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Why wont my K9 web protection filter block certain sites? And can I create a whitelist on K9? [closed]

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I currently use the free K9 web protection filter as the (only) internet filter on my computer. My problem is that sometimes I will be able to access sites whose categories I have blocked and I don't understand why? Can someone help me, I have heard that this has to do with something called secure requests but I havent quite got it yet.

Secondly is it possible to create a whitelist on K9, maybe that will solve the problem. However I cannot find a whitelist option.

Thanks in advance!


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1   Excellent question. People are paying technicians fortunes for this kind of information!!! - gadol hadorJul 03  '12 at 22:15
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    Newsgaadi keeps you updated on news in automobile industry, covering everything from two wheelers to four wheelers, smart phones, laptops, tabs, new launches and their reviews. - suryaFeb 18  '14 at 15:56
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3 answers!

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You've touched on one of the more complicated parts of Internet filters. Let me explain to you what is happening. Actually because this is going to be a pretty long post, let me just first give it in short for those who cant be bothered going through the whole thing.

You are accessing webpages with a protocol that begins with https:// instead of http. This sends the page in code and the filter cannot intercept it. Some sites will force you to use their secure code so it isn't your choice. To stop this from happening, go to Advanced Settings and choose 'filter secure traffic'. As to your second question if you choose a custom setting and block everything, then you can specify in the exceptions page the pages that you allow. If you want many more tips, read on.

There are two types of filters. The first is a filter that stops certain pages being available from the internet. The second and this is the method of K9 is to put a filter on the computer, that when an internet page is received and it doesn't like it, it blocks your computer from showing it to you.

There are also two types of page requests. The first is is an http request. This means the data from the website holding the information is sent normally. When K9 blocks your page, they redirect you to their own block-page. Large sites however with sensitive data will redirect you to their https (or http secure)site. This means that your computer receives the data in code and the computer then decrypts it. But because the page is secure, K9 cannot fiddle with it to redirect you to their block-page. Therefore even if the site is blocked under the K9 settings, you will still have full access to that page.

To counter this, K9 have created an option under Advanced Settings to filter secure traffic. When this is checked and K9 sees a secure request going to a blocked website, they simply block the port to the website and your browser will report that it cannot reach the website. Always leave this checked! When this is not checked it is as if there is no filter on your computer!

K9 also lets you enforce safe search on all sites. This should always be checked! However know that if you connect to a site which you have allowed, and you access that site securely, K9 will not be able to stop you changing the safe search settings. That is why if you need Google open, you should not open the topic of Search Engines, because even though Safe Search will be enforced at the address http://www.google.com, it will not be enforced at https://www.google.com. The way round this is to block the Search Engine topic, and to specifically let www.google.com in your Always Allowed list. K9 will make sure to not let you connect securely.

Finally to create a whitelist just choose custom setting, and block all topics, and on the Always Allowed page add the sites you want. Note that many large sites keep their style-sheets (the page that gives the page decoration) on a different website so you will need to add that page as well to get the site to look normal. You can find the page by looking at the page source in your browser and looking where the pages ending in .css or .js are located. Then just copy the location into you Always Allowed list.

I hope that's enough to get you going so far, let me know if you have any questions and I will update my post accordingly!


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1   Wow, what an answer. Gonna take me some time till I get all of this. :-) - Old WineJul 03  '12 at 21:58
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    What about K9's own safesearch is that alright? - gadol hadorJul 03  '12 at 22:14
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    Just checking out K9 because of you. Never even thought about it until now! - busy gabbaiJul 03  '12 at 23:45
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In the Democratic Republic of Congo where I serve as Chief Rabbi in the official capacity, I have been using this answer to all my many disciples who have been asking me Shailos on k9. With much appreciation for being Mezakeh The tzibbur.

ר קלונימות קלמן בן גוונה סימון ווסלברגר


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2   i wouldnt go as far as that, but I have heard that this answer is being linked to by other sites! - Old WineJul 10  '12 at 13:52
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1   Please refrain from referring to answers as an answer itself. Please use the comment feature as a means of communicating with the author! - Yehuda HaMaccabiJul 10  '12 at 14:28
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1   is there even internet connection in Congo? - disgruntledGoatJul 11  '12 at 08:32
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How can i put skype in the whitelist? Skype.com is not working.


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    Hi Betty, Welcome to Need An Eitzah. Not sure why you cant put in the whitelist. Anyway why do you need the website, you just download the program and then you can use it without using the website! - Yehuda HaMaccabiOct 15  '12 at 11:37
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    Is it blocking it with a K9 block page or is the browser saying it cannot connect to the page but the message is not from k9? - Shmuel YaacovsonOct 16  '12 at 11:34
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