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CloseTheDoor 0.2.1

Identify the listening TCP/ UDP ports on your PC - and the programs behind them

by Mike Williams

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License: Open Source
Operating Systems: Windows 7 (32 bit), Windows 7 (64 bit), Windows Server, Windows Vista (32 bit), Windows Vista (64 bit), Windows XP
Requirements:

 

Languages: English
Software Cost: Free
Date Updated: 03 January 2012
Watchlist: Add download to my watchlist
Downloads To Date: 1743
Developer: Mathieu Bertin
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CloseTheDoor 0.2.1
Identify the listening TCP/ UDP ports on your PC - and the programs behind them

CloseTheDoor is a portable security tool which lists all the listening TCP/ UDP ports (to something other than a loopback address) over IPv4/ v6, and shows you their associated program files.

Which, if that's all just jargon to you, means you'll get to see all the programs and Windows services which are waiting for some kind of network or internet connection. This can help you to improve your system security, by identifying and closing listening processes which you don't need (fewer open ports means less chance of you being successfully attacked). You may also spot malware in the shape of some suspicious program which shows up on the list. And it can be interesting just as a way to better understand what's happening on your own PC, the processes you're running and the use they make of your network.

You've probably seen similar programs before - but CloseTheDoor is different. First, because it displays a great of information about each endpoint: the network interface and listening port, the protocol, the service behind it and it's process ID, any associated services, and data relating to the executable file (Company, Product, Description).

If you're not sure how a particular connection is being used, then right-clicking will offer you a great deal of research assistance. So you can open browser windows with common Google searches to find out what a port does, and how to close it; there are similar options for Wikipedia; you can jump directly to GRC.com's port database for more advice; and there's even a link to Sans.org's usage statistics (so you can see if a previously unknown port has suddenly been used a lot in the past few days, a strong indication of malware).

If you decide that a connection isn't essential, then CloseTheDoor can help you deal with that, too. Right-clicking provides an option to terminate the parent process, for instance. Or, if the connection is managed by a service, then the program can stop, disable or even uninstall it in a couple of clicks.

And all this comes in a compact, portable executable (its entire drive footprint is under 500KB), so it's the ideal tool to investigate network security on your own PC and any others you might visit.

Verdict:

There are plenty of tools around to display details on your open network connections and listening ports, but CloseTheDoor delivers more, particularly with its right-click research links, which will quickly help you understand what's happening on any PC.

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Spotlight: Free Full Software

WhatsApp Messenger 2.18.71

Free Full Commercial Software

WhatsApp Messenger is the world's most popular instant messaging app for smartphones.

You can use it to send and receive text and voice messages, photos, videos, even call your friends in other countries, and because it uses your phone's internet connection it might not cost you anything at all (depending on whether you'll pay data charges).

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There's plenty more (location sharing, contact exchange, message broadcasting) and the app is free for a year, currently $0.99/ year afterwards.

What's New in Version 2.18.71

- Group admins can now choose to allow only admins to send messages to a group. Open "Group Info" > tap "Group Settings". Non-admins will still be able to read messages and respond privately by tapping "Message Admin".
- You can now easily notify people when you change your phone number. Tap "Settings" > "Account" > "Change Number". You can select which contacts or chats you would like to notify.

[...]
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