Tag Archives | SSL




Boffins Crack OpenSSL Library Using Power Fluctuations

Now this is a very interesting technique, as far as I know I’ve not seen anything similar to this before. It’s like a rather bizarre meld of hardware hacking and software exploitation using cryptographic algorithm cracking techniques. Some rather smart fellas have found a way to extract the private SSL key from a device by […]

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SSL Renegotiation Bug Succesfully Used To Attack Twitter

When this SSL Renegotiation bug hit the news, most people said it was a theoretical attack and was of no practical use in the real world. But then people tend to say that about most things don’t they until they get pwned up the face. It turns out the rather obscure SSL flaw can be […]

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SSL VPNs and OpenVPN – Part IV

4. Brief How-to …. Creating Multiple clients to Single site tunnels. Example of using PKI to create a client-to-site VPN: For a road warrior or roaming/multiple user scenario, static keys based VPNs don’t scale well. You will need to implement a PKI if you have Hub and Spoke architecture of VPN. From the OpenVPN.net website: […]

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SSL VPNs and OpenVPN – Part III

3. Brief How-to ….. OpenVPN and Site-to-Site Tunnels. OpenVPN can be implemented either Site-to-site or client-server model. I will take example configurations of both models. If you want to implement site-to-site configuration, the best way is to use static-keys instead of PKI. Using static keys, you can have your VPN tunnel up and running in […]

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SSL VPNs and OpenVPN – Part II

2. Why OpenVPN Here, in this article, I will lay down the emphasis on one important Open-Source SSL VPN software written by James Yonan and contributed by several others, which proposes security without the inherent complexity of IPsec AND using a trusted design of client component and VPN server. Usually VPNs require end points which […]

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SSL VPNs and Using OpenVPN

Requirement: To connect to a VPN server in a different country. Situation: A country which has proxies at every gateway. Issues: VPN based on IPSec is fussy when it comes across networks which are NAT’ted/ proxied. The Security Parameters Indexes don’t match and clients do not get connected. Objective: To connect VPN server in a […]

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