FTPoverEmail Beta v1.00

I made a few more edits to FTPoverEmail. I got the SSH functionality working and fixed a couple of bugs for this next version. I’ve started studying for CCDP so my work on it has tailed off a fair amount. Here’s the next version with the bug fixes and SSH functionality. I called this one […]

FTPoverEmail Alpha

Overview Ever find yourself on a computer where you only have access to e-mail? That’s where FTPoverEmail shines. I frequently find myself in situations where I only have access to e-mail, but I still want to interact with my home server in an FTP-like fashion. You may be in a hotel business center or you […]

How to Setup OpenVPN on Ubuntu 14.04

Below is a setup for OpenVPN on Ubuntu 14.04. With some modifications, it should work on most flavors of Linux ┬áMuch of the setup came from https://help.ubuntu.com/14.04/serverguide/openvpn.html with a couple of modifications to work out any bugs I ran across. Keep in mind this is for a routed VPN. A good explanation of routed vs […]

Create DHCP Server in VyOS

set service dhcp-server shared-network-name <NAME-OF-NETWORK> subnet <SUBNET-ADDR/MASK> start <IP-ADDRESS-OF-START>stop <IP-ADDRESS-OF-STOP> You may want to set up static leases which you can do by using set service dhcp-server shared-network-name <NAME-OF-NETWORK> subnet <SUBNET-ADDR/MASK> static-mapping <NAME-OF-RULE> mac-address <MAC-ADDRESS-OF-MACHINE> set service dhcp-server shared-network-name <NAME-OF-NETWORK> subnet <SUBNET-ADDR/MASK> static-mapping <NAME-OF-RULE [same as above]> ip-address <IP-ADDRESS-OF-MACHINE> You can also set the default […]

Checking Open Ports with Ruby

Below is the code for listing open ports on a windows box via Ruby. This line first lists all active connections via netstat. The find “LISTENING” section lists those ports in a listening state. The “find /V” looks for any line without “0.0.0.0”. This last part is important because many times Windows lists connections in […]

Integer Overflow in Hearthstone

Integer Overflow Illustrated in Hearthstone How having over 2 billion health destroys the monster A friend recently showed me this video and asked what happened and I thought it was a perfect illustration of a classic problem in computer science – the integer overflow. At 8:25 the monster has a health of 1073744896. The player […]

Is the XCOM PRNG Broken?

So I sat down to play XCOM the other day. Great game for the most part. However, there were a couple of sequences where I would fire with 3 different soldiers at 90+% chance to hit and I would miss all three times. Well, when you do ┬áthe math on that ~.1^3 chance for that […]

CCNP Route

Passed CCNP Route! If you’re studying for CCNP Route I strongly recommend finding a review guide and ditching the official book. The official book by Odem was a great reference, but it just had far too much extraneous information. While I do love learning for learning’s sake, at the end of the day you still […]