jrklein, Author at Jason Klein

Code Signing errors when Dual Signing SHA-1 and SHA-256 for Legacy Systems including Windows XP SP3

jrkleinMarch 18, 2018March 19, 2018

PROBLEM: Unable to validate Digital Signature on Windows XP SP3 I recently encountered the following errors when attempting to validate the Digital Signatures for our application on Windows XP SP3: Digital Code Signature (Right-click application > Properties > Digital Signatures > Details) Digital Signature Information The certificate is not valid for the requested usage. Certificate Information […]

Hosting Static Web Assets on S3 with CloudFront SSL

jrkleinJanuary 9, 2018January 9, 2018

Follow this guide to host a static asset in an S3 bucket and deliver the asset to end users through CloudFront with the default SSL hostname (e.g. http://d29ob8ckmhh7kh.cloudfront.net/). Follow the second section of this guide to configure S3 + CloudFront SSL with a custom domain name (e.g. https://example.logicforte.com/). Pricing CloudFront cost is based on traffic. We […]

Suppress GnuPG entries from systemd and gpg-agent flooding Debian daemon.log during SSH connection

jrkleinDecember 9, 2017December 9, 2017

Ever since upgrading to Debian 9, the daemon.log on one of our very active SSH hosts has been flooded with many extra GnuPG entries generated by systemd and gpg-agent every time a user connects via SSH.

I implemented an rsyslog filter after considering solutions discussed…

AWS EC2 Secondary Private IPs on Debian 9 (Squeeze)

jrkleinAugust 19, 2017August 19, 2017

I use this script to automatically bind AWS EC2 “Secondary Private IP” addresses to my Debian 9 (Squeeze) instance. I set a cron job to run this script several times per hour so that new IP addresses are automatically added to the instance. Prerequisites The EC2 instance is running Debian 9 (Squeeze). Script may also […]

MySQL Master/Slave Replication on AWS EC2/EBS

jrkleinMarch 22, 2017March 22, 2017

This very brief guide assumes you have already setup a Master/Slave relationship between two MySQL servers hosted on EC2 and are looking for an efficient way to clone large Master databases to the Slave server. I use this method to clone a 150GB EBS volume containing Master databases to a Slave in about an hour. Most of […]

Jason Klein

My personal collection of reference material and tech tips

Author: jrklein

Code Signing errors when Dual Signing SHA-1 and SHA-256 for Legacy Systems including Windows XP SP3

Hosting Static Web Assets on S3 with CloudFront SSL

Suppress GnuPG entries from systemd and gpg-agent flooding Debian daemon.log during SSH connection

AWS EC2 Secondary Private IPs on Debian 9 (Squeeze)

MySQL Master/Slave Replication on AWS EC2/EBS