Educause Security Discussion mailing list archives

Re: Web filtering

From: "Crim, David" <dvcrim () TAYLOR EDU>
Date: Wed, 27 May 2009 07:52:25 -0400

Just to toss in my 2 cents.

We had a barracuda 910 and saw the same problem, the device is rated to
300Mb/sec, we only have a 45Mb/sec connection.  I've been told the same
5,500 active connections by tech support.  Whilst debugging the issue, I
saw the box perform up to between 6500 and 7000 connections before
starting to crash.  Under our peak times, we clocked the box at over
13,000 connections, obviously well beyond the box, or even 2 boxes.
Your campus may vary, but we found that between 60% and 80% of the
active connections were related to facebook browsing. 

Since then we've switched to a pair of St. Bernard iPrism 100H's.  They
work well in-line with each other with 1 filtering ResNet, 1 filtering
the rest of the University.

David Crim
Security Analyst
Information Technology
236 West Reade Avenue
Upland, Indiana 46989-0001
Office: 765-998-5167     Cell: 765-251-3370
Fax: 765-998-4640


-----Original Message-----
From: The EDUCAUSE Security Constituent Group Listserv
[mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of Barros, Jacob
Sent: Tuesday, May 26, 2009 2:54 PM
To: SECURITY () LISTSERV EDUCAUSE EDU
Subject: Re: Web filtering

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50Mb uplink.  During peak times, we average around 30Mb inbound and
maybe 2Mb outbound. =20
=20
Just to be clear, the trouble with the Barracuda was not throughput but
in connections.  The 610 was limited to 1500.  The 910 expands to 5,500
but when tech support was trouble shooting our failures, they said we
were already approaching or above 5,500 during peak times.  My initial
concern was that there was invalid or malicious traffic slipping by us,
but they confirmed that connections were mostly http.  =20
=20
Jacob Barros
Network Administrator
Grace College
=20
From: The EDUCAUSE Security Constituent Group Listserv
[mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of Lopez, Diego
Sent: Tuesday, May 26, 2009 10:59 AM
To: SECURITY () LISTSERV EDUCAUSE EDU
Subject: Re: [SECURITY] Web filtering
=20
In order to keep things in perspective, what is your approximate
Internet traffic ?
=20
Diego Lopez
Network Analyst
Miami Dade College
=20
From: The EDUCAUSE Security Constituent Group Listserv
[mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of Barros, Jacob
Sent: Tuesday, May 26, 2009 10:27 AM
To: SECURITY () LISTSERV EDUCAUSE EDU
Subject: Re: [SECURITY] Web filtering
=20
We use iPrism by St Bernard.  We were happy with Barracuda until the box
began to have major failures, i.e. stopped all traffic.  Only a hard
reset would restore service.  We eventually had to leave them because
none of their appliances couldn't handle our 'normal' web traffic.  In
my opinion, their solution just doesn't fit higher ed anymore. =20
=20
iPrism has been a beautiful substitute.  Some of their categories aren't
quite what we hope for, but it's a breeze to customize.  In the 7 months
we have been using it there have only been one or two times that I can
remember a website being mis-categorized from a dynamic update.
=20
In a related note, we believe both boxes are equally capable of curbing
many malware infections.  When we were in between solutions, there was a
window of about six days were there was no appliance in place.  After
about three days we got flooded with machines being infected with all
sorts of goodies.  It all ended shortly after we installed the iPrism
for testing.
=20
FWIW
=20
Jacob Barros
Network Administrator
Grace College
=20
=20
From: The EDUCAUSE Security Constituent Group Listserv
[mailto:SECURITY () LISTSERV EDUCAUSE EDU] On Behalf Of Charles Seitz
Sent: Tuesday, May 19, 2009 3:59 PM
To: SECURITY () LISTSERV EDUCAUSE EDU
Subject: Re: [SECURITY] Web filtering
=20
We have been using a Barracuda web content filter for a while. I can't
say it's been 100% smooth. It died the other day and we had to replace
it, and sometimes it just does odd things that slow down web surfing to
a crawl. We only use it on the fac/staff network.=20
________________________________

Charles A. Seitz
Senior Security Analyst
University of Tennessee Information Security Office
Martin Campus
cseitz () tennessee edu
(731) 881-7966



On 5/19/09 2:22 PM, "Reyes, Esteban" <reyes () LAKEFOREST EDU> wrote:
Has anyone been able to implement web filtering with dynamic updates? If
so, what are you using to achieve that?

