AATools TCP/IP and UDP Security Port scanner  - analyzes hosts and all the different services started on them. Port Scanner accurately determines active services on the appropriate host using TCP/UDP port interrogations. AATools Port Scanner includes an internal database currently reporting on 4257 ports (officially assigned, unofficially used, or currently affected by network Trojan Horses). 

Whether you dial-up to your ISP or utilize a cable modem that is constantly switched on, it is essential to protect your computer against the "evil" hackers that flourish on the Internet. If your computer is indeed open to all those threats, then the first item on your agenda will be to find a secure firewall to protect your beloved computer. There are many varieties of firewalls. Some are better than others and you should be cautious in trusting clever advertising claiming  that certain cheap firewall will be able to completely protect your computer. Once you have decided on a firewall, be it hardware or a software solution, testing the security of that firewall is of utmost importance. AATools is just the testing utility needed to verify the integrity of your security and firewall functions. 

AATools TCP/IP and UDP Port Scanner finds holes before intruders attack

To secure an Internet-connected network, firewall is a necessary component in your arsenal of tools. However, firewall alone is no longer sufficient protection, because it is a static device that enforces a particular rule set. To spot potential problems before intruders exploit them from inside or outside your network, you can implement several security tools, such as port scanner, vulnerability test, network analyzers. AATools include powerful TCP Port Scanner and the best UDP Port Scanner as well as 10 different state-of-the-art tools for assessment optimizing, managing, and safeguarding of your networks and computer. AATools TCP/UDP Port Scanner should be a part of your security toolkit and you should employ it regularly.

Why Be Concerned With AATools security TCP/ UDP Port Scanner?

TCP and UDP use port numbers to identify higher-layer services. Systems administrators use port scanner to determine what TCP/UDP services are available on a server. A cardinal rule of server security is to disable any service that the system isn't using because any open TCP/UDP service offers intruders a possible entry into your system. Thus, you can use a port scanner to ensure that only the desired TCP/UDP services are running on your server. This information is rather critical for developing and/or verifying the security policies.

The AATools Port Scanner will return which TCP or UDP ports are listening. You should check these ports to see if they are running services that you have approved. If they are running services which are undocumented, or which you do not wish to run, we suggest you disable them. Many operating systems are shipped with a large number of services that are not required for normal operation. In some cases these services may contain known or unknown security problems. It is recommended that any services which are not required be disabled. 

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See also

1. Default ports used by some well known Trojan programs.
2. How To Specify The Task for Scan in AATools Port Scanner?
3. TCP and UDP port scanning examples
4. AATools TCP/UDP Port Scanner features