As part of my regular annual website refresh, I decided to take a pretty drastic step and move from WordPress to a static site generator called Hugo. I’ve kept my WordPress install continually up to date since early 2009 and it served me well, but I needed a change. I also went back through the archives and culled all my old blog posts - I only kept the most trafficked and the ones that Future Will might want to reference.Read the rest →
I am an OSX user, and I run a lot of VMs using VMware Fusion 7 which I have been very happy with since I purchased it. One thing that always bugged me is that Fusion allocated a different IP address to each VM every time it started up, or resumed from a suspend. Applications that I use that have references to those IP addresses always had to be reconfigured each time I wanted to use them.
More recently, I’ve been testing out lot of different type 1 Hypervisors (ESXi/vSphere, Proxmox, XenServer etc) which usually make the assumption that they will be given a static IP (which they should in the real world).
So imagine my delight when I discovered that you can indeed allocate static IP addresses to VMs simply by editing a single config file.Read the rest →
Amazon Web Services (AWS) provides a really great service-oriented way of creating virtual machines in the cloud with their Elastic Cloud Compute (EC2) system. There’s many reasons you’d want to increase or decrease the size of an EC2 instance on AWS. Maybe you misjudged how much traffic you’d be getting, or maybe you need more horsepower to finish a certain workload in a shorter time.
Increased instance sizes on AWS of course come with a higher price tag, but depending on what you need them for, the increased performance could pay for itself.Read the rest →
I used the free Dynamic DNS (DDNS) service from Dyn since about 2006 and never had a single issue with it. That all changed when they phased out their free accounts. I was forced to find an alternative, so I went with No-IP.com which was easy to set up and provided a great service.
Recently, No-IP has been having some legal troubles that seem to be revolving around Microsoft’s crusade to rid the world of spammers/scammers/malware/botnets. My hostname was one of the ones that was nixed by Microsoft’s overly broad court order. I’m sure MSFT could have just worked with No-IPs abuse team and taken down only the offending domains - but I’m not going to get into rant about that.
So, I did what any self-respecting hacker does in this situation and decided to roll my own. I was already familiar with Amazon’s Route53 service so I figured why not? They have a nice REST API with granular access controls, as well as a command-line client that makes interacting with said API a breeze.Read the rest →
I recently got a new MacBook Pro as my new work machine. As someone who’s never used a Mac for any serious length of time, it was quite a culture shock.Read the rest →
Length: 491 words or 3 min Tags: irl
The Sender Policy Framework (SPF) is an attempt to mitigate certain types of spam - specifically spam where the sender masquerades as a different sender. Technically, you can put whatever you want in the
From: header of an email message, so you can pretend to be sending emails from
facebook.com simply by putting something like
From: firstname.lastname@example.org in your email’s headers.
Heartbleed is a bug in the OpenSSL library that was publicly disclosed on April 7th, 2014 by an internet security firm called Codenomicon. With OpenSSL being the defacto SSL library in both the Apache and nginx webservers, that potentially exposes about two thirds of the internet. If we exclude the websites that don’t use SSL at all, we are left with a nice round number: half a million.Read the rest →
To connect to a box on your network that is running Oracle Database, you will first need to allow connections to Oracle through your firewall.
If you’re running CentOS, RHEL, Fedora or any other Linux variant that uses
iptables, use the following commands to create a firewall exception (Assuming you’re running your listener on port 1521 - check with
sudo lsnrctl status):
sudo iptables -I INPUT -p tcp --dport 1521 -j ACCEPT
If you’re running a high-availability system of some kind, chances are you are into some sort of Load Balancing. If you happen to be writing a Java app, and happen to be using Apache Tomcat as your servlet container, then this tip is for you.
I had a system which needed to be HTTPS-only but also have the SSL terminated at the load balancer. Naturally, I forwarded the HTTP and HTTPS ports on my Elastic Load Balancer and had my application configured to redirect any insecure connections to an SSL connection. I started having a couple of strange issues where occasionally it would leave the connection on HTTP when it should have been redirecting.
My setup was basically:
HTTP (80) -----> ELB -----> Tomcat (8080) HTTPS (443) -----> ELB -----> Tomcat (8080)
Turned out, I needed to set a couple of extra options in my Tomcat HTTP Connector section (find it in
server.xml). This was the combination of options that did it for me:
From time to time, I have been known to accidentally type my password into a “username” prompt in a
bash shell. In that situation, the password you entered is now a part of your
~/.bash_history file forever, unless you truncate or redact it.