are the directors firewalled?

Hello,

In the next 24 hours, I will attempt to set up 4
computers in a high availability, load balancing
configuration, as here:

http://www.ultramonkey.org/3/topologies/ha-lb-eg.html#real-servers

For the directors, I will either use ubuntu 6.06 LTS
or debian sarge.  I have ubuntu installed on all 4
boxes.  I am planning on trying debian sarge again;
installation did not go well when I tried it about 10
days ago, but this time I will use older (1998
vintage) hardware.  

The real severs will be web servers running Apache2. 
My router will be a Smoothwall 3 box.

I note from the diagram that the directors are exposed
to the internet. 

For optimal security, I think each director should
have an iptables firewall running that will allow
access to the desired ports and block access to all
others.

Does ultramonkey firewall the directors?

Thanks,

Rick Graves

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