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Kian Bradley’s Blog

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Resurrecting a dead torrent tracker and finding 3 million peers

So I was uh, downloading some linux isos, like usual. It was going slowly, so I opened up the Trackers tab in qBittorrent and saw the following:

Supporting modern https on Windows XP

I managed to get modern SSL/TLS connections working under Windows XP, by running a lightweight Linux VM which strips the TLS headers and re-applies a self-signed certificate:

Running rumprun for Xen in Ubuntu 16.04

Running rumprun under Xen isn’t hard, but it’s less documented than running it under KVM. This page is similar to Rumprun’s guide to building rumprun unikernels with a few Xen-specific changes.

Setting up NAT networking in Xen using virsh

There are two main ways to set up networking in Xen. You can use a bridged network, or you can set up NAT. A bridged network means that the guest domains will talk to the router directly to get an IP address. NAT networking creates a subnet local to your machine, and the guest domains will talk to dom0 to get an IP address.

Setting up Xen in Ubuntu 16.04

Xen is the future, you guys. While KVM has very good support and widespread use, the fact that it exists as a Linux kernel module means it runs as basically another process under linux, with all of the scheduling issues and limitations that come along with being a process. Xen works by “pinning” the host and guest operating systems to specific cores, allowing for much greater separation of guests.…