Western Digital HDD GLFS and HLFS

WD GLFS and HLFS

One of our clients had a WD Digital Velociraptor that was failing due to bad sectors. It was a 300GB WD Velociraptor GLFS type. The guys from warranty told us that they only have 300 GB Velociraptors HLFS type. The performance specs are the same, the only difference is that the HLFS has the SATA connectors on it’s heatsink, in order to allow the HDD to be placed in 3.5 inch bays, and use a standard 3.5 inch backplane.
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Windows XP Picture and Fax Viewer problem

When using Windows XP, i encountered a problem with Windows Picture and Fax Viewer. One day it just started freezing when viewing the pictures on the desktop. This was only happening when viewing images on the desktop, other folders were OK. Continue reading

VMWare ESXi 5.0 on IBM x3250

My IBM x3250 (4364-K1G) server just suffered some changes because there was a problem with VMWare ESXi 4.1 Update 1 and the RAID 1 setup. No matter what HDD’s i used i couldn’t install ESXi 4.1 Update 1.
There were write errors during ESXi 4.1 install process. Continue reading

Password protect apache directory with htaccess

Protect web folder using Apache’s .htaccess method.

Create a new htaccess file in the folder you want to be protected. Name it .htaccess Continue reading

Mail ports protocols : POP, IMAP, SMTP

Email protocols explained :

For those who want a simple explanation for e-mail ports and protocols here it is :

PORT 25 TCP : SMTP
PORT 110 TCP : POP3
Port 143 TCP : IMAP
Port 465 TCP : SMTPS (SSL)
Port 587 TCP : alternate SMTP, sometimes used if your ISP blocks port 25
Port 993 TCP : IMAPS (SSL)
Port 995 TCP : POP3S / POP3 TLS/SSL

TLS can be used on any port.
TLS it’s backwards compatible with older versions of SSL.
TLS it’s open stadandard, and it’s the succesor of SSL.

SSL has it’s own ports : 465 or 993.

Examples of use :

Gmail.com :
SMTP 465 SSL / TLS
IMAP 993 SSL / TLS

IBM x3250 server

Hardware equipment upgrade in progress !
Because the requirements have changed and i am now hosting a few domains, i decided to buy a new server.
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Postfix time log date and local time

Looking through the logs of one of my mail servers i noticed a time difference in the mail log.
If you look at the line numbers 6,7,11 and 13 you will see a 3 hour difference.
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