Question about HTTP.SYS and SSL traffic

1) Why when using SSL over HTTP must we configure HTTP.SYS protocol listener to allow SSL trafic on particular port, but we are not required to configure NET.TCP listener when using SSL over TCP?

2) a) Is HTTP.SYS installed together with IIS, or does it exist independently of IIS?

b) If it is a part of IIS, then which HTTP listener is intercepting HTTP requests if IIS ( and thus HTTP.SYS ) is not installe开发者_高级运维d on the system?

Thank you

1. SSL over TCP still requires the TCP port to be open. You can do SSL traffic on port 12345; if you really wanted to. You just need the port open that is expecting inbound connections. I'm not 100% what is being asked here; can you elaborate?

2. HTTP.SYS is a driver; it is part of the Window's Operating System. Things other than IIS could use it.

HTTP.SYS exists for a few reasons:

1. Kernel level caching.
2. Logging.
3. QoS