Archive for the ‘networking’ Category

TL;DR I need local DNS for various home lab things, but the Windows VMs I’ve been using can be slow and unreliable after a power outage (which happens too frequently). Moving to BIND turned out to be much easier than I feared, and I chose OpenWRT devices to run it on as I wanted reliable […]


TL;DR I thought I could put Squid in front of an SSH tunnel, but it can’t do that. Thankfully Polipo can do the trick. Why? I was quite happy when it was just spies that were allowed to spy on me (even if they might have been breaking the law by doing so), but I […]


Late last year AWS launched Private DNS within Amazon VPC as part of their Route 53 service. This allows customers to create DNS entries that are only visible within a VPC (or group of VPCs). It’s also possible to have ‘split horizon’ DNS where servers inside a VPC get different answers to the same queries versus users […]


All of the major cloud providers now offer some means by which it’s possible to connect to them directly, meaning not over the Internet. This is generally positioned as helping with the following concerns: Bandwidth – getting a guaranteed chunk of bandwidth to the cloud and applications in it. Latency – having an explicit maximum […]


Yesterday I delivered a tutorial as part of the Open Network Users Group (ONUG) Academy: To go through the tutorial yourself you’ll need an AWS account and an SSH client (and the Internet access and browser you’re using to read this). To complement the slides there’s a wiki on GitHub with all of the relevant command […]


At last week’s Ignite conference Microsoft announce a set of new networking capabilities for its Azure cloud described as being ‘for a consistent, connected and hybrid cloud’. The new capabilities include improvements to ExpressRoute, Azure’s Internet bypass offering, availability of ExpressRoute for SaaS offerings such as Office 365 and Skype for Business, additional VPN capabilities […]


NAT in the hat

06Apr15

TL;DR Whilst on vacation in Spain I’ve found networks that seem to be like something out of a Cory Doctorow novel – domestic WiFi routers hanging off domestic WiFi routers hanging off domestic WiFi routers. At first I thought it was my Airbnb host being cheap and having a cosy arrangement with a neighbour to […]


The TP-Link WR-703N is a nice, hackable pocket WiFi router. I’ve seen them put to some interesting purposes, but I didn’t own one until yesterday when the kind folk at QCon Shanghai gave me one. I’m not a fan of factory TP-Link firmware at the best of times, but more so when it defaults to […]



The WRTnode is a great new open source hardware dev board that takes the guts of a typical home router and makes it hackable. It’s more than an Arduino, less than a Raspberry Pi, and very network capable. WRTnode runs the OpenWRT Linux distribution, which I’ve used in the past on some of my home […]