Authenticatenegotiatehandlereply error validating user via negotiate


12-Jul-2020 13:25

Hello, I'm trying to figure out a kerberos/AD authentication problem in squid. The client browser asks for a username and password (which I really need to fix before we go live) but it is actually proxying requests.If I point firefox at the proxy, it requests a username and password and works. I'm fairly sure its a kerberos problems and that Firefox is authenticating using ldap (because if I comment out the "auth_param basic program ... I'm yet to test it properly and see if the groups and restrictions work. COM dns_lookup_kdc = no dns_lookup_realm = no ticket_lifetime = 24h default_keytab_name = /etc/squid3/PROXY.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[realms] MYDOMAIN. Normal, CN=Users, DC=mydomain, DC=com))" \ -h mydc.mydomain.com# full internet accessexternal_acl_type internet_full %LOGIN /usr/lib/squid3/squid_ldap_group -R -K \ -b "dc=mydomain,dc=com" \ -D [email protected]\ -w "mypasswd" \ -f "(&(objectclass=person)(s AMAccount Name=%v)(memberof=cn=Squid. COMSquid Cache: Version 3.1.6configure options: '--build=x86_64-linux-gnu' '--prefix=/usr' '--includedir=$/include' '--mandir=$/share/man' '--infodir=$/share/info' '--sysconfdir=/etc' '--localstatedir=/var' '--libexecdir=$/lib/squid3' '--disable-maintainer-mode' '--disable-dependency-tracking' '--disable-silent-rules' '--srcdir=.' '--datadir=/usr/share/squid3' '--sysconfdir=/etc/squid3' '--mandir=/usr/share/man' '--with-cppunit-basedir=/usr' '--enable-inline' '--enable-async-io=8' '--enable-storeio=ufs,aufs,diskd' '--enable-removal-policies=lru,heap' '--enable-delay-pools' '--enable-cache-digests' '--enable-underscores' '--enable-icap-client' '--enable-follow-x-forwarded-for' '--enable-auth=basic,digest,ntlm,negotiate' '--enable-basic-auth-helpers=LDAP, MSNT, NCSA, PAM, SASL, SMB, YP, DB, POP3,getpwnam,squid_radius_auth,multi-domain-NTLM' '--enable-ntlm-auth-helpers=smb_lm,' '--enable-digest-auth-helpers=ldap,password' '--enable-negotiate-auth-helpers=squid_kerb_auth' '--enable-external-acl-helpers=ip_user,ldap_group,session,unix_group,wbinfo_group' '--enable-arp-acl' '--enable-esi' '--disable-translation' '--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 -g -Wall -O2' 'LDFLAGS=' 'CPPFLAGS=' 'CXXFLAGS=-g -O2 -g -Wall -O2' --with-squid=/tmp/buildd/squid3-3.1.6## /etc/default/squid3 Configuration settings for the Squid proxy server.## Max. You can increase this on a busy# cache to a maximum of (currently) 65536 filedescriptors. SQUID_MAXFD=1024KRB5_KTNAME=/etc/squid3/PROXY.keytabexport KRB5_KTNAME####### /etc/squid3/Configuration File ############## cache managercache_mgr [email protected]####### kerberos authenticationauth_param negotiate program /usr/lib/squid3/squid_kerb_auth -d -s HTTP/squidsrv.mydomain.comauth_param negotiate children 30auth_param negotiate keep_alive on###### provide access via ldap for clients not authenticated via kerberosauth_param basic program /usr/lib/squid3/squid_ldap_auth -R \ -b "dc=mydomain,dc=com" \ -D [email protected]\ -w "mypasswd" \ -f s AMAccount Name=%s \ -h mydc.mydomain.comauth_param basic children 10auth_param basic realm Internet Proxyauth_param basic credentialsttl 1 minute####### ldap authorizations# restricted internet access loggedexternal_acl_type internet_normal %LOGIN /usr/lib/squid3/squid_ldap_group -R -K \ -b "dc=mydomain,dc=com" \ -D [email protected]\ -w "mypasswd" \ -f "(&(objectclass=person)(s AMAccount Name=%v)(memberof=cn=Squid.ping com -c 4 && ping -c 4 Check you can reverse lookup the domain controller and the local proxysrv ip from the DNS Server.dig -x 192.168.1.2dig -x 192.168.1.1 Install msktutil an Active Directory keytab managerapt-get install msktutil Configure the proxy's kerberos computer account and service principle by running msktutil msktutil -c -b "CN=Computers" -s HTTP/com -k /etc/squid3/PROXY.keytab --computer-name PROXYSRV-HTTP --upn HTTP/com --server com --verbose Note: chown proxy.proxy /etc/squid3/PROXY.keytab Destroy the administrator credentials used to create the account.

authenticatenegotiatehandlereply error validating user via negotiate-39

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COM default = FILE:/var/log/krb5kdc = FILE:/var/log/krb5dns_lookup_kdc = no dns_lookup_realm = no ticket_lifetime = 24h default_keytab_name = /etc/squid3/PROXY.keytab default_tgs_enctypes = RC4-HMAC DES-CBC-MD5 DES-CBC-CRC default_tkt_enctypes = RC4-HMAC DES-CBC-MD5 DES-CBC-CRC preferred_enctypes = RC4-HMAC DES-CBC-MD5 DES-CBC-CRC[realms] XYZ.

Hi All, I am trying to setup squid with kerberos based auth on a windows domain with both 2008_R domain controllers (purpose is to provide a proxy that logs the useranme of the user accessing the internet but does not prompt for a username and password), but encounter the same error everytime: I cannot get past this error and have rebuilt the Centos many times fresh.



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