Tech Problems

undefined function ImageCreate()

techproblemlog — Fri, 21 Jan 2011 22:35:27 +0000

This is caused by not having the GD module installed to php.

yum install php-gd

sudo apt-get install php5-gd

iptables LAMP stack configuration

techproblemlog — Fri, 21 Jan 2011 18:33:37 +0000

This a working iptables configuration for your usual LAMP install. This is not necessarily a good configuration, but it is a start.

*filter

# Dropping incoming connections that don't have explecit rules bellow
:INPUT DROP [68:4456]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [1628:151823]

# Allow established connections for both public and private connections
-A INPUT -i eth0 -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -i eth1 -m state --state RELATED,ESTABLISHED -j ACCEPT

# Opening ports wide open
-A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 443 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 21 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 3306 -j ACCEPT
-A INPUT -p tcp -m tcp --dport 65525:65535 -j ACCEPT

# Opening a port to a specific IP
-A INPUT -p tcp -m tcp --dport 10000 -s 192.168.1.1 -j ACCEPT

# Opening a port to a range of IPs
-A INPUT -p tcp -m tcp --dport 20000 -s 192.168.00/24 -j ACCEPT

# Commmiting the rules to the firewall
COMMIT

Find product key

techproblemlog — Fri, 01 Aug 2008 18:03:09 +0000

The best free program i found to find a product key for office, windows, macromedia, adobe and pretty much all programs installed on your computer was Belarc Advisor

Retreive CS3 key after install

techproblemlog — Fri, 01 Aug 2008 17:08:27 +0000

Simple answer: This is not possible. You must call Adobe.

This was a huge pain when you have multiple computers running with different licenses and doing a company wide computer upgrade and not having the keys. CS3 activates with Adobe and then removes the key you entered from the computer. You must call Adobe to get a new key.

To audit the software you must you a product ID.

What is Asterisk?

techproblemlog — Fri, 01 Aug 2008 13:23:11 +0000

Asterisk is an open-source PBX. It is made for Linux but has been ported to both Windows and Apple. To put it simply it is a voice over IP phone system. It connects to VOIP enabled phones and adapters, and connects them to the public telephone system. The reason so many people use it and love it is its features and cost. The cost of an average phone system these days range from 1,000-10,000 before the cost of the phones themselves. The Asterisk software is free and can run and a wide range of computers. The feature list is huge and rivals all proprietary phone systems. To top all this off it is fully customizable and any one can tear it apart to do what they want it to do.

0x0000007b Installing Windows XP Dell

techproblemlog — Thu, 31 Jul 2008 17:19:30 +0000

Downgrading from Windows Vista to Windows XP and getting the 0x0000007b blue screen on reinstall.

You must set the SATA operation setting from AHCI to ATA in BIOS when installing Windows XP.

cisvc.exe process slowing down computer

techproblemlog — Thu, 31 Jul 2008 17:10:59 +0000

The cisvc.exe is a windows process that runs to manage memory usage of the windows indexing service. This process is known to have issues causing the processor to run at 50% or higher at all times.

The windows indexing service stores all file information in a database to make searching and browsing files quicker.

The quick and easy fix is to disable this service.

1. Start->Control Panel->Administrative Tools->Services

2. Right Click on Indexing service->Properties

3. Change Startup Type to Disabled and Stop the service.

I have not noticed any speed difference with the service disabled.