Dear jumba92,
The echo requests can be a DOS attack(Denial Of Service), also called the "ping flood". To block it, you must launch your TM sec. suite, so>
>>> >> click on
>>> >> Start > Programs > Trend Micro PC-cillin > Trend Micro PC-cillin
>> Internet
>>> >> Security 2005( applicable to later versions too).
>>> >>
>>> >> 2.) Click on Network Security.
>>> >>
>>> >> 3.) Click on Personal Firewall. Make sure the Enable Personal
>>> >> Firewall
>>> >> checkbox is selected. Under Edit Profile, choose the currently
>>> >> selected
>>> >> profile on the list (marked by a green circle) and then click on
>>> >> Edit.
>>> >>
>>> >> 4.) Click on the Exception List tab.
>>> >>
>>> >> 5.) Click Add to start creating a new rule.
>>> >> a.) On the Description box type in ICMP
>>> >> b.) Leave Target as all applications
>>> >> c.) Connection, select INCOMING
>>> >> d.) Action, select DENY
>>> >> e.) With Protocol, select ICMP
>>> >> f.) With Ports, select ALL PORTS
>>> >> g.) IP Setting is ALL ADDRESSES
>>> >>
>>> >> 6.) Click OK at the bottom.
>>> >>
>>> >> 7.) On the Exception List, make sure that the new rule created is
>> listed
>>> > and
>>> >> the box before it has a checkmark. Click the OK button once you have
>>> >> verified that the new rule created is listed and checked.
>>> >>
>>> >> 8.) To save the settings click the Apply button below.
Source : http://www.tech-archive.net/Archive/.../msg12271.html
Best wishes.

PS: i have no clue as to the "security matching"! There is an option to drop the default TM firewall and install another 3rd party firewall!