No Picture

How to do a HTTP POST with Curl

This page proves there are people out there who forget about the same things I forget. Here’s the POST I wanted to run today. curl -d “platform=CHANNEL&processor_target=CERT&charge_type=PING” http://app01.qa.paygateway.com:31080/Quicksilver/


No Picture

Cisco ASA/PIX Bandwidth limiting

Today, I got a chance to setup some bandwidth limiting on our Cisco ASA Firewall. The goal was to choke the speed of traffic going to our backup server to 250Mb/s. As our backup traffic goes through a firewall here’s…



How to allow ICMP through your Cisco ASA/PIX firewall

ICMP packets are not stateful, how does the ASA handle them by default? Internet Control Message Protocol (ICMP) pings and traceroute on the PIX Firewall are handled differently based on the version of PIX and ASA code. Inbound ICMP through…


No Picture

Most useful commands used in TOP

Top is amongst the most comprehensive and informative process display command in Linux. There’s no reason for a seasoned Linux sysadmin like myself not to know it! Top can display all the information you need to know about processes and…



Troubleshooting Cisco PIX/ASA site to site IPsec VPN

A site to site IPsec VPN consists of two phases; Phase 1 – IKE exchange and Phase2 – Establishing the ipsec tunnels. It is important to figure out which part of the negotiation the VPN is failing at. However, before…



No Picture

Useful ways to use the Linux “find” command

In my Linux life, I find myself trying to search for files quite frequently. All distributions comes with a very handy command called ‘locate’ which helps you search for the file. What it does is Linux keeps an index and…


No Picture

First Post

I find I frequently learn something, somethings that I’ve done once or twice or a dozen times and I eventually forget about it. This is why I’m starting this blog. I want to record down to excruciating detail what I’ve…