Simon MottAll about me
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Simon Mott

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2 Articles

Dual-stacking Proxmox Web UI (pveproxy)

by Simon

As part of my recent (and ongoing) project to implement native IPv6 on my own infrastructure (except at home… I’m looking at you Hyperoptic), I decided to try to dual-stack as much as possible so that when I have IPv6 connectivity, services would prefer that over IPv4, without making things unavailable.

As it turns out, Proxmox’s Web interface (pveproxy) doesn’t listen on the IPv6 address family by default. This stumped me for a little while, but its pretty simple to fix when you know whats going on.

This post is going to spend most of its time explaining why this happens rather than the fix. If you’re just here to see how to do it, check below.

Slow DNS resolving using bind9 as caching resolver

by Simon

I currently have 4 DNS servers across my estate and until recently these were all configured to forward all queries to Google DNS (8.8.8.8). I ended up having an issue with Google caching an undesired record value so I opted to change my DNS servers so that they no longer forward queries elsewhere, but instead try to answer it themselves; Doing this gives me slightly more control over my DNS cache.

As I use named (bind9) this was a pretty trivial change – Simply remove the forwarders { 8.8.8.8; }; clause in my configuration and that should be that.

During my post-change testing though I’d noticed that resolution was taking significantly longer for un-cached queries than I’d expect (microsoft.gointeract.io is only used to illustrate my issue):