Chuck Kollars wrote:

> 
> As another example, what I use is documented at 
> http://www.ckollars.org/shaping.html
> 

Good writeup, Chuck. I've taken the liberty of adding a link to it from
the Shorewall Traffic Shaping page.

A couple of comments, though:

a) It is doubtful that all of the UDP ports that you are specifying are
needed (20, 21, and 110) come to immediately to mind.

b) TCP port 20 is only a destination port for ACK packets. FTP servers
bind to that port for active mode data connections.

c) Your rules assume that no servers are running behind the Shorewall
box since only requests with the listed DEST ports are being marked.
Responses from local servers have the reserved ports as their SOURCE
port. So, for example, outgoing responses from a web server have SOURCE
port 80 (HTTP) or 443 (HTTPS).

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