[squid-users] Re: problems with kerberos authentication

Can you run squid_kerb_auth with -d and send me the output please ?

Markus

"Jose Lopes" <jlopes_at_iportalmais.pt> wrote in message
news:4B545789.1090706_at_iportalmais.pt...
> Hi,
>
> I'm trying to get the squid helper squid_kerb_auth to work against our
> Active Directory (win 2003 r2).
>
> I'm using squid 3.0.STABLE14
>
> Squid Cache: Version 3.0.STABLE14
> configure options: '--build=x86_64-mandriva-linux-gnu' '--prefix=/usr'
> '--exec-prefix=/usr' '--bindir=/usr/sbin' '--sbindir=/usr/sbin'
> '--sysconfdir=/etc/squid' '--datadir=/usr/share'
> '--includedir=/usr/include' '--libdir=/usr/lib64'
> '--libexecdir=/usr/lib64/squid' '--localstatedir=/var'
> '--sharedstatedir=/usr/com' '--mandir=/usr/share/man'
> '--infodir=/usr/share/info' '--x-includes=/usr/include'
> '--x-libraries=/usr/lib64' '--enable-shared=yes' '--enable-static=no'
> '--enable-xmalloc-statistics' '--enable-carp' '--enable-async-io'
> '--enable-storeio=aufs,diskd,null,ufs'
> '--enable-disk-io=AIO,Blocking,DiskDaemon,DiskThreads'
> '--enable-removal-policies=heap,lru' '--enable-icmp'
> '--enable-delay-pools' '--disable-esi' '--enable-icap-client'
> '--enable-useragent-log' '--enable-referer-log' '--enable-wccp'
> '--enable-wccpv2' '--disable-kill-parent-hack' '--enable-snmp'
> '--enable-cachemgr-hostname=localhost' '--enable-arp-acl'
> '--enable-htcp' '--enable-ssl' '--enable-forw-via-db'
> '--enable-cache-digests' '--disable-poll' '--enable-epoll'
> '--enable-linux-netfilter' '--disable-ident-lookups'
> '--enable-default-hostsfile=/etc/hosts'
> '--enable-auth=basic,digest,negotiate,ntlm'
> '--enable-basic-auth-helpers=getpwnam,LDAP,MSNT,multi-domain-NTLM,NCSA,PAM,SMB,YP,SASL,POP3,DB,squid_radius_auth'
> '--enable-ntlm-auth-helpers=fakeauth,no_check,SMB'
> '--enable-negotiate-auth-helpers=squid_kerb_auth'
> '--enable-digest-auth-helpers=password,ldap,eDirectory'
> '--enable-external-acl-helpers=ip_user,ldap_group,session,unix_group,wbinfo_group'
> '--with-default-user=squid' '--with-pthreads' '--with-dl'
> '--with-openssl=/usr' '--with-large-files'
> '--with-build-environment=default' '--with-filedescriptors=1024'
> 'build_alias=x86_64-mandriva-linux-gnu' 'CFLAGS=-O2 -g -pipe -Wformat
> -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
> -fstack-protector --param=ssp-buffer-size=4 -fstack-protector-all
> -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64' 'LDFLAGS= -Wl,--as-needed
> -Wl,--no-undefined -Wl,-z,relro' 'CPPFLAGS=-I/usr/include/openssl '
> 'CXXFLAGS=-O2 -g -pipe -Wformat -Werror=format-security
> -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
> --param=ssp-buffer-size=4 -fstack-protector-all -D_LARGEFILE64_SOURCE
> -D_FILE_OFFSET_BITS=64'
>
>
>
> A keytab file was create on AD for squid
> (HTTP/fqdn_at_REALM)
>
> ktpass -princ HTTP/fqdn_at_REALM -mapuser squiduser
> -pass password -ptype KRB5_NT_SRV_HST -out HTTP.keytab
>
> Transferred the file to the squid server and placed it
> in /etc/squid/HTTP.keytab
>
>
> kinit -k -t /etc/squid/HTTP.keytab HTTP/fqdn_at_REALM
> it works!
>
>
> At /etc/init.d/squid, I have included:
> KRB5_KTNAME=/etc/squid/HTTP.keytab
> export KRB5_KTNAME
>
> I have configured /etc/squid/squid.conf to use squid_kerb_auth
>
> I am using IE as client and set the proxy to fqdn.
>
> When i try to go to http://www.squid-cache.org/, IE asks for login and
> password, but it fails.
> The messages between squid an IE are:
>
> IE -> SQUID
> GET http://www.squid-cache.org/ HTTP/1.1
> [...]
>
> SQUID -> IE
> HTTP/1.0 407 Proxy Authentication Required
> Server: squid/3.0.STABLE14
> [...]
> Proxy-Authenticate: Negotiate
> [...]
>
> IE -> SQUID
> GET http://www.squid-cache.org/ HTTP/1.1
> [...]
> Proxy-Authorization: Negotiate
> TlRMTVNTUAABAAAAB4IIogAAAAAAAAAAAAAAAAAAAAAFASgKAAAADw==
>
> SQUID -> IE
> HTTP/1.0 407 Proxy Authentication Required
> Server: squid/3.0.STABLE14
> [...]
> Proxy-Authenticate: Negotiate
> [...]
>
> Seems like IE tries to authenticate with NTLM, and not with kerberos.
>
> How do I sort out this problem?
>
>
> Thanks in advance.
> Regards
> Jose Lopes
>
>
>
>
Received on Mon Jan 18 2010 - 23:05:05 MST