Author Archives: Derek Carr (zaphinath)
Using NginX Route to Plex Server Behind Firewall.
Description If you have a router and want to limit access from the outside world to all the computers inside your home, then you will probably want to set up a server in a DMZ or forward specific ports to it. This open server can then route traffic to anything behind the firewall for you […]
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Node.js Webapp In a Docker Image – MEAN
Description Node js applications are great for proof of concepts and getting apps made in a short amount of time. Running them inside a docker container is a great security blanket and lets applications be versioned much like software version control. This is a quick code snippet of a nodejs server using express. This is […]
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Organizing workbench tools
Overview I have been accumulating a few tools over the years and now is the time to start organizing them. I didn’t like the idea of loose hooks or not knowing where the tools belong, however, with some cheap black paper and locking hooks I have a solution. Supplies Two 2×4 white pegboards ($6-8) Three […]
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Multiple environments through GEB
I’ve recently been experimenting with GEB, which is a selenium framework that uses the groovy language. One of first challenges I encountered was trying to switch between multiple environments, instances, subdomains, or base urls. GEB uses a config file called GebConfig.groovy that is a standard groovy configuration file. This file is read by the ConfigSlurper […]
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VGA Synchronization Driver for FPGA
Description In order to use the VGA connection on an FPGA there needs to be a vga timer that can change the pixels as it goes across the screen. I won’t go into detail here about VGA standards, or how the horizontal and vertical refreshes work, but rather just give some example VHDL code that […]
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Connecting to an API WSDL through Java REST
Description Java seems to have a pretty decent library for dealing with WSDL soap transactions, however there doesn’t seem to be any great library out there for dealing with rest. The solution is to using java’s built httpconnection library to post the information to the appropriate url and wait for a response. For REST protocol […]
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Project Organization
I have put this off for too long now – I am finally collecting all my projects, both personal and school related, and putting them up on github. Zaphinath’s GitHub repository. I have been using SVN and git for sometime on my own boxes. There are things I like about both and things I dislike. […]
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PS2 Receiver Module for VHDL
Description I have several VHDL modules that have been coded to use with the Spartan 3E. My next couple of posts will have various modules followed by a top level design that connects them all together. This module is for a keyboard receiver. Keyboards communicate two ways. They transmit the key strokes in a 11 […]
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Using Asterisk as Sip Server with Google Voice
Description I have wanted for some time to buy a sip phone to plug directly into my network and use it with my google voice account, thus giving me a free house phone with unlimited minutes to all of north america (or wherever google decides). To do this I installed Asterisk 11.0 on my server […]
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Custom Filter for Exim Through Fail2ban
Description I have noticed a lot of unsolicited smtp traffic on my box and I have started taking anti-spam measures to remove unauthorized usage of mail on my server. I use exim to transport and route mail. Exim is great and there are a lot of custom tweaks that can be done with Exim’s ACLs […]