High Speed Data Transfer
I recently had the opportunity to present a brief overview of some of the work that BioTeam has been doing with the New York Genome Center. The format was a “webinar,” sponsored by Aspera and hosted by Bio-IT World. I spoke briefly about the data motion needs of the center. The most interesting piece to me […]
Setting up LOM on an Apple XServe from the command line
Apple provides a GUI for setting up the IP address and authentication information on the LOM. The problem, for me, with using a GUI for something like this is that it’s nearly impossible to script and automate. When I’m setting up a cluster of even a dozen nodes, going through a remote desktop to a GUI becomes intolerable in a hurry. This post shares my recipe for getting the LOM ports on the network and accessible, using only the command line.
SSH tunnels part 3: Reverse tunnels
The problem addressed here is the same as the previous two, except that the remote administrator won’t open up *any* ports in their firewall. Machines on the customer’s network can connect out onto the internet, but there is no direct way to connect to them from out here. This post describes how to set up a pair of tunnels that meet in the middle, allowing me access to machines that don’t even have a public IP address.
SSH Tunnels – part 2
In a previous post I described how and why one might set up a very simple ssh tunnel in order to access a web server or a remote desktop server on a machine with a restrictive firewall. This post goes one step deeper, showing how to chain tunnels together.
SSH Tunnels For Beginners
A basic introduction to ssh tunnels: As a first puzzle, assume that a friendly administrator gave me an ssh account on her web server. However, her organization’s security scheme only allows me to get to port 22. I can ssh in, but I can’t really debug some problem with the web browser because port 80 is still blocked. Assume as well that we’ve already called up the network administrator, who offered to think about it – laughed maniacally – and hung up on us.
Binding Apple's Open Directory from the Command Line
Here is a trick I use a couple of times a month to get finicky compute nodes in a Apple compute clusters to correctly bind to their LDAP / Open Directory master. This started working as of OS X 10.4, and to my knowledge it still works as of OS X 10.6.1. Bioteam uses a […]
