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There is no such thing as an unblockable VPN. Every port and every protocol can be blocked (by an ISP).<br />
What you could try is setting up a secure connection over a non-standard port (Standards are, ssl:22, <a href="https:443" rel="ugc">https:443</a>, etc). But it also depends on what you want to use it for.
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There is no such thing as an unblockable VPN. Every port and every protocol can be blocked (by an ISP).
What you could try is setting up a secure connection over a non-standard port (Standards are, ssl:22, https:443 [https:443], etc). But it also depends on what you want to use it for.

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I think they cannot block 443 or 80. So, any solution uses these ports?
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I think they cannot block 443 or 80. So, any solution uses these ports?

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As said, depends on what you want to use it for (?)
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As said, depends on what you want to use it for (?)

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For PC to use Skype, MSN, iTunes app store and to open blocked websites.<br />
<br />
For iPhone, for using Viber, Skype and also for app store.
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For PC to use Skype, MSN, iTunes app store and to open blocked websites.

For iPhone, for using Viber, Skype and also for app store.

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I found the solution finally
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Hello experts,<br />
<br />
I am looking for a solution of VPN which works with our ISP which blocks almost everything. <br />
<br />
As I know there are many types of VPNs, some require certificate, some can be authenticated by username and password only. <br />
<br />
Would you please advice for a solution which cannot be blocked?
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Hello experts,

I am looking for a solution of VPN which works with our ISP which blocks almost everything. 

As I know there are many types of VPNs, some require certificate, some can be authenticated by username and password only. 

Would you please advice for a solution which cannot be blocked?

Unblockable VPN for iPhone and PC

A virtual private network (VPN) is a network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or travelling users access to a central organizational network securely. VPNs encapsulate data transfers using secure cryptographic methods and other security mechanisms to ensure that only authorized users can access the network and that the data cannot be intercepted.

The iPhone is a smartphone made by Apple Inc. It and the iPad, along with several other mobile devices from Apple, run on the iOS operating system, which has its own topic, as does the iPad for device-specific questions. Native iOS applications are written in Objective-C or in Swift using the Cocoa Touch frameworks or HTML5 compiled with the help of a package manager such as Adobe PhoneGap; a common IDE is Xcode.

iPhone

Network security consists of the policies adopted to prevent and monitor authorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the authorization of access to data in a network, and covers a variety of computer networks; conducting transactions and communications among businesses, government agencies and individuals. Networks can be private, such as within a company, and others which might be open to public access.