[RHEL] Why I got messages "TCP_DENIED/407" into Squid logs when using "ntlm_auth" as authentication method ?

Solution Verified - Updated -

Issue

  • After install Squid and configure its authentication method to use "ntlm_auth", a lot of entries "TCP_DENIED/407" were found into Squid log files, but all Active Directory authentications were made without errors.
  • This configuration intends to make a single-sign-on available for Squid users.

  • A lot of lines as below can be found into /var/log/squid/access.log:

    268234226.935     0 172.16.0.38 TCP_DENIED/407 2117 CONNECT www.redhat.com:443 - NONE/- text/html

Environment

  • Red Hat Enterprise Linux all versions

  • Squid cache proxy using ntlm_auth to authenticate in Microsoft Active Directory

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content