Category: Linux

Jul 29

Enabling BBR Congestion-Based Congestion Control on kernel-xen

With the release of kernel-xen version 4.9.40, I have enabled CONFIG_TCP_CONG_BBR. This adds support for using BBR to improve the throughput from your servers (mostly web servers) to your clients. If you run my kernel-xen package on your Xen guests, you can also take advantage of this new feature. To enable, ensure you are running …

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Jun 01

OpenWRT builds move to LEDE

Recently I’ve moved the builds for the WD MyNet systems to LEDE. I’ve also started building for more than just the MyNet N750 – and now *all* ar71xx systems will get a nightly build. The build directories now follow the date of the build, not the revision number. The new builds are available at: http://openwrt.crc.id.au/

May 31

Why people hate #systemd

So yeah, I’ve been forced into using SystemD for just about everything now that the entire community has taken the koolaid. I recently had a question where if a ConditionFileIsExecutable fails in the [Unit] section, the logs say that the service was started – but in fact the service won’t attempt to be started. No …

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May 28

Postfix, LDAP and Fusion Directory

Recently, I’ve been going all out on deploying LDAP and realising how much easier it would have made my life over the years. Fusion Directory has proven to be a good management interface for keeping things in check. That’s the easy part though – now how do you go about making all your software to …

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Aug 02

DNS Oops. Crashing bind from remote

It’s been a while since my last post – and this one is a doozey. So Bind is one of the most popular DNS servers on the planet. Just about everyone runs it. So when news breaks that a specially crafted request can cause the named process to exit, then a problem is presented. Enter …

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