Hi all. Sorry for asking such a simple question, but if I had a LAN of machines with private IP addresses (192.168.0.x), a cable connection, and a Linux machine doing NAT using iptables, what would be the best way of going about setting bandwidth limits for certain machines on the LAN? I assume that packets would have to be marked as they were forwarded by netfilter (the iptables forwarding table) based on their source/destination inside the LAN and then a set of class based bandwidth management rules