[squid-users] Pseudo proxy authentication (mapping of IP address to user name) in intercept mode.

[Rafael Akchurin]

Hello Amos,

Thanks for your responses.

What I do not understand completely - if we have intercept style of deployment, when browsers know nothing about the proxy - how basic (or any other type of authenticator) will work? I always thought browsers will discard proxy-auth responses just because they do not know if proxy is in-between.

May it be that only session helper is applicable in this case?

Best regards,
Rafael

-----Original Message-----
> *Problem*: admin needs to manage squid acls (and icap web filter
> settings) using security groups from Active Directory. For 
> non-technical reasons, setup of explicit proxy settings and thus 
> enforcing proxy authentication on Squid is not possible.
> 
> *Solution*:
> 
> 1.Deploy some agent on domain controller that would periodically 
> enumerate workstation IPs and get currently logged on users by WMI or 
> something like this. This is fine and already working in our project 
> at https://github.com/diladele/active-directory-inspector
> 
> 2.Let Squid somehow use the remote running inspector to match the IP 
> address to user names (and expose the user name to ICAP eventually). 
> May be anyone knows the type of helper/acl/annotation that needs to be 
> in running/configured on the Squid box?
> 

That kind of authorization is the purpose of the session and LDAP external ACL helpers. Though AFAIK neither of them uses the AD interface (YMMV if the Perl DB module can use AD as an SQL-like database).

You might be able to also be use the Basic auth LDAP helper from Squid-3.4+ as an external ACL helper. It will require some fiddling of the LDAP parameters and the ACL input format to make the external ACL input into the Basic-auth lookup.