Setting up ssh tunnel in Putty

Question

I have instructions for setting up a proxy tunnel to a work computer behind a firewall. The setup is:

                        |
[home]--------[outside]-|-[inside]
                        |

The instructions are, from home:

1. ssh -N -L 7000:inside:22 outside
2. ssh -D 9999 -p 7000 localhost
3. Setup a proxy for port 9999 on localhost

I should then be able to appear to the world as though I'm on [inside].

If I was on a mac or linux machine I assume I would do the first two steps in order at a terminal. In windows, I can't just open up an ssh terminal.

The putty tunnel configuration screen looks like this:

I have two questions:

1. What would be the right settings for step 1?
2. Is the 2nd step done in Putty as well, or from the shell connection in step 1?

Edit: This is what the main Putty screen looks like:

Localhost:7000

Answer 1

So to answer your second question first, yes, both steps are done from PuTTY.

First you need to setup a tunnel to outside using the "Local" radio button with the "Source Port" set to 7000 and the "Destination" set to inside:22.

Next, you would start another instance of PuTTY and use localhost:7000 as the host. On the tunnels tab, select the "Dynamic" radio button and set the "Source Port" to 9999.

Then, as before, configure your proxy to point to localhost:9999.