Thanks,

Esteban Reyes | Lake Forest College

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<body lang=3DEN-US link=3Dblue vlink=3Dpurple =
style=3D'tab-interval:.5in'>

<div class=3DSection1>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
mso-bidi-font-family:"Times New Roman";color:#1F497D'>50Mb uplink.<span
style=3D'mso-spacerun:yes'>&nbsp; </span>During peak times, we average =
around 30Mb
inbound and maybe 2Mb outbound.<span style=3D'mso-spacerun:yes'>&nbsp; =
</span><o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
mso-bidi-font-family:"Times New =
Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
mso-bidi-font-family:"Times New Roman";color:#1F497D'>Just to be clear,
=
the
trouble with the Barracuda was not throughput but in connections.<span
style=3D'mso-spacerun:yes'>&nbsp; </span>The 610 was limited to =
1500.<span
style=3D'mso-spacerun:yes'>&nbsp; </span>The 910 expands to 5,500 but =
when tech
support was trouble shooting our failures, they said we were already =
approaching
or above 5,500 during peak times.<span style=3D'mso-spacerun:yes'>&nbsp;
=
</span>My
initial concern was that there was invalid or malicious traffic slipping
=
by us,
but they confirmed that connections were mostly http. <span
style=3D'mso-spacerun:yes'>&nbsp;&nbsp;</span><o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
mso-bidi-font-family:"Times New =
Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<div>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:"Times =
New Roman";
color:#1F497D;mso-no-proof:yes'>Jacob Barros<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:"Times =
New Roman";
color:#1F497D;mso-no-proof:yes'>Network =
Administrator<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
mso-fareast-font-family:"Times New Roman";mso-bidi-font-family:"Times =
New Roman";
color:#1F497D;mso-no-proof:yes'>Grace College<o:p></o:p></span></p>

</div>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
mso-bidi-font-family:"Times New =
Roman";color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<div>

<div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt =
0in 0in 0in'>

<p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";
mso-fareast-font-family:"Times New Roman"'>From:</span></b><span
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-
f=
ont-family:
"Times New Roman"'> The EDUCAUSE Security Constituent Group Listserv
[mailto:SECURITY () LISTSERV EDUCAUSE EDU] <b>On Behalf Of </b>Lopez, =
Diego<br>
<b>Sent:</b> Tuesday, May 26, 2009 10:59 AM<br>
<b>To:</b> SECURITY () LISTSERV EDUCAUSE EDU<br>
<b>Subject:</b> Re: [SECURITY] Web filtering<o:p></o:p></span></p>

</div>

</div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>In order to keep things in perspective, what is your =
approximate
Internet traffic ?<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Diego Lopez<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Network Analyst<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Miami Dade College<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<div>

<div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt =
0in 0in 0in'>

<p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span

</b><span
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> The =
EDUCAUSE Security
Constituent Group Listserv [mailto:SECURITY () LISTSERV EDUCAUSE EDU] <b>On
=
Behalf
Of </b>Barros, Jacob<br>
<b>Sent:</b> Tuesday, May 26, 2009 10:27 AM<br>
<b>To:</b> SECURITY () LISTSERV EDUCAUSE EDU<br>
<b>Subject:</b> Re: [SECURITY] Web filtering<o:p></o:p></span></p>

