tcpTrigger

tcpTrigger is an open-source application that can notify you of incoming network connections and help you ward off several types of attacks. It monitors one or more ports and can display desktop alerts or send email notifications whenever a connection is detected, as well as launch an external application or script.

tcpTrigger can scan a series of TCP ports continuously, and you can set up several actions to be triggered when a connection is attempted. Aside from displaying simple pop-up notifications, the program can also send email alerts, and the message text is customizable.

Moreover, it is possible to have the application launch an external application when a connection is detected, as well as launch a script.

In order to steal sensitive data from your servers, intruders first need to map out all live hosts and running services using a port scanner. tcpTrigger can alert you of incoming ICMP echo requests or connections to any port.

Name resolution poisoning is a dangerous network attack that can cause usernames and passwords to be lost, and this application should be able to prevent them. Essentially, it broadcasts NetBIOS and LLMNR name queries for fictitious names, and an alert is triggered if a response is given.

The application’s user interface features a very straightforward layout, so much so that even inexperienced users should not run into any issues while setting things up. If you need any help, however, you should definitely consult the documentation available on the product’s GitHub page.

On the whole, tcpTrigger is a well-designed program that can help you monitor TCP ports for incoming connections, as well as prevent several types of network attacks. It is very user-friendly, and it provides you with comprehensive documentation.