SSH Error: "ssh_exchange_identification: Connection closed by remote host"

Fixing up an SSH login error after moving to a new ISP. "ssh_exchange_identification: Connection closed by remote host" is caused by the lack of a reverse DNS entry.

Monitoring a Broadband Router

Just been asked this question by an ex-colleague so I thought it would be good to do a write up. How do I monitor my broadband router? There are a number of measurements that you can do to see the health of your router. External Monitoring Firstly, you can measure whether the outside world can “see” your router. This does mean that you have to allow “pings” from the Internet which does slightly reduce your router security and so this feature is often turned off by default.

Bridged networking in OpenSUSE 10.3 & 11.0 (For VirtualBox)

I prefer to use VirtualBox rather than VMware as it seems to be rather faster and less resource hungry than VMware Server (the only free version of VMware with a GUI). Also VirtualBox seems to have better Linux host support (sound, etc.). However, there is one thing that VMware is better at – setting up the guest network on the same network as the host. Under VirtualBox this is called “Host Interface Networking” and, with a Linux host anyway, is a right royal pain to set up.