It is important to know the security implication of any network service before enabling it in. For example, a telnet client running on another device on the network can easily establish a telnet session to a system where telnet service is enabled; it needs only the IP address of the system and the port or socket number of the network service running on the system. The rule of thumb for TCP and UDP ports is: Turn off any services or listeners that you do not need for your application to function. One way to check the list of ports running on your system is to go to one of the many web sites that can run a remote scan of your system and tell you how secure the system.
One way to check the list of ports running on your system is to go to one of the many web sites that can run a remote scan of your system and tell you how secure the system. You may also manually test if a port is open using command prompt interface in your PC. You may also check what are the processes running in your PC by using the Windows Task Manager.
There are many good software packages available to allow users to secure their system. One of these software packages is known as a firewall. Firewall can be used to deny various ports from the access by another device located at another network. Majority of the routers installed today have basic NAT firewall protection, use them as the first firewall protection for Internet connection.
The fewer services running in your system at boot time, the quicker the system will boot. Unnecessary services not only subject you to security risk. They also slow down the operation of your system. So stopping unnecessary services on your system is a highly recommended practice!
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