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<p class=3D"MsoNormal">Hey Squid users, <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Running into an issue I&#8217;m trying to figure out=
. <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">We have a few acl directives using &#8220;proxy_auth=
_regex &#8211;i&#8221; and when I have these active, it blocks any proxy co=
nnection with an HTTP 407 error, according to the logs.
<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Here&#8217;s an example: <o:p></o:p></p>
<p class=3D"MsoNormal"># block certain user IDs from using proxy server<o:p=
></o:p></p>
<p class=3D"MsoNormal">#acl block_user proxy_auth_regex -i &quot;/etc/squid=
/block_user&quot;<o:p></o:p></p>
<p class=3D"MsoNormal">#http_access deny block_user<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">What&#8217;s supposed to happen with this ACL, is th=
at any username we have on that list is to be blocked from internet access.=
 But it seems to be blocking known good usernames too. I&#8217;m not sure w=
here to go from here, we would like to use these
 ACL&#8217;s but for right now I have these rules commented out. <o:p></o:p=
></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">Here's a few other rules we have that have the same =
issue:<o:p></o:p></p>
<p class=3D"MsoNormal"># executable blocking<o:p></o:p></p>
<p class=3D"MsoNormal"># reference this list for extensions to block<o:p></=
o:p></p>
<p class=3D"MsoNormal">acl exec_files url_regex -i &quot;/etc/squid/exec_fi=
les&quot;<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"># ignore these usernames from being blocked<o:p></o:=
p></p>
<p class=3D"MsoNormal">#acl exec_users proxy_auth_regex -i &quot;/etc/squid=
/exec_users&quot;<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal"># combine the rules<o:p></o:p></p>
<p class=3D"MsoNormal">#http_access deny !bad_exception_urls !exec_users ex=
ec_files<o:p></o:p></p>
<p class=3D"MsoNormal">#deny_info ERR_BLOCK_TYPE exec_files<o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
<p class=3D"MsoNormal">From what you can see above, we have &#8220;acl exec=
_files url_regex -i /etc/squid/exec_files&quot; uncommented, but it&#8217;s=
 not active because the &#8220;http_access directive&#8221; had to be comme=
nted out because it includes the other statements that include
 &#8220;proxy_auth_regex &#8211;i&#8221; which block all internet access as=
 well. <o:p></o:p></p>
<p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p>
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