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TCP blocking utility and TCP viewer

TCP blocking utility and TCP viewer

Vote: (5 votes)

Program license: Free

Developer: E-systems

Version: 1.0.15

Works under: Windows

Vote:

Program license

(5 votes)

Free

Developer

Version

E-systems

1.0.15

Works under:

Windows

Emsa Port Blocker is designed to give users control over the network traffic coming in and out of their Windows-based computers. This tool is primarily focused on managing TCP connections, providing a straightforward means to secure a system by blocking unwanted TCP access.

Functional Overview

Emsa Port Blocker is not a full-fledged firewall but operates in a similar capacity to restrict access to TCP ports and IP addresses. Its main functionality is to prevent the establishment of TCP connections on specified ports, curbing unauthorized access and network threats. The application is versatile, as it can block both outgoing connections to remote ports and incoming traffic to local ports.

User Interface and Configuration

The user interface of Emsa Port Blocker is designed with simplicity in mind. Users can easily navigate through settings to configure which ports to block. By adding a port, such as the HTTP port '80' to the remote blocked ports list, all outgoing traffic destined for that port will be stopped, which in turn prevents applications, like web browsers, from accessing web pages.

Additionally, the program is ideal for securing network-related ports, such as TCP 135 or 139, that are often targets for malicious activity. Advanced users will appreciate the ability to tweak the settings to allow connections between local IP addresses or to block them entirely, depending on the security needs of the environment.

Monitoring Capabilities

Beyond its blocking features, Emsa Port Blocker offers monitoring tools that display active TCP connections on the machine. This is valuable for users to understand their system's network activity and recognize potentially unauthorized access attempts.

The application also includes a detection function for local IP addresses, which can be added to an 'allowed' list. This feature assists in maintaining strict control over the system’s network access permissions, ensuring that only trusted devices can communicate with the computer.

Performance

Emsa Port Blocker performs its tasks without imposing significant overhead on system resources. The lightweight nature of the application means that it can run in the background without hindering the performance of other programs or the system itself.

Use Case Scenarios

This software is particularly useful for small business owners, IT professionals, and security-conscious users who want to enhance their network security without the complexity or cost of a complete firewall system. It can also serve educational purposes, helping individuals learn more about network management and security practices.

Pros

  • Lightweight and easy to use interface
  • Ability to block both incoming and outgoing TCP connections
  • Active monitoring of current TCP connections
  • Can designate allowed IP addresses for granular control

Cons

  • Lacks the comprehensive features of a full firewall
  • The tool may be too basic for users with complex network requirements

Emsa Port Blocker is a no-nonsense tool aimed at those who need straightforward TCP access control. Although it’s not a replacement for enterprise-grade firewalls, it offers a level of simplicity and effectiveness that will meet the needs of users looking to safeguard their computers from unwanted network traffic.