >>> news:CAAmm_rZHZ8m1VbYF5mVW-ZbQYvOQhW0Nmf4saOp8GsY5x9KVJQ@xxxxxxxxxxxxxx... >>> >>> >>> I don't know why access-time is not being updated, but strace has >>> shown that keytab is being read successfully by squid_kerb_auth >>> process. >>> >>> On Thu, Oct 31, 2013 at 8:15 AM, Mihail Lukin <mihail.lukin@xxxxxxxxx> >>> wrote: >>>> >>>> >>>> >>>> Hello, Markus! >>>> >>>> Sorry for not mentioning it at once, KRB5_KTNAME is being exported in >>>> /etc/sysconfig/squid and is readable by squid group. But there is >>>> still something wrong with it: keytab's access time is not changed >>>> neither when I restart squid not when I request an URL through the >>>> proxy. >>>> >>>> I think I should strace squid_kerb_auth to see what happens. Thanks >>>> for the hint! >>>> >>>> On Thu, Oct 31, 2013 at 12:53 AM, Markus Moeller >>>> <huaraz@xxxxxxxxxxxxxxxx> wrote: >>>>> >>>>> >>>>> >>>>> Hi Mihail, >>>>> >>>>> Did you use export KRB5_KTNAME to point to the right keytab ? Is the >>>>> keytab readable by the user under which squid runs ? >>>>> >>>>> Markus >>>>> >>>>> "Mihail Lukin" wrote in message >>>>> >>>>> >>>>> >>>>> news:CAAmm_rZ8jNoeFMRGthiYeHQ+GgSfmySFnw8708dwdDVUW3=R_g@xxxxxxxxxxxxxx... >>>>> >>>>> Hello, >>>>> >>>>> I'm trying to configure Squid 3.1 to authenticate through AD with W2K8 >>>>> DC with Kerberos. I used this how-to: >>>>> http://wiki.squid-cache.org/ConfigExamples/Authenticate/Kerberos on >>>>> CentOS 6 box that I've joined to domain with `net ads join`. >>>>> >>>>> Now I'm getting the error in cache.log when I'm trying to visit any >>>>> URL through this proxy: >>>>> >>>>> 2013/10/30 17:07:41| squid_kerb_auth: DEBUG: Got 'YR base64 encoded >>>>> data' from squid (length: 2295). >>>>> 2013/10/30 17:07:41| squid_kerb_auth: DEBUG: Decode 'base64 encoded >>>>> data' (decoded length: 1717). >>>>> 2013/10/30 17:07:41| squid_kerb_auth: ERROR: gss_acquire_cred() >>>>> failed: Unspecified GSS failure. Minor code may provide more >>>>> information. >>>>> 2013/10/30 17:07:41| authenticateNegotiateHandleReply: Error >>>>> validating user via Negotiate. Error returned 'BH gss_acquire_cred() >>>>> failed: Unspecified GSS failure. Minor code may provide more >>>>> information. ' >>>>> >>>>> I could not figure out what the "minor code" is... I googled a lot with >>>>> no >>>>> luck. >>>>> Any help is very appreciated. Thanks in advance! >>>>> >>>> >>>> >>>> >>>> -- >>>> С уважением, >>>> Михаил Лукин >>> >>> >>> >>> >>> >>> >>> -- >>> С уважением, >>> Михаил Лукин >>> >> >> > >
