[squid-users] Kerberos authentication only working with 1 domain server
Drikus Brits
drikus at geocastsp.co.za
Tue Apr 5 14:01:27 UTC 2016
Extra info :
root at mw-sqproxy-test:/home/geosupport# uname -a
Linux mw-sqproxy-test 3.19.0-25-generic #26~14.04.1-Ubuntu SMP Fri Jul
24 21:16:20 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
root at mw-sqproxy-test:/home/geosupport# squid3 -v
Squid Cache: Version 3.3.8
Ubuntu
configure options: '--build=x86_64-linux-gnu' '--prefix=/usr'
'--includedir=${prefix}/include' '--mandir=${prefix}/share/man'
'--infodir=${prefix}/share/info' '--sysconfdir=/etc'
'--localstatedir=/var' '--libexecdir=${prefix}/lib/squid3' '--srcdir=.'
'--disable-maintainer-mode' '--disable-dependency-tracking'
'--disable-silent-rules' '--datadir=/usr/share/squid3'
'--sysconfdir=/etc/squid3' '--mandir=/usr/share/man' '--enable-inline'
'--enable-async-io=8' '--enable-storeio=ufs,aufs,diskd,rock'
'--enable-removal-policies=lru,heap' '--enable-delay-pools'
'--enable-cache-digests' '--enable-underscores' '--enable-icap-client'
'--enable-follow-x-forwarded-for'
'--enable-auth-basic=DB,fake,getpwnam,LDAP,MSNT,MSNT-multi-domain,NCSA,NIS,PAM,POP3,RADIUS,SASL,SMB'
'--enable-auth-digest=file,LDAP'
'--enable-auth-negotiate=kerberos,wrapper'
'--enable-auth-ntlm=fake,smb_lm'
'--enable-external-acl-helpers=file_userip,kerberos_ldap_group,LDAP_group,session,SQL_session,unix_group,wbinfo_group'
'--enable-url-rewrite-helpers=fake' '--enable-eui' '--enable-esi'
'--enable-icmp' '--enable-zph-qos' '--enable-ecap'
'--disable-translation' '--with-swapdir=/var/spool/squid3'
'--with-logdir=/var/log/squid3' '--with-pidfile=/var/run/squid3.pid'
'--with-filedescriptors=65536' '--with-large-files'
'--with-default-user=proxy' '--enable-linux-netfilter'
'build_alias=x86_64-linux-gnu' 'CFLAGS=-g -O2 -fPIE -fstack-protector
--param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall'
'LDFLAGS=-Wl,-Bsymbolic-functions -fPIE -pie -Wl,-z,relro -Wl,-z,now'
'CPPFLAGS=-D_FORTIFY_SOURCE=2' 'CXXFLAGS=-g -O2 -fPIE -fstack-protector
--param=ssp-buffer-size=4 -Wformat -Werror=format-security'
root at mw-sqproxy-test:/home/geosupport#
Thanks,
Drikus
On 2016-04-05 15:50, Drikus Brits wrote:
> Hi Experts,
>
> After much struggling it seems i've reached some point of success but yet still not. I've checked a multitude of websites for help before coming here, but didn't get anything valuable yet. My problem as follows :
>
> I have 1x win2008R2 server that works with kerberos authentication, but none of the other PC's in the network wants to work, the others all come up with a login challenge/
>
> My Configs :
>
> /etc/krb5.conf
>
> <snip>
> #cat /etc/krb5.conf
> [logging]
>
> default = FILE:/var/log/krb5libs.log
> kdc = FILE:/var/log/krb5kdc.log
> admin_server = FILE:/var/log/kadmind.log [1]
>
> [libdefaults]
> default_realm = DOMAIN.CO.ZA
> dns_lookup_kdc = yes
> dns_lookup_realm = yes
> ticket_lifetime = 24h
> default_keytab_name = /etc/squid/PROXY.keytab
>
> #; 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
>
> [realms]
>
> DOMAIN.CO.ZA = {
> kdc = mw-ad.domain.co.za
> admin_server = mw-ad.domain.co.za
> default_domain = domain.co.za
> }
>
> [domain_realm]
>
> .domain.co.za = DOMAIN.CO.ZA
> domain.co.za = DOMAIN.CO.ZA
>
> [login]
> krb4_convert = true
> krb4_get_tickets = false
> </snip>
>
> my /etc/squid/squid.conf
>
> <snip>
> #auth_param negotiate program /usr/local/bin/negotiate_wrapper -d --ntlm /usr/bin/ntlm_auth --diagnostics --helper-protocol=gss-spnego --domain=DOMAIN --kerberos /usr/lib/squid3/negotiate_kerberos_auth -d -i ###WORKING - half/half
> auth_param negotiate program /usr/lib/squid3/negotiate_wrapper_auth -d --ntlm /usr/bin/ntlm_auth --diagnostics --helper-protocol=squid-2.5-ntlmssp --domain=DOMAIN.CO.ZA --kerberos /usr/lib/squid3/negotiate_kerberos_auth -d -s GSS_C_NO_NAME
> #auth_param negotiate program /usr/lib/squid3/negotiate_kerberos_auth -d -s GSS_C_NO_NAME
>
> auth_param ntlm program /usr/bin/ntlm_auth --diagnostics --helper-protocol=gss-spnego --domain=DOMAIN.CO.ZA
> auth_param ntlm children 10
> auth_param ntlm keep_alive off
>
> auth_param basic program /usr/lib/squid3/basic_ldap_auth -b "DC=domain,DC=co,DC=za" -f sAMAccountName=%s -D "CN=Folder Authentication,CN=Users,DC=domain,DC=co,DC=za" -w P at 55w0rd -H ldap://MW-AD.domain.co.za -R
> auth_param basic realm Web-Proxy
> auth_param basic credentialsttl 1 minute
>
> acl proxy-auth proxy_auth REQUIRED
>
> http_access allow proxy-auth
> </snip>
>
> When the Win2008R2 connectes is get the following in /var/log/squid3/cache.log
>
> <snip>
>
> 2016/04/05 12:26:46| negotiate_wrapper: Got 'YR YIIHDwYGKwYBBQUCoIIHAzCCBv+gMDAuBgkqhkiC9xIBAgIGCSq<truncated>DVzSeCUH4ntF1lHc=' from squid (length: 2419).
