OrcaHub is a professional server stress testing service.
https://www.youtube.com/embed/IwpOfEkLB0oOrcaHub allows you to test the network security of your websites/servers with ease straight through your web browser. There is absolutely zero account data and everything is completely anonymous.
Layer 4 = A flood that hits the layer 4 with a very high bit rate. This is good for testing the network security of your home connection, a game server, or teamspeak server for example.
Layer 7 = This is a layer 7 attack that uses XML-RPC pingback to make tons of requests to your website simulating extremely high usage and overloading your server if it does not have the proper protection.
This server is completely free to use in 300 second increments, although you can purchase long boot time if you need to test for longer durations.
Here is the link to the website:
http://orcahub.comPlease let me know if you have any questions or concerns.