Lately, I’ve been implementing a solution to make SSH connections more secure and manageable (i.e., getting away from password authentication). A couple of benefits public-key authentication has over the default password authentication is: Memorize only the passphrase of your private key rather than possibly dozens of username/password combinations for remote hosts. A password sent across the network, even protected by an SSH secure channel, can be captured when it arrives on the remote host if that host has been compromised....

I recently had to configure Inter-VLAN routing at a client’s site. I don’t have to perform this task on a regular basis, so I figured I would make a post of a sample implementation for future reference. Ingredients used for this post: Cisco 2811 Router Cisco Catalyst 3560 Cisco Catalyst 2950 Steps Configure the Corp router. enable conf t int fa 0/1 description Link_to_L3SW ip address 172.17.17.9 255.255.255.252 no shut end copy run start Configure the Cisco Catalyst 3560 switch....

I routinely google this task whenever I have to install or upgrade the VMware Tools on a Linux VM guest. I figure I would make a post for future reference. Ingredients used for this post: VMware ESX Server 4.0 Ubuntu Server 9.10 Steps Use the vSphere Client to connect to a vCenter Server or directly to an ESX host. Right-click the virtual machine and select Open Console. Log into Ubuntu with an administrative account....

This post is a guide to configure a Cisco Adaptive Security Appliance (ASA) device to perform remote access SSL VPN with the stand-alone Cisco AnyConnect VPN client. I followed a few tutorials on the web (including a couple of examples from the Cisco website), but I failed to implement a complete solution. The following recipe has been thoroughly tested and verified. Ingredients used for this post: Cisco 5500 Series ASA with software version 8....

This post is a guide on how to create a TFTP server for Cisco device configuration backups on Ubuntu 8.10. 1. Install atftpd. sudo apt-get install atftpd 2. Configure atftpd as a separate server and modify the tftpboot location. Modify the file with a text editor. sudo vim /etc/default/atftpd Set the configuration. USE_INETD=true -> USE_INETD=false /var/lib/tftpboot -> /srv/tftpboot Save and exit. 3. Initialize the new configuration. sudo invoke-rc.d atftpd start 4....

I thought I would submit my solution for the FizzBuzz test. I’ve used PowerShell and VBScript for the solution since the majority of my dev work is Windows scripting. FizzBuzz for PowerShell: for ($i = 1; $i -le 100; $i++) { if (($i % 3 -eq 0) -and ($i % 5 -eq 0)) { Write-Host "FizzBuzz" } elseif ($i % 3 -eq 0) { Write-Host "Fizz" } elseif ($i % 5 -eq 0) { Write-Host "Buzz" } else { $i } } … and VBScript...