XerXes - The Most powerful dos tool

Xerxes can be used in launching a DOS attack. Unlike Most DDOS tools are capable of putting heavy loads on HTTP servers and bring them to their knees by exhausting its resources.

XerXes is a simple application layer denial of service (DoS) tool which is used to attack servers directly and can be launched from a single system. It does not rely on a botnet and all connections originate from a single source. Upon execution the tool launches a TCP connection flood to its target causing session table resource exhaustion, effectively crashing the server.

Xerxes – Kali Linux Tutorial

This tool was committed on GitHub by zanyarjamal, it is one of the simple and most powerful DOS tools. To clone the tool from GitHub.

git clone https://github.com/zanyarjamal/xerxes.git

Then navigate to the cloned folder.
cd xerxes

Next, You Should compile with GNU GCC compiler

gcc xerxes.c -o xerxes

To launch the attack
./xerxes target.com 80

XerXes is capable of taking down a web server without needing to generate a significant amount of traffic, allowing it to go unnoticed by network based defenses. 

One solution is to use a host based firewall or DoS mitigation tool which closes idle connections more rapidly or drops connections from sources which have exceeded a predefined number of connections. Some vendors refer to this as adaptive connection reaping or aggressive aging.

Stay Secure & Stay Legal.