Looking for an idea to develop a Networking Or Network Security Software

You could write an application that goes out searching the network/internet for innovative project ideas.

+10!

That's a completely different situation! :-) You should have mentioned the additional details because this way your post looks like that of many eager guys who wanna change the world without the required knowledge.

In this case you could probably get the best ideas from guys who have been using these tools on a daily basis. They probably have a lot of problematic tasks that could be automatized or simplified or maybe solved if a problem has no right solution. Another area where you could reinvent a lot of wheels is the mobile zone, many simple apps can reborn as a slick mobile version.

Network security: Creating a network security software never finishes. If you start writing one alone you will have to sacrifice your life on it. Lets check network security for example from the perspective of a windows client: It requires a firewall and a lot of "anti-hacks" that prevent downloaded malicious softwares to build themselves into the kernel and get out to the internet. It is probably a major pain in the ass to put together such software. On server side security is usually a good linux and networking software setup. What you can do on server side is maybe automatization of the network setup of a distro or finding/patching holes in the protocol of some networking software maybe creating a better alternative to some existing ones that are terrible at their roots... Software that detects holes.

Or simply get a job at a network security company if you can... There you could boost your knowledge easily!