</div>

</div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>We use iPrism by St Bernard.&nbsp; We were happy with =
Barracuda
until the box began to have major failures, i.e. stopped all =
traffic.&nbsp;
Only a hard reset would restore service.&nbsp; We eventually had to =
leave them
because none of their appliances couldn&#8217;t handle our =
&#8216;normal&#8217;
web traffic.&nbsp; In my opinion, their solution just doesn&#8217;t fit
=
higher
ed anymore.&nbsp; <o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>iPrism has been a beautiful substitute.&nbsp; Some of =
their
categories aren&#8217;t quite what we hope for, but it&#8217;s a breeze
=
to
customize.&nbsp; In the 7 months we have been using it there have only =
been one
or two times that I can remember a website being mis-categorized from a
=
dynamic
update.<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>In a related note, we believe both boxes are equally =
capable of
curbing many malware infections.&nbsp; When we were in between =
solutions, there
was a window of about six days were there was no appliance in =
place.&nbsp;
After about three days we got flooded with machines being infected with
=
all
sorts of goodies.&nbsp; It all ended shortly after we installed the =
iPrism for
testing.<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>FWIW<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Jacob Barros<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Network Administrator<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Grace College<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<div>

<div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt =
0in 0in 0in'>

<p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span

</b><span
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> The =
EDUCAUSE
Security Constituent Group Listserv =
[mailto:SECURITY () LISTSERV EDUCAUSE EDU] <b>On
Behalf Of </b>Charles Seitz<br>
<b>Sent:</b> Tuesday, May 19, 2009 3:59 PM<br>
<b>To:</b> SECURITY () LISTSERV EDUCAUSE EDU<br>
<b>Subject:</b> Re: [SECURITY] Web filtering<o:p></o:p></span></p>

</div>

</div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

<p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:11.0pt;
font-family:"Calibri","sans-serif"'>We have been using a Barracuda web =
content
filter for a while. I can&#8217;t say it&#8217;s been 100% smooth. It =
died the
other day and we had to replace it, and sometimes it just does odd =
things that
slow down web surfing to a crawl. We only use it on the fac/staff =
network. <o:p></o:p></span></p>

<div class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";mso-fareast
-=
font-family:
"Times New Roman"'>

<hr size=3D3 width=3D"95%" align=3Dcenter>

</span></div>

<p class=3DMsoNormal style=3D'margin-bottom:12.0pt'><span =
style=3D'font-size:11.0pt;
font-family:"Calibri","sans-serif"'>Charles A. Seitz<br>
<span style=3D'color:gray'>Senior Security Analyst<br>
</span><b><span style=3D'color:#FF8000'>University of Tennessee =
Information
Security Office<br>
</span><span style=3D'color:navy'>Martin Campus<br>
</span></b><a href=3D"cseitz () tennessee edu">cseitz () tennessee edu</a><br>
(731) 881-7966<br>
<br>
<br>
<br>
On 5/19/09 2:22 PM, &quot;Reyes, Esteban&quot; &lt;<a
href=3D"reyes () LAKEFOREST EDU">reyes () LAKEFOREST EDU</a>&gt; =
wrote:</span><o:p></o:p></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>Has
anyone been able to implement web filtering with dynamic updates? If so,
=
what
are you using to achieve that?<br>
<br>
Thanks,<br>
<br>
Esteban Reyes | Lake Forest College</span><o:p></o:p></p>

</div>

</body>

</html>

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Current thread:

Web filtering Reyes, Esteban (May 19)
- <Possible follow-ups>
- Re: Web filtering Charles Seitz (May 19)
- Re: Web filtering Di Fabio, Andrea (May 19)
- Re: Web filtering Russ Leathe (May 19)
- Re: Web filtering Justin Dover (May 19)
- Re: Web filtering Barros, Jacob (May 26)
- Re: Web filtering Lopez, Diego (May 26)
- Re: Web filtering Reyes, Esteban (May 26)
- Re: Web filtering Charlie Prothero (May 26)
- Re: Web filtering Barros, Jacob (May 26)
- Re: Web filtering Crim, David (May 27)