Emsa Port Blocker Security Tool

Key Features

• Emsa Port Blocker is a TCP blocking utility.
• What it does, is blocking unwanted tcp access from/to your computer.It is not a firewall, but up to some extent it could be regarded as a similar tool.
• Its purpose is to prohibit TCP access on certain ports and ip addresses.
• IT can also be used as a TCP monitor because it shows TCP connections currently active on the machine.This program works two ways.
• It can be configured to block access to certain local ports, but it can alsoprohibit access to specified remote ports as well.
• For example, you may try adding the port \'80\' to remote blocked ports.
• You\'ll immediately notice that you have disabled your browser\'s capability from accessing the www.
• You can use this program to block unauthorized access to certain ports on your computer, for example network ports like TCP 135 or 139 and so on.
• You can also use the configuration to permit connections between local IP\'s, or block even those as desired.
• The program comes with a function allowing to detect local ip\'s and adding them to the \'allowed\' IP list.Functions:- When first started up, the program shows a list of TCP connections on your machine.If you don\'t see anything there, try opening browser and visit some site and you\'ll see them.- By unchecking the \'Show only connected\' checkbox the program will also show tcp connections in other states, like LISTENING and so on.- The left hand list is versatile and its meaning depends on the last button clicked - check the label aboveto see what the list is currently displaying.- To add items to a list, type into the textbox below and click on add.
• Make sure you enter valid data (valid ip addresses/ valid port numbers).To delete one item, select it in the list and click on \'Delete\'.- To view Allowed IP Addresses, click on the corresponding button.
• By default, here you will see your local IP address (127.0.0.1).
• You may want to add all your local IP addresses to the allowed list.This program is Freeware.

Technical Specifications

• **Publisher:** E-systems.ro
• **License:** Freeware
• **Operating System:** Windows 7, Windows 8, Windows 10, Windows 11
• **Last Updated:** October 15, 2025
• **Category:** Internet / Security