I have searched online but can not find a way to block all incoming traffic on a port in OS X.

Thats all incoming traffic ... the router i am setting up does not have these options so i wanted to try doing this on a machine by machine basis.

The machines are running 10.4.10

any ideas would be great

best

Stuart

You've tried the OS X Firewall feature in the Sharing preference pane?

Hi Ender,

It has been quite interesting trying to do this.

The system preferences pane allows opening ports ... but if the browser requests for the port to open in order to access data via port 80 it opens.

I want it to stay closed.

The system preferences pane does not seem to offer this.

Stuart,

On OS-X you could look at using a program called Little Snitch.

http://www.obdev.at/products/littlesnitch/index.html

I mainly use it to monitor which applications are trying to make external connections but you can set it to block specific ports.

Steve