Monthly Archives: August 2006

Slow SSH connections on Mac OS X

So, I have to spend quite a lot of time remotely logged into a unix server by SSH at the moment. Luckily Mac OS X comes with a nice SSH client already installed but I have been having problems with it taking forever (well, up to a minute) to connect which finally got annoying enough to fix this morning.

The first thing I did was to enable debug messages with the -v parameter.

dave$ ssh -v dave@192.168.0.200

When I ran that, the long pause came just before this error message:

debug1: An invalid name was supplied
Cannot determine realm for numeric host address

A few quick googles and I had the solution, add a DNS lookup for the IP address and the speed issue goes away leaving you with a fast and responsive SSH connection process!

To add the DNS lookup, simply edit the /etc/hosts file (you will need to sudo this or type your password when it is saved) and add a line something like this to the bottom:

192.168.0.200 myunixserver

Then you should be able to connect quickly using either the IP address or the new host name you assigned.

AFK again

Again sorry for the extended delay on blogging, I will let NetNewsWire explain the predictable answer to why I haven’t blogged for a while!

You know it’s not good when you get to that many unread posts :) Anyway, hang tight… There is a (short) post coming in about 5 minutes.