network communication

Adding and Troubleshooting Static Routes on Red Hat based Linux Distributions

Adding static routes in Linux can be troublesome, but also absolutely necessary depending on your network configuration. I call static routes troublesome because they can often be the cause of long troubleshooting sessions wondering why one server can't connect to another. This is especially true when dealing with teams that may not fully understand or know the remote servers IP configuration. The Default Route Linux, like any other OS has a routing table that determines what is the next hop for every packet.

Mitigating DoS Attacks with a null (or Blackhole) Route on Linux

In a world where the Anonymous group is petitioning the US Government to make DDoS attacks a legal means of protest; For internet facing systems the threat of Denial of Service attacks are very real. The cold harsh reality of DoS attacks are that there is no way to stop them. While there are services out there that are designed to take the brunt of the attack for you these costs a significant amount of money (update: CloudFlare seems pretty decent).