Site to Site VPN between a Cisco Router and Linux Server

I am working on a project to implement a site-to-site VPN between a Linux box and a Cisco router. At first it might seem an easy question but its not that easy because of some requirements and compatibility issues and I working hard on it to figure it out. Currently I am looking into the followings:

• OpenVPN
• Openswan (Seems to be the right choice!)
  
• StrongSwan
• Frees/WAN

There are online resources explaining how to a establish a site to site VPN between a linux and a Cisco PIX firewall or Cisco VPN Concentrator but not for cisco IOS based routers!

Umount: Device is Busy

I don’t know how many times this happened for you but it its common that when we initiate the umount [mount point] we keep receiving the "umount: [mount point] : device is busy" message.
This means that a process is using that mount point and the quickest way to find out which process or user is using it, is to use the fuser command and then if we are sure that no one is working on that mount point we can kill the process.
fuser -u [mount point] tells which user is using it and fuser -k [mount point] kills the process which is using that mount point!
Watch out when you kill the process! This may result in loosing or corrupting data if someone else is working on that directory!
check this for further detail about fuser:
Fuser (UNIX)

Server response: No properly formed ip addresses

The other day I was looking into a problem on one of our hosting servers running Parallels Plesk 8.6. The server's license had just entered his grace period and retrieving the key resulted an error message as "Server response: No properly formed ip addresses" which seemed very odd! At first I thought maybe its a firewall issue but I was wrong. For me restarting the httpsd service resolved the issue (/usr/local/psa/admin/bin/httpsdctl restart) but I couldn't find out the root cause.

Data Center Cooling

I have taken a Data Center design course recently and I am learning some great new stuff. This course has brought a lot of important things to my attention which I couldn't see before while they were in front of my eyes! Maybe that's because I am not directly responsible for the mechanical and electrical things in our data center and I just care about the servers, the network and services on our servers. This course is about the physical infrastructure which includes power, cooling, physical structure, cabling and etc. It touches on different topics but does not go much into the details so I have started googling about the topics. APC has great documents and since I am very keen on the cooling system topic I recommend the following:

• Air Distribution Architecture Options for Mission Critical Facilities
• Explanation of Cooling and Air Conditioning Terminology for IT Pros
• Ten Steps to Solving Cooling Problems
• The Different Types of Air Conditioning Equipment for IT Environments

CAT-5

Humor from packetlife.net:

The things we do and the things we like to do!

There are "things we do" and things "we like to do"!
For "things we do" we have always time but for things "we like to do" we never find the time!!! Sounds ridiculous but this is how it works for us!

Sacrifices must be made!

In the last three or four weeks bad things happened to me all at the same time which resulted in some conflicts at work loosing my passion towards my work environment. In this fight someone close to me which I have trust in him and I believe he has the the best intention for my career development, raised a fundamental question and that was were I wanted to be in 10 years? Having a normal life, a car, a home or being someone that affects the world around him?
I was angry at the time and I didn't answer him but to be honest with myself, I like to be the one that affects the world around him!
To be that, a lot of sacrifices must be made!!!