[squid-dev] effective acl for tcp_outgoing_address

[Eliezer Croitoru]

Hey,

As Alex gave you the technical details.

At runtime of squid there is a sequence of events and acls validation.
http_access is validated as a slow acl first long before tcp_outgoing_address is happening.
If you will apply a "dummy" rule in the http_access like what Alex has suggested
you would be able to make sure that when the tcp_outgoing_address validation happens
a "pre-cooked"(this is how I call it) or a pre-determined session note will be "sticked" to the session details.

This is a simplified:
https://github.com/elico/vagrant-squid-outgoing-addresses/blob/master/shared/squid.conf#L14

squid.conf which includes the usage of a note from a helper that will always match like "all" should always be true
(which is used in alex example).

Let me know if it still doesn't make sense.

Eliezer

----
Eliezer Croitoru
Tech Support
Mobile: +972-5-28704261
Email: ngtech1ltd at gmail.com
Zoom: Coming soon


-----Original Message-----
From: Hideyuki Kawai <h.kawai at ntt.com> 
Sent: Thursday, January 14, 2021 2:22 PM
To: Eliezer Croitoru <ngtech1ltd at gmail.com>
Cc: squid-dev at lists.squid-cache.org
Subject: RE: [squid-dev] effective acl for tcp_outgoing_address

Dear Eliezer

Thank you for your reply.
Could you let me ask you about your comment.

"slow acl" can use in tcp_outgoing_address?

Best regards,
Kawai

-------------------------------------
h.kawai at ntt.com
-------------------------------------
-----Original Message-----
From: Eliezer Croitoru <ngtech1ltd at gmail.com> 
Sent: Thursday, January 14, 2021 8:36 PM
To: Hideyuki Kawai（川井秀行） <h.kawai at ntt.com>
Cc: squid-dev at lists.squid-cache.org
Subject: RE: [squid-dev] effective acl for tcp_outgoing_address

It's more of an users question.

Just to clear it out, the tcp_outgoing_address is a fast acl just when the decision is "required"
You can "pre-cook" the value of a specific note when the connection is only at the first http_access level.
An example for a setup which does probably what you want based on htaccess passwords you can here:
https://github.com/elico/vagrant-squid-outgoing-addresses

It's a vagrant lab which demonstrate this.

Let me know if it helps you or you need clarification.

Eliezer
----
Eliezer Croitoru
Tech Support
Mobile: +972-5-28704261
Email: ngtech1ltd at gmail.com
Zoom: Coming soon


-----Original Message-----
From: squid-dev <squid-dev-bounces at lists.squid-cache.org> On Behalf Of Hideyuki Kawai
Sent: Thursday, January 14, 2021 2:48 AM
To: squid-dev at lists.squid-cache.org
Subject: [squid-dev] effective acl for tcp_outgoing_address

Hi, this is Kawai.

Please let me send inquiry as followings.

### Requirement ###
1. Kerberos auth with Active Directory	: auth_param ..... 	<- Success
2. "Security group" check which is gotten from AD : external_acl_type ...(using ext_kerberos_ldap_group_acl)   <- success
3. Different outgoing IP based on "Security group" : tcp_outgoing_address + external_acl  <- fail

### Inquiry ###
1. "external_acl" can not use on tcp_outgoing_address. Because the external_acl type is slow.
   My understanding is correct?
2. If yes, how to solve my requirement?

Please let me inform your comment and knowledge.
Thanks in advance.

-------------------------------------
h.kawai at ntt.com
-------------------------------------
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