76: Time for a Change

This week, we'll be talking to Henning Brauer about OpenNTPD and its recently revived portable version. After that, we'll be discussing different ways to securely tunnel your traffic: specifically OpenVPN, IPSEC, SSH and Tor. All that and the latest news, coming up on BSD Now - the place to B.. SD.

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Strange timer bug in FreeBSD 11

Peter Wemm wrote in to the FreeBSD -CURRENT mailing list with an interesting observation
Running the latest development code in the infrastructure, the clock would stop keeping time after 24 days of uptime
This meant things like cron and sleep would break, TCP/IP wouldn't time out or resend packets, a lot of things would break
A workaround until it was fixed was to reboot every 24 days, but this is BSD we're talking about - uptime is our game
An initial proposal was adding a CFLAG to the build options which makes makes signed arithmetic wrap
Peter disagreed and gave some background, offering a different patch to fix the issue and detect it early if it happens again
Ultimately, the problem was traced back to an issue with a recent clang import
It only affected -CURRENT, not -RELEASE or -STABLE, but was definitely a bizarre bug to track down ***

An OpenBSD mail server

There's been a recent influx of blog posts about building a BSD mail server for some reason
In this fancy series of posts, the author sets up OpenSMTPD in its native OpenBSD home, whereas previous posts have been aimed at FreeBSD and Linux
In addition to the usual steps, this one also covers DKIMproxy, ClamAV for scanning attachments, Dovecot for IMAP and also multiple choices of spam filtering: spamd or SpamAssassin
It also shows you how to set up Roundcube for building a web interface, using the new in-base httpd
That means this is more of a "complete solution" - right down to what the end users see
The series is split up into categories so it's very easy to follow along step-by-step ***

How DragonFlyBSD uses git