Re: Please help with NAT

[Gergo Szakal <bastyaelvtars@xxxxxxxxx>]

Erik Wikström wrote:
> Never used dummynet myself but I seem to recall that ALTQ does not 
> provide the same functionality as dummynet. As I understand ALTQ can be 
> used to prioritize some packages over others (by using different queues 
> and rules that places the packages in the right queue) while dummynet 
> supports more advanced stuff like simulating slow/unreliable networks. 
> Someone who knows, please correct me if I'm wrong.

There is PRIQ whose purpose is to prioeitize one packet over the other, 
indeed. It makes the system process higher-priority traffic first.
CBQ creates classes in a root queue like this:
root: 100Mbit	- class http 20Mbit (packets going to port 80, 443)
		- class mail 20Mbit (packets going to 110, 25, 995 etc.)
		-class other 60Mbit

Therefore, 20Mbit will be reserved for either mail and http.

HTH