Thank you Amos, will upgrade to 3.1.19 auth_param negotiate program /usr/local/bin/negotiate_wrapper -d --ntlm /usr/bin/ntlm_auth --diagnostics --helper-protocol=squid-2.5-ntlmssp --domain=EXAMPLE --kerberos /usr/lib/squid3/squid_kerb_auth -d auth_param negotiate children 10 auth_param negotiate keep_alive off auth_param ntlm program /usr/bin/ntlm_auth --diagnostics --helper-protocol=squid-2.5-ntlmssp --domain=EXAMPLE auth_param ntlm children 10 auth_param ntlm keep_alive off auth_param basic program /usr/lib/squid3/squid_ldap_auth -R -b "dc=example,dc=local" -D squiduser@xxxxxxxxxxx -W /etc/squid3/ldappass.txt -f sAMAccountName=%s -h exch01.example.local auth_param basic children 10 auth_param basic realm Internet Proxy auth_param basic credentialsttl 1 minute acl password proxy_auth REQUIRED acl manager proto cache_object acl localhost src 127.0.0.1/32 acl to_localhost dst 127.0.0.0/8 0.0.0.0/32 acl localnet src 192.168.0.0/24 acl SSL_ports port 443 acl Safe_ports port 80 # http acl Safe_ports port 21 # ftp acl Safe_ports port 443 # https acl Safe_ports port 70 # gopher acl Safe_ports port 210 # wais acl Safe_ports port 1025-65535 # unregistered ports acl Safe_ports port 280 # http-mgmt acl Safe_ports port 488 # gss-http acl Safe_ports port 591 # filemaker acl Safe_ports port 777 # multiling http acl CONNECT method CONNECT http_access allow manager localhost http_access deny manager http_access deny !Safe_ports http_access deny CONNECT !SSL_ports http_access deny !password http_access allow password http_access allow localhost http_access deny all icp_access deny all htcp_access deny all http_port 3128 hierarchy_stoplist cgi-bin ? access_log /var/log/squid3/access.log squid refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern (cgi-bin|\?) 0 0% 0 refresh_pattern . 0 20% 4320 icp_port 3130 coredump_dir /var/spool/squid3 -----Original Message----- From: Amos Jeffries [mailto:squid3@xxxxxxxxxxxxx] Sent: 08 March 2012 02:44 PM To: squid-users@xxxxxxxxxxxxxxx Subject: Re: Kerberos TCP/DENIED 407 On 9/03/2012 1:07 a.m., JC Putter wrote: > Amos, > > Thank you for the reply. > > Sorry I meant 3.0 STABLE 19. Please at minimum upgrade to 3.0.STABLE26 then, if possible 3.1.19. There are a handful of major security vulnerabilities in between. > The Zimbra Desktop client connects via port 443 and I have the > standard ACL; > > http_access deny !Safe_ports > http_access deny !SSL_ports > > however when I change the ACL to (very insecure) > > http_access allow CONNECT (without the exception of !SSL_ports) the zimbra client connects... > > no too sure if my ACL is incorrect or if a need to add additional ports in the ACL however according to Zimbra 443 is the only one required. The ACL you list above is not the defaults. The correct default is: http_access deny CONNECT !SSL_ports SSL_Ports should only contain the HTTPS ports you permit requests to. > I ran wireshark trace I can confirm that the proxy offers all configured authentication schemes and the client responds with a Kerberos ticket. Okay. It would seem to be some other part of the configuration. If you want a proper analysis please post your whole config (without the comments and empty lines though). Amos
