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http://www.macupdate.com/download/35914/tcpblock_v4.2.dmg
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TCPBlock is a lightweight and fast application firewall for OS X 10.6 or later developed by delantis.com. The OS X firewall protects you from connections that come from outside of your computer. But what about the software from your computer that opens new connections to the internet? With TCPBlock you can prevent selected applications on your computer from opening connections to the network.

TCPBlock is implemented as a loadable kernel module which contains all the blocking logic. You can configure it in the System Preferences TCPBlock preference pane or with the tcpblock command line utility. All the configuration more...

What's New

Version 4.2:
  • Solved an error related to connecting apps display.

Requirements

OS X 10.6 or later

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TCPBlock User Discussion

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Dedalus271 Member IconReview+20
Dedalus271
+1

What a great little gem! It works perfectly. And it's free and easy. Glad for my 10$ donation.

Reply0 replies
Version 4.2
Wickedsp1d3r Member IconComment+124
Wickedsp1d3r
+1

I recently installed TCPBlock in place of Little Snitch. I have been satisfied with the behavior of the application. It's lightweight, but very powerful at the same time. And the best of all: it's free, which is a huge advantage, because it does not remain in the shadow of Little Snitch or Hands Off!.

Ability to create temporary rules seems to be missing. I would like to be able to test some connection(s) and after that, allow/disallow them depending on the situation.

Reply0 replies
Version 4.2
Michiel Brand Member IconReview+1
Michiel Brand
+0

Used to be very good, but since Mavericks it keeps on crashing - whether I install the stable or experimental version, no difference. Keeps on asking for sending crash reports, which is a bit irritating, please fix asap, thx

Reply1 reply
Version 3.0
Delantis (Developer)
+3

Please send more details and especially crash log files to the contact email address on my website.

Kobalt Member IconReview+464
Kobalt
+2

Yes, I use LittleSnitch but feel much better for using TCPBlock at the same time. Excellent app.

Reply0 replies
Version 3.0
Kobalt Member IconReview+464
Kobalt
+0

Just a bit worried about the disclaimer on Jo's website: 'This is a beta version, things may not work as expected.', but I'll give it a go.

My star rating is for the stable v2.1 and may well increase once v3 is out of beta, because it seems to tick all the missing boxes.

Reply0 replies
Version 3.0b1
Afcgbbob Member IconComment+167
Afcgbbob
+1

For once I will be short (impossible). How is it you say Free but put in parenthesis $10? I find that rather confusing. You see I said I was short.

BTW does anyone know of any Mags looking for an Android reviewer? T-Mobile gave me a myTouch Q for free and like the Mac I work it and organize it like a Mac. I even found a way to multitask on it.

Thanks

Reply1 reply
Version 2.10
MacUpdate-Nick
+0

Sorry for the confusion; TCPBlock is donation-ware. We've updated the listing with a note to reflect this.

WesJT2006 Member IconReview+2
WesJT2006
+1

TCPBlock doesn't appear to fully work. I've been using it a couple of months and it seemed to be working fine at first. It would prevent applications from connecting to the internet unless I had them whitelisted, which is how I had it configured. But the other day I was using uTorrent to download several files (a total of 7 or 8 GB). The files completed downloading, but then I remembered that I never whitelisted uTorrent (or anything other the Google Chrome for that matter). To test this out I added a new torrent and it began downloading with no problems, but TCPBlock stated that it was blocking uTorrent from connecting. If TCPBlock tells me that the application is being blocked, yet the application is clearly sending and receiving large amounts data, then TCPBlock really can't be trusted. This really makes me wonder what other connections are being allowed without my knowledge.

Reply4 replies
Version 2.10
Mikael B
+0

Thanks for the warning. What OS X version? The behavior may be different in different versions.

WesJT2006
+1

10.6.8

Negritude
+0

What did the log say? Under "Connecting Apps", when you were running uTorrent, was uTorrent listed as being allowed to connect out? Was there anything else in the log that you didn't recognize?

The system name or the name of a subroutine that is used to connect out may be different than the name of the application itself. With TCPblock, you have to enter the EXACT name or it won't work.

Delantis (Developer)
+0

This is so due to a bug in v2.10 related to the filtering of UDP connections. Thanks to your comment I have solved the bug in the actual version 3.0b4. If you block a running uTorrent then the current download streams are not killed but it can not open new downloads. At the next start of uTorrent no downloads are possible anymore.

WaynesWorld Member IconComment+0
WaynesWorld
+0

Unable to get the White List functionality to work. Select "White List", then Add (+) app. Then "Select Application" and add "Safari" as a test. Close the dialog, start up Safari and won't connect to anything. Re-Open TCPBlock and either disable or uncheck "White List" and remove Safari and try to connect again using Safari and it works. It's a mystery as I can't seem to find reference to anyone else having this problem

Thanks

Reply0 replies
Version 2.10
zaydon Member IconReview+17
zaydon
+0

Great lightweight outbound firewall. It doesn't learn like some other products, but it works well if you instruct it with the apps you want to block.
The great thing is the value and the limited resources this application takes.
Its very simple with few options per se. If you go to the developers website you can learn how to setup blocking notifications in notification center in mountain lion.

Reply0 replies
Version 2.10
Anthony1947 Member IconComment+30
Anthony1947
+0

Not sure to make this a Comment or a Troubleshooting issue — but, I suspect that Troubleshooting issues get less attention.

I've had issues with FaceTime — flat out would NOT work. I tried every possible solution, finally got help from the Apple TechSupport folks. It turns out that TCPBlock was the culprit — I had to remove it to get FT functionality again.

I really counted on TCPBlock to act as my application firewall — too many apps 'phone home' or wherever for my liking.

I hope that something can be done to enable me to re-install TCPBlock so that I can have its protective functionality.

Many thanks to the developers for this excellent software.

Ciao.

Two 2011 iMac's— 10.7.4/10.7.5

Reply0 replies
Version 2.10
user icon+0
tien113
Version 4.2
user icon+0
-TiTAN-
Version 4.2
user icon+31
Tschigg
Version 4.2
user icon+0
-TiTAN-
Version 4.0b1
user icon+0
fawza
Version 3.0
user icon+38
BadBadger
Version 3.0
user icon+0
-TiTAN-
Version 3.0
user icon+0
dutkutug
Version 3.0b7
user icon+0
Voongoto
Version 2.10
user icon+0
MercuryNu
Version 2.8
> 5 22

Ratings

Overall
(22)
Current Version (4.x)
(5)

Details

Downloads 32,102
Version Downloads 2,671
License Free
Date 26 Apr 2014
Platform Intel 64 / OS X / Intel 32
Price Free
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