Author Archives: (zaphinath)
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 […]
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. […]
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 […]
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 […]
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 […]
IPC – Linux Communication Signals
IPC – Inter-process Communication – is the way running programs can communicate with each other in a Linux system when there are conflicts or user has need to interrupt the running program. The following are a list of the various signals that the Linux Kernel handles. Most of us are familiar with several of them […]
Computer Systems – Going down the rabbit hole.
If you are looking to understand linux and how the overal picture works with the kernel down to the hardware a great book to use is Computer Systems: A Programer’s Perspective. The thing I really liked about this book is it first walks you through how the processor is set up and gives a great […]
HTTP Error – 500 Internal Server Error
Description The 500 Internal Server Error is a “catch-all” server error and the server cannot be more specific about the nature of the error. The causes for a 500 error can be any number of things and about 9/10 times the error comes from a code error, which means that the problem is not necessarily […]
All You Need to Know About php.ini
Description Most servers with php installed on them come with default settings that are used server wide. However, sometimes a program will require these php settings to be changed and instead of changing the settings for the entire server a person can overwrite the default settings for just a particular location (or domain). This is […]
HTTP Error – 404 Not Found
Description A 404 Not Found means the address cannot find a file or folder on the webhosting server or the server has not found a file matching the given URI. Troubleshooting to Fix Check the spelling for the file and URL. After the base url all the links are case sensitive according to the casing […]