International Journal of Computer Applications
With the spreading of the internet and online procedures requesting a secure channel, it has become an inevitable requirement to provide the network security. It is very clear that firewalls are not enough to secure a network completely because the attacks committed from outside of the network are stopped whereas inside attacks are not. This is the situation where Intrusions Detection Systems (IDSs) are in charge. IDSs are used in order to stop attacks, recover from them with the minimum loss or analyze the security problems.