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Category Archives: Linux

Sunshine with clouds – Ubuntu’s game changing release

Thursday, October 29, 2009

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 Shuttleworth [...]

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Routers treat HTTPS and HTTP traffic differently

Tuesday, October 20, 2009

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 like [...]

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SSL Timeouts and layer 3 infrastructure

Saturday, October 17, 2009

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. [...]

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How to mirror someone elses web server with iptables

Friday, October 16, 2009

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 [...]

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Super fast & easy virtual server setup on Ubuntu (Jaunty)

Thursday, October 15, 2009

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. It will add [...]

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