Author Archives: Karl Auer

They keep amazing me… ssh tunnelling to a MikroTik

It amazes me when a $50 device supports ssh tunelling! I wanted to run the web interface on a MikroTik router I’d just installed. Command line access is all very well, but for a lot of stuff, the web interface … Continue reading

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IPv6 – get to the church on time!

In a mailing list I frequent, the conversation turned to tunnels as a means of getting IPv6 access. A personage of note who shall remain nameless here said: > IPv6-over-IPv4 tunnels are perhaps worse than not doing it at all. … Continue reading

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MikroTik variables and /import

In the past couple of days I have been configuringĀ  bunch of MikroTik routers. The configurations differ, but they all have a few things in common, and I wanted to record those things in a separate file as variables. My … Continue reading

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Mandatory comment on the NBN

Warning: Australian-only content :-) Now that the Coalition has finally released its NBN policy (here’s a copy) here’s my take on it: Fibre has a future. Copper has no future. Why is that something that people find so hard to … Continue reading

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IPv6 source address selection – what, why, how?

IPv6 source address selection must be very irritated; destination address selection gets all the press coverage. This article will start to redress the balance, by talking about what IPv6 source address selection is, why it is needed, and how it … Continue reading

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Why Not NAT?

NAT came into existence because of IPv4 address scarcity. With IPv6, that reason disappears. So, if we no longer need to multiplex addresses, should we retain NAT?

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Migrating applications to IPv6

So you have an application. It was written (as far as you know) without IPv6 in mind, and now it has to work with IPv6. How hard is that going to be? Well, it depends on the application. Most of … Continue reading

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/etc/gai.conf – it ain’t what you think it is

If you read the doco (like “man gai.conf“) you would be forgiven for thinking that the contents of /etc/gai.conf controlled source and destination address selection in IPv6. You would be wrong.

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