> 2016/04/05 12:26:46| negotiate_wrapper: Decode 'YIIHDwYGKwYBBQUCoIIHAzCCBv+gMDAuBg<truncated>UnIKhxWxh52aDVzSeCUH4ntF1lHc=' (decoded length: 1811).
> 2016/04/05 12:26:46| negotiate_wrapper: received Kerberos token
> negotiate_kerberos_auth.cc(315): pid=8218 :2016/04/05 12:26:46| negotiate_kerberos_auth: DEBUG: Got 'YR YIIHDwYGKwYBBQUCoIIHAzCCBv+gMDAuB<truncated>JDp51PN7RjUnIKhxWxh52aDVzSeCUH4ntF1lHc=' from squid (length: 2419).
> negotiate_kerberos_auth.cc(378): pid=8218 :2016/04/05 12:26:46| negotiate_kerberos_auth: DEBUG: Decode 'YIIHDwYGKwYBBQUCoIIHAzCCBv+gMDAuBgkqhkiC9xI<truncated>51PN7RjUnIKhxWxh52aDVzSeCUH4ntF1lHc=' (decoded length: 1811).
> 2016/04/05 12:26:46| negotiate_wrapper: Return 'AF oYG2MIGzoAMKAQChCwYJ<truncated>ZuxzWyWJhUSZttUH70Vw595AsuKtUWvtGjGC7vGmD5Ugufw= Administrator at DOMAIN.CO.ZA
>
> </snip>
>
> But when other PC's connect of which another win2008R2 or win10 or win7 i get :
>
> <snip>
>
> negotiate_kerberos_auth.cc(315): pid=9389 :2016/04/05 12:33:47| negotiate_kerberos_auth: DEBUG: Got 'YR YIIHDwYGKwYBBQUCoII<truncated>+BnGBajMprtChSPMuUX9nnZfT+cJk=' from squid (length: 2419).
> negotiate_kerberos_auth.cc(378): pid=9389 :2016/04/05 12:33:47| negotiate_kerberos_auth: DEBUG: Decode 'YIIHDwYGKwYBBQUCoIIHAzCCBv<truncated>MprtChSPMuUX9nnZfT+cJk=' (decoded length: 1811).
> negotiate_kerberos_auth.cc(200): pid=9389 :2016/04/05 12:33:47| negotiate_kerberos_auth: ERROR: gss_accept_sec_context() failed: Unspecified GSS failure. Minor code may provide more information.
> 2016/04/05 12:33:47| ERROR: Negotiate Authentication validating user. Error returned 'BH gss_accept_sec_context() failed: Unspecified GSS failure. Minor code may provide more information. '
>
> </snip>
>
> My kinit -V -kt /etc/squid3/PROXY.keytab , of which i'm sure if not supposed to say that :). I've had others that had Successfully authenticated to Kerberos V5 as well, but then the working win2008r2 doesn't work -- see below..
