Author Archives

• Fixing SSL Labs Grade on F5 Big-IP – Disabling TLSv1 and TLSv1.1

  By GrumpyTechie on October 31, 2019 • ( 6 )

  

  So, it’s again time to start worrying about your SSL Labs grade. Coming January 2020, any site still supporting TLSv1 and TLSv1.1 will have their grade capped to B. As we all know, this is unacceptable, so we’ll once again… Read More ›

• Adding SANs to Let’s Encrypt Certificates – LE Series Part 2

  By GrumpyTechie on September 20, 2019 • ( 0 )

  

  As we already went through in part 1 of this series, requesting certificates using Let’s Encrypt and certbot is rather easy. Today we’re going to look at how you can request certificates with multiple Subject Alternative Names, or SANs for… Read More ›

• Enabling HTTP/2 on NGINX – NGINX Tricks Part 3

  By GrumpyTechie on September 12, 2019 • ( 1 )

  

  As you might have heard, there’s a new version of HTTP out there that’s far superior to HTTP/1.1. I won’t go into what exactly has changed in HTTP/2, but it’s faster and more secure, and allows for some even more… Read More ›

• Implementing HTTP 418 Errors on NGINX – NGINX Tricks Part 2

  By GrumpyTechie on September 5, 2019 • ( 4 )

  

  A year or so ago I got intrigued about how to “properly” implement custom HTTP errors on NGINX after watching this rather funny DEFCON talk. The speaker talks about returning “weird” HTTP codes since browsers usually seem to display anything… Read More ›

• Redirecting IP Traffic to HTTPS – NGINX Tricks Part 1

  By GrumpyTechie on August 26, 2019 • ( 2 )

  

  Lately I had a peculiar issue, I wanted to secure a web server running NGINX with HTTPS using Let’s Encrypt, but almost all traffic to said web server request the web page using the IP address of the server, since… Read More ›

• Getting started with Let’s Encrypt & Certbot – LE Series Part 1

  By GrumpyTechie on August 23, 2019 • ( 2 )

  

  I’ve been enjoying myself immensely playing around with Let’s Encrypt these last few days, and discovered a couple solution to common problems and issues, so I thought I’d make a small guide mostly for my own reference on how to… Read More ›

• Configuring Ubuntu to Patch Itself

  By GrumpyTechie on April 28, 2019 • ( 0 )

  

  After a couple of years in the IT infrastructure world, you’ll be faced with the greatest task of all, updating servers every month or so. This has always been the most brain dead task imaginable, but now with virtualization, we… Read More ›

• Exporting Exchange Mailboxes to PST files

  By GrumpyTechie on November 10, 2018 • ( 0 )

  

  As any admin at any company will tell you, you can never really trust anybody that tells you it’s okay to delete something, ever. This holds especially true for email. If I had a euro for every time I was… Read More ›

• How to Configure SNMPv3 on Cisco iOS Switches – Cisco Networking Series Part 2

  By GrumpyTechie on October 5, 2018 • ( 0 )

  

  Configuring SNMPv3 can be a daunting task compared to earlier questions, just from the copious amount of authentication parameters compared to earlier SNMP versions. In this short primer I’ll walk you through the steps necessary to set it up to… Read More ›

• The Ultimate Trailer Plug Wiring Chart

  By GrumpyTechie on September 10, 2018 • ( 0 )

  

  I’ve been working on converting all my trailers and cars to 13-pin plugs and sockets lately, as I got fed up with corroded connectors and adapters. What I quite quickly ran into was the issue of finding a reliable chart… Read More ›