Safari says "cannot establish secure connection" in many sites.

I am using Safari 7.1
Whenever I try to open sites like Facebook and others a message is displayed that reads "safari cannot establish a secure connection".
Is this the problem of my Safari (or my Mac) or is it the problem of the connection.
Please answer cause I am a little worried about my Mac.
Thank You.

My Safari 8.0 (OS X Yosemite 10.10.1) has the same trouble as well, even my macbook have completely clean reinstalled.

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When you have a problem with one particular site, a good "first thing to try" is clearing your Firefox cache and deleting your saved cookies for the site.
(1) Bypass Firefox's Cache
Use Ctrl+Shift+r to reload the page fresh from the server.
(You also can clear Firefox's cache completely using:
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On the Network mini-tab > Cached Web Content : "Clear Now")
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We support IMAP (yahoo/gmail/hotmail), I apologize for the inconvenience.
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Hello !
i am trying to connect to this site and i always get a Secure Connection Problem.
It is the site of my university where i check my grades.
I always get the picture i attach.
It is very annoying tbh.
Any suggestions ? I dont have the same problem when using any other browser or i try to connect via iPad or iPhone.
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I have switched off all my extensions and it didnot work.
Also i dont have Rapport (or how it is called).
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Check that the date (including the year) and time shown by your system clock are correct.
Restart your router and broadband device, if different.
Try another browser, such as Firefox.
If you connect to the Internet through an HTTPS or SOCKS proxy server, follow the instructions in this support article, or deselect the proxy entirely.
Boot in safe mode and try again.
Follow the instructions in this support article to change your DNS settings.
If possible, test on a different network, such as a public Wi-Fi hotspot or the cellular network of your phone.

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I've tried all the solutions I can find to no avail, but cannot seem to establish a secure connection to the iTunes store. No error code just a blank iTunes Store screen and a never ending attempting connection. Some of what I've tried:
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* SSL and TSL checked
* No proxy and tried to check and uncheck auto detect settings
* Used Autoruns to be sure no other LSP providers
* Ensured Windows Firewall has iTunes fully allowed (even reset Firewall to default and then reallowed it again)
* Removed and/or disabled all security software to test for possible blocking
* Reset Winsock and rebooted
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* Removed iTunes, Quicktime and any other Apple related items I could find with RevoUninstaller to look for leftover entries, rebooted and reinstalled (several times)
* Cleaned all cookies, caches and old registry entries
* Machine is free of all malware
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I finally went into my services and looked at every service that wasn't set to start automatically and read the description. If it sounded like it could be enabled safely (obviously that was a decision I had to make for myself and the security of my machine) I enabled it and set it to start automatically. Anything with regards to peer to peer, internet related, and homesharing was certainly something I considered. There was also a service called IKE that was stopped for some reason that was recommended never to be stopped. I personally enabled over 35 different services. Somewhere in there (and I have no idea which service or combination of services) it fixed my problem. The interesting part was that I never went in and stopped any of these services or changed the status on my own, so I have no idea where they got changed - and nowhere in any of the reinstalled did Apple products set the services back to what they needed them to be. Go figure.
As an aside - Bonjour was enabled AND running but iTunes kept telling me it wasn't. That is what started my search in the services to start with. I did try iTunes support but they were less than helpful and directed me back to all the same tech bulletins or to call for paid support - which I wasn't about to do for a free program that just stopped working.
iTunes is now opening like a charm and is connecting perfectly for me. Obviously, this is something you'd want to do with caution and I'd suggest that before you blanket go and do as many as I did that you might want to carefully select the ones that you look at setting. My first reboot took a bit but after that things have been running smoothly. Your mileage may vary and take this with caution. You may want to enable a few at a time and test instead of doing what I did.

Safari says "cannot establish secure connection" in many sites.

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