RE: [squid-users] Kerberos TCP/DENIED 407

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_at_example.com -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_at_treenet.co.nz]
Sent: 08 March 2012 02:44 PM
To: squid-users_at_squid-cache.org
Subject: Re: [squid-users] 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
Received on Thu Mar 08 2012 - 13:23:23 MST