Simon Mott https://www.simonmott.co.uk All about me Sun, 25 Jun 2023 18:41:15 +0000 en-GB hourly 1 https://wordpress.org/?v=6.0.7 Auto mount LUKS without a filesystem https://www.simonmott.co.uk/2023/06/auto-mount-luks-without-a-filesystem/ Sat, 24 Jun 2023 14:52:58 +0000 https://www.simonmott.co.uk/?p=1006 One of my friends recently installed a new storage server in our shared lab environment and graciously gave me some storage space on it via iSCSI. I use Proxmox for my personal lab, and I intended to store some non-critical VM disks on this new storage so I could play around with properly using HA […]

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A Stratum 1 Time Server – The Basics https://www.simonmott.co.uk/2022/02/a-stratum-1-time-server-the-basics/ Sat, 12 Feb 2022 16:31:06 +0000 https://www.simonmott.co.uk/?p=254 A while ago, I decided to play around with trying to create something cheap that would be able to synchronise its time by using GPS instead of over the internet – essentially building my own Stratum 1 time server. I intend this to be a series of articles about NTP and time servers, but let’s […]

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Ubiquiti EdgeRouter IPsec performance https://www.simonmott.co.uk/2018/08/ubiquiti-edgerouter-ipsec-performance/ Wed, 29 Aug 2018 17:11:16 +0000 https://www.simonmott.co.uk/?p=718 I’ve been working on setting up a lab environment for myself and decided to pick up a couple of Ubiquiti’s EdgeRouter 4 routers to act as my core routing devices, along with an EdgeRouter X to act as my out-of-band router. These new devices, along with an EdgeRouter Lite loaned to me for this article by Dom at LoveServers, […]

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Dual-stacking Proxmox Web UI (pveproxy) https://www.simonmott.co.uk/2018/06/dual-stacking-proxmox-web-ui-pveproxy/ Wed, 20 Jun 2018 20:49:59 +0000 https://www.simonmott.co.uk/?p=352 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 […]

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Ethereum Mining with NVIDIA on Linux https://www.simonmott.co.uk/2017/07/ethereum-mining-nvidia-linux/ Thu, 06 Jul 2017 00:05:52 +0000 https://www.simonmott.co.uk/?p=277 Bitcoin has been getting a lot of attention in the media lately; primarily due to its association with recent high profile ransomware incidents. Bitcoin was first introduced back in 2009 as a digital currency and has been steadily gaining traction since, increasing almost 140% in value so far this year! Bitcoin however, is not the […]

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Shoehorning Proxmox into mdadm RAID1 https://www.simonmott.co.uk/2017/03/shoehorning-proxmox-into-mdadm-raid1/ Sun, 12 Mar 2017 01:04:30 +0000 https://www.simonmott.co.uk/?p=247 My home server has always been somewhat of a Frankenstein’s Monster when it comes to hardware. Until about 2 years ago, it consisted of a large JBOD array of several different drive sizes with no kind of redundancy what-so-ever – for both OS and Data disks. That all changed though when I decided to invest […]

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Routed Subnets, rp_filter and arp_ignore https://www.simonmott.co.uk/2016/09/routed-subnet-rp_filter-arp_ignore/ Fri, 23 Sep 2016 20:40:25 +0000 https://www.simonmott.co.uk/?p=222 Over the past couple of years, I’ve been quite accustomed to my ISP providing me with an IP block (typically a /29) instead of just a single static IP, but recently I’ve switched to Hyperoptic for their FTTP offering (Because, Gigabit!). Unfortunately, they seem to only offer single IPs for residential service and require you […]

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Odd behaviour with /etc/mtab being a regular file https://www.simonmott.co.uk/2016/07/odd-behaviour-with-etcmtab-regular-file/ Wed, 13 Jul 2016 19:53:35 +0000 https://www.simonmott.co.uk/?p=224 One of our customers had recently requested a Bare-Metal Restore (BMR) of one of their servers; which is a pretty routine task for us. However, upon bringing the restored server up I’d noticed some odd behaviour with some of its services, notably snmpd. Our monitoring successfully polls most metrics that we look for, however fails […]

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Growing my Linux RAID5 array https://www.simonmott.co.uk/2016/07/growing-my-linux-raid5-array/ Sat, 09 Jul 2016 20:00:11 +0000 https://www.simonmott.co.uk/?p=219 Recently I’ve needed to expand my RAID5 array by adding another disk. My experience with mdadm since starting to use it back in 2009 was for RAID1 only so I’ve never really needed to actually expand an array and so I thought I’d document the process here for future reference. This process should in theory […]

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Slow DNS resolving using bind9 as caching resolver https://www.simonmott.co.uk/2016/06/slow-dns-resolving-using-bind9-caching-resolver/ Sun, 26 Jun 2016 02:30:46 +0000 https://www.simonmott.co.uk/?p=210 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 […]

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