[squid-users] Adobe CC behing Squid

Eliezer Croitoru eliezer at ngtech.co.il
Wed Jun 27 22:23:51 UTC 2018

Hey Amos,

Today in many environments there is a very wide usage of ON-LINE 
"libraries" since...
the server or a cache node is just "2 meters" from the developer.
(Picture the nearby Internet BOX being pointed as "This is the 
For me a 1MB file is still seems like too much for an Android APP in 
many case but
the world is changing and a kernel of more then 1MB is embedded in 
everyday devices around the globe.
I used to have huge disks for 80MB but today the in the same disk size 
you can store TB's of data(20+++).
I am sure that it's a global issue but the demand for traffic and 
on-line content is rising.

Just 10 years ago I had to have a huge wall filled with books to do 
little research but today I have a local DB
which contains literally rooms filled with books and is searchable.

I believe that the admin should understand a bit http\https to allow all 
The next step is Google ROOT CA but... SSL-BUMP bumped everybody so not 
only Google and FaceBook have their own ROOT CA.

This thread proves that there are out-there admins that think and ask 
which makes me be happy.
It means that stupidity has not spread to some places like this list.


On 2018-06-27 22:56, Amos Jeffries wrote:
> On 28/06/18 07:06, Verwaiser wrote:
>> Hello,
>> what would be the right way to implement the authentification bypass 
>> list
>> linked from adobe:
>> https://helpx.adobe.com/content/dam/help/attachments/Creative_Cloud_for_enterprise_Service_Endpoints.pdf
> Ouch. Rather a lot of domain names and explicitly states that it is
> incomplete.
> Some of them are *extremely* popular (eg Twitter, Google Maps, Google
> Play Store). WTF why does ACC need Google Maps access?
> Maybe looking for a User-Agent header string matching the tools that
> break will narrow it down to not allowing just anyone access to all
> those services.
>> I can write the list into a file, ok, but how can I setup the acl for
>> correct bypassig all the adresses from this list?
>> Is the "allways_direct" acl right?
> No. 'always_direct allow' means "dont use any cache_peer for this 
> request".
> There is no "bypass" directive. Every directive that you have 
> configured
> a need for auth to happen needs adjusting such that it also works
> without that auth requirement when your new ACL(s) match the 
> transaction.
>> Should I place it before the LDAP
>> authentication part in squid.conf?
> Yes. For every directive which currently requires an auth related test,
> place a test which matches the 'bypass' ACL first, OR make it so that
> you don't have to require the auth details at that point.
>  NP: The latest Squid versions note ACL type which can be useful here 
> to
> test username (the note named 'user' contains the username) without
> requiring that it exists nor triggering auth.
> The 'best practice' design is to configure http_access with an ordered
> structure like so:
>  # The default / recommended security checks at the top
>  # ending at that default line "INSERT YOUR CUSTOM RULES BELOW HERE."
>  # custom allow/deny rules that do not need auth
>  # authenticate
>  http_access deny !login
>  # custom allow/deny rules that need auth credentials
>  # and finally ...
>  http_access deny all
> The rest of your settings can assume that auth has taken place already
> (*if* necessary) and not re-test it themselves.
>> Is there more to work on?
> Everything which uses an authentication, username, or group ACL test
> needs looking at to see whether a bypass is needed.
> Amos
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Eliezer Croitoru
Linux System Administrator
Mobile: +972-5-28704261
Email: eliezer at ngtech.co.il

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