REB175P
USER’S GUIDE
97
Denial of Service
Denial of Service is only available in Firewall Range Extender
mode.
A Denial of Service attack is an attempt by a user (or users) to
make a server’s or network’s services unavailable. The user
sends a server multiple requests with false return addresses.
The server will attempt to respond by sending a request back to
the user; however, since the address is false, the server will wait
for a response before closing the connection. When multiple
requests like this occur, servers may often get overloaded with
too many requests and stop functioning altogether. This is a typical DoS attack, although DoS attacks may not
be limited to this type of attack.
The Firewall Range Extender can assist in preventing these types of attacks by scanning the network for
patterns of activity that represent DoS attacks. If a pattern comes in frequently, the Firewall Range Extender
can attempt to block messages containing that pattern and thus protect the server from becoming overloaded
and unresponsive.
