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Application-Level Firewalls: Smaller Net, Tighter Filter: Page 9 of 19

Maximum Sustained Connections

We a similar test bed similar to that of our connection-rate test, but we set a
delay on WebReflector of 60 seconds, which kept the connection active. We then
ramped up the connections until we could make no more. We set the maximum
connections to varying levels until we found the maximum number of connections.

Throughput

We used HTTP/1.1 with persistent connections and created a transaction where a
user asked for a 25-KB page with two subobjects of 25 KB each. Each transaction
then consisted of a 75-KB download. We varied the number of connections per
second to reach a desired bandwidth. We disabled caching on the firewalls that
supported it and configured each page to be expired.

Protection Testing