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TCP and UDP ports are common targets of resource exhaustion attacks. There are several DoS attacks that focus on exhausting the target's ability to create connections over a particular port. These attacks not only attempt to make these ports unusable but also raise the CPU to 100 percent usage by having to manage all the connection requests on the ports under siege.
Client OS: Available as C code (tested on Linux)
Target OS: TCP/IP networks
Description: Mutilate can be used with the following command:
#>./mutilate <target_IP> <port>
Mutilate can also perform a port scan by using the -s flag in place of a target port number. The port scan allows you to determine open ports against which to then run this DoS tool.
Client OS: Available as C code (tested on Linux)
Target OS: TCP/IP networks
Description: Pepsi5, a modification of the original Pepsi DoS tool, targets UDP ports with a specifiable number and size of datagrams. Pepsi5 can run in the background and can mask the process name under which it runs (through the stealth option).
You can counter this attack by blocking all unused ports at the firewall.
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