John Lister's picture

CPU Hyper-threading Reverse Engineered to Spy on Processes

One of the most useful features in computer hardware has a security flaw. It's to do with the way processors handle information. All computing tasks are reduced down to a set of calculations. The central processing unit (CPU) is the "brain" of the ... computer that physically carries out these calculations. Each modern-day CPU has one or more cores , which is essentially multiple "brains" on a single CPU chip. A multi-core CPU means that multiple calculations can be done at once, which reduces the time to carry out a task. Many processors also use a technique called ... (view more)

Dennis Faas's picture

How to Fix: OpenVPN 'SSL_CTX_use_certificate:ca md too weak'

Infopackets Reader Steve T. writes: " Dear Dennis, I recently upgraded my OpenVPN from version 2.3.2 (back in 2014) to the latest version 2.4.6, but now my OpenVPN server is broken. I checked the log files and it says ' SSL ... routines:SSL_CTX_use_certificate:ca md too weak ', followed by 'Cannot load certificate file /path/cert.crt'. I have tried embedding my certificates inside the server.ovpn file (rather than having it point somewhere externally), but that does not help. It simply won't load the certificate. I've researched this issue for days and keep coming across a forum post on the ... (view more)

Dennis Faas's picture

How to Fix: OpenVPN Won't Resolve After April Update

Infopackets Reader Bob T. writes: " Dear Dennis, Thank you for your Windows 10 article on How to Fix: Computer Name Won't Resolve on Network (April Update) . I tried the fix and it works great - the computers on my local network can see each other. ... However, when I use OpenVPN to connect to my remote server, the server's computer name still does not resolve, whereas before it did before the Windows 10 April Creators Update. You mentioned there is an additional fix for OpenVPN with the April Creators Update in order to get the computer names to resolve. Can you please help? " My response: I am ... (view more)

Dennis Faas's picture

How to Fix: OpenVPN SMB Not Working; Can't Resolve Names

Infopackets Reader Paul P. writes: " Dear Dennis, Thanks so much for your informative website. I have read a few of your articles on OpenVPN, and set up a free VPN connection to my home PC. Now I can connect to my personal, free VPN using my Android ... smartphone when I'm away from home without having to pay for a VPN service! It works so great I decided to connect my laptop to the VPN - however I am not able to resolve machine names on my network. For example, when try to access \\home-pc using Remote Desktop, it won't work. The only way I can make it work is if I enter in the IP address of the ... (view more)

Dennis Faas's picture

How to Fix: OpenVPN Remote Desktop Not Working (Suddenly)

Infopackets Reader Paul P. writes: " Dear Dennis, I've been using OpenVPN, coupled with Microsoft's Remote Desktop Protocol (RDP) to connect my laptop to my home PC when I'm on the road. It's worked great for a while now, however, suddenly remote ... desktop has stopped working and I can't connect to my PC anymore. The strange thing is that OpenVPN seems to complete the connection, so I am not sure why my RDP won't work any more. Can you help? " My response: I asked Paul if he would like me to connect to his laptop using my remote desktop service in order to investigate the problem further, and ... (view more)

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