I’m going to use the term “Cloud” in this post which I despise for it’s nebulosity. The press has bandied the term around so much that it means everything from the Net as a whole to Google Apps to virtualization. My “cloud” means a cluster of virtual machines. I’ve been a huge fan of Mark […]
Well the title says it all. Internet routers live at Layer 3 [the Network Layer] of the OSI model which I’ve included to the left. HTTP and HTTPS live at Layer 7 (Application layer) of the OSI model, although some may argue HTTPS lives at Layer 6. So how is it that Layer 3 devices […]
October 20, 2009 | Linux, Technology | 3 comments
I’ve spent the last 5 days agonizing over a very hard problem on my network. Using curl, LWP::UserAgent, openssl, wget or any other SSL client, I’d see connections either timeout or hang halfway through the transfer. Everything else works fine including secure protocols like SSH and TLS. In fact inbound SSL connections work great too. […]
October 17, 2009 | Linux | 1 comment
It took me a while to find this – I needed it for testing purposes, nothing malicious. If you’d like your web server somewhere on the web to pretend to be any other web server, even a secure one, you can do the following. x.x.x.x is your own server and y.y.y.y is the ip of […]
October 16, 2009 | Linux | No comments
While I upgrade to Karmic, here’s a quick setup to get a virtual ubuntu server running on a real ubuntu server: As root: ubuntu-vm-builder kvm jaunty –hostname dev2 –addpkg openssh-server vim -d /usr/local/vms/dev2 –mem 256 –libvirt qemu:///system This will create a jaunty jackalope ubuntu virtual server using the KVM hypervisor. The hostname will be dev2. […]