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I need to provide redundancy to an IPSec link between two premises. I would like to have no single point of failure and to diversify technologies. What could I use please?

Are the following leads possible:

  • HTTPS link encrypted using PKI
  • 4G link
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    This looks more like a network design question than a security question. – schroeder Oct 3 '18 at 14:06
  • With security in mind, I raised myself the same question and could not answer. – lalebarde Oct 3 '18 at 15:34
  • @schroeder of course, feel free to move it if it is better – lalebarde Oct 3 '18 at 15:53
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If you're looking to provide redundancy between sites, you're right that a TLS would be a viable solution for an extra security protocol and a 4G connection has the potential to be a form of redundancy for the site-to-site connection.

Your question isn't really clear on what you're asking for specifically, because HTTPS and 4G work on entirely different levels. If you're talking about protocol redundancy, depending on your use case, you could easily use another encryption technology such as TLS or SSH to connect the two sites. If you're wanting connection redundancy I'd recommend using a secondary line from a different ISP or like you said, a 4G connection to maintain the connectivity in the event of your VPN having downtime. Obviously you can combine the two since, like I said, they work on entirely different levels. For example; you can get a 4G connection and use TLS over it.

  • Actually both of them – lalebarde Oct 3 '18 at 15:41
  • I believe the answer does cover "both", in the last sentence. – xorist Oct 3 '18 at 17:49

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