>
> <snip>
>
> # kinit -V -kt /etc/squid3/PROXY.keytab
> Using default cache: /tmp/krb5cc_0
> Using principal: host/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA
> Using keytab: /etc/squid3/PROXY.keytab
> kinit: Preauthentication failed while getting initial credentials
>
> </snip>
>
> working with "authenticated with kerberos but no srv or pc working
>
> <snip>
>
> msktutil -c -b "CN=COMPUTERS" -s HTTP/mw-sqproxy-test -s HTTP/mw-sqproxy-test.domain.co.za -h mw-sqproxy-test.domain.co.za -k /etc/squid3/PROXY.keytab --computer-name MWSQPROXYTEST --upn HOST/mw-sqproxy-test.domain.co.za --server mw-ad.domain.co.za --verbose --enctypes 28
>
> </snip>
>
> my working klist entries
>
> <snip>
>
> klist -ekt /etc/squid3/PROXY.keytab
>
> Keytab name: FILE:/etc/squid3/PROXY.keytab
> KVNO Timestamp Principal
> ---- ------------------- ------------------------------------------------------
> 2 04/04/2016 11:43:43 MW-SQPROXY-TEST$@DOMAIN.CO.ZA (arcfour-hmac)
> 2 04/04/2016 11:43:43 MW-SQPROXY-TEST$@DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 2 04/04/2016 11:43:43 MW-SQPROXY-TEST$@DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 2 05/04/2016 09:50:05 HTTP/mw-sqproxy-test at DOMAIN.CO.ZA (arcfour-hmac)
> 2 05/04/2016 09:50:05 HTTP/mw-sqproxy-test at DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 2 05/04/2016 09:50:05 HTTP/mw-sqproxy-test at DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 2 05/04/2016 09:43:05 HOST/mw-sqproxy-test at DOMAIN.CO.ZA (arcfour-hmac)
> 2 05/04/2016 09:43:05 HOST/mw-sqproxy-test at DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 2 05/04/2016 09:43:05 HOST/mw-sqproxy-test at DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 2 05/04/2016 09:43:06 HOST/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA (arcfour-hmac)
> 2 05/04/2016 09:43:06 HOST/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 2 05/04/2016 09:43:06 HOST/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 2 05/04/2016 09:50:06 host/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA (arcfour-hmac)
> 2 05/04/2016 09:50:06 host/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 2 05/04/2016 09:50:06 host/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 2 05/04/2016 09:50:05 MWSQPROXYTEST$@DOMAIN.CO.ZA (arcfour-hmac)
> 2 05/04/2016 09:50:05 MWSQPROXYTEST$@DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 2 05/04/2016 09:50:05 MWSQPROXYTEST$@DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 3 05/04/2016 10:15:33 MWSQPROXYTEST$@DOMAIN.CO.ZA (arcfour-hmac)
> 3 05/04/2016 10:15:33 MWSQPROXYTEST$@DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 3 05/04/2016 10:15:33 MWSQPROXYTEST$@DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 3 05/04/2016 10:15:33 host/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA (arcfour-hmac)
> 3 05/04/2016 10:15:33 host/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 3 05/04/2016 10:15:33 host/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 4 04/04/2016 16:29:08 host/mw-sqproxy-test at DOMAIN.CO.ZA (arcfour-hmac)
> 4 04/04/2016 16:29:09 host/mw-sqproxy-test at DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 4 04/04/2016 16:29:09 host/mw-sqproxy-test at DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 3 05/04/2016 10:15:33 HTTP/mw-sqproxy-test at DOMAIN.CO.ZA (arcfour-hmac)
> 3 05/04/2016 10:15:33 HTTP/mw-sqproxy-test at DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 3 05/04/2016 10:15:33 HTTP/mw-sqproxy-test at DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 3 05/04/2016 10:15:33 HTTP/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA (arcfour-hmac)
> 3 05/04/2016 10:15:33 HTTP/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 3 05/04/2016 10:15:33 HTTP/mw-sqproxy-test.domain.co.za at DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 5 04/04/2016 19:19:28 host/mw-sqproxy-test at DOMAIN.CO.ZA (arcfour-hmac)
> 5 04/04/2016 19:19:28 host/mw-sqproxy-test at DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 5 04/04/2016 19:19:28 host/mw-sqproxy-test at DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 6 04/04/2016 19:22:47 host/mw-sqproxy-test at DOMAIN.CO.ZA (arcfour-hmac)
> 6 04/04/2016 19:22:47 host/mw-sqproxy-test at DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 6 04/04/2016 19:22:47 host/mw-sqproxy-test at DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
> 7 04/04/2016 20:40:09 host/mw-sqproxy-test at DOMAIN.CO.ZA (arcfour-hmac)
> 7 04/04/2016 20:40:09 host/mw-sqproxy-test at DOMAIN.CO.ZA (aes128-cts-hmac-sha1-96)
> 7 04/04/2016 20:40:09 host/mw-sqproxy-test at DOMAIN.CO.ZA (aes256-cts-hmac-sha1-96)
>
> </snip>
>
> I'm using the fqdn in IE to authenticate with kerberos, if i change it to IP it only tries NTLM, which i'm assuming is correct or not?
>
> I've investigated the PC's and all of them have properly joined the domain.
>
> I've checked and i'm getting kvno 3 values from a working win2008r2 as well as kvno 3 values from other pc's but yet, they have a popup asking auth details.
> --
>
> Drikus Brits
>
> _______________________________________________
> squid-users mailing list
> squid-users at lists.squid-cache.org
> http://lists.squid-cache.org/listinfo/squid-users [2]
Links:
------
[1] FILE:/var/log/kadmind.log
[2] http://lists.squid-cache.org/listinfo/squid-users
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