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<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=3 face=Arial><span style='font-size:12.0pt;font-family:Arial'>Network
Customer Update - </span></font><st1:date Month="8" Day="29" Year="2003"><font
face=Arial><span style='font-family:Arial'>August 29, 2003</span></font></st1:date><font
face=Arial><span style='font-family:Arial'><o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
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size=3 face=Arial><span style='font-size:12.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
size=3 face=Arial><span style='font-size:12.0pt;font-family:Arial'>ICMP Echo
Requests (</span></font><st1:place><font face=Arial><span style='font-family:
Arial'>Ping</span></font></st1:place><font face=Arial><span style='font-family:
Arial'>) Blocked </span></font><st1:date Month="8" Day="28" Year="2003"><font
face=Arial><span style='font-family:Arial'>August 28, 2003</span></font></st1:date><font
face=Arial><span style='font-family:Arial'>:<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-layout-grid-align:none;text-autospace:none'><font
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<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial'>In an ongoing effort to maintain network performance and
security, ITSD Network Services has determined that it is necessary to block
ICMP Echo requests (</span></font><st1:place><font face=Arial><span
style='font-family:Arial'>Ping</span></font></st1:place><font face=Arial><span
style='font-family:Arial'>) from our major perimeter points (Internet, K-12, <span
class=GramE>OPLIN</span>). We are seeing a growing number of customers whose
access links are being inundated with virus-related traffic, some over 50% of
their total utilization. This will not affect ICMP Echo requests (</span></font><st1:place><font
face=Arial><span style='font-family:Arial'>Ping</span></font></st1:place><font
face=Arial><span style='font-family:Arial'>) that originate from within the
State of </span></font><st1:State><st1:place><font face=Arial><span
style='font-family:Arial'>Ohio</span></font></st1:place></st1:State><font
face=Arial><span style='font-family:Arial'>'s network. This block will be
implemented without causing a disruption of service.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial;mso-no-proof:yes'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span style='font-size:12.0pt;
font-family:Arial;mso-no-proof:yes'>_____________________<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:PersonName><font size=3 face=Arial><span
style='font-size:12.0pt;font-family:Arial;mso-no-proof:yes'>Don Nuss</span></font></st1:PersonName><font
face=Arial><span style='font-family:Arial;mso-no-proof:yes'><br>
Technology Project Manager<br>
The </span></font><st1:State><st1:place><font face=Arial><span
style='font-family:Arial;mso-no-proof:yes'>Ohio</span></font></st1:place></st1:State><font
face=Arial><span style='font-family:Arial;mso-no-proof:yes'> Public Library
Information Network (OPLIN)<br>
<br>
Voice (614) 728-5252 FAX (614) 728-5256<br>
</span></font><st1:Street><st1:address><font face=Arial><span style='font-family:
Arial;mso-no-proof:yes'>1320 Arthur E. Adams Drive</span></font></st1:address></st1:Street><font
face=Arial><span style='font-family:Arial;mso-no-proof:yes'>, 1st Floor<br>
</span></font><st1:place><st1:City><font face=Arial><span style='font-family:
Arial;mso-no-proof:yes'>Columbus</span></font></st1:City><font face=Arial><span
style='font-family:Arial;mso-no-proof:yes'>, </span></font><st1:State><font
face=Arial><span style='font-family:Arial;mso-no-proof:yes'>OH</span></font></st1:State><font
face=Arial><span style='font-family:Arial;mso-no-proof:yes'> </span></font><st1:PostalCode><font
face=Arial><span style='font-family:Arial;mso-no-proof:yes'>43221</span></font></st1:PostalCode></st1:place><font
face=Arial><span style='font-family:Arial'><o:p></o:p></span></font></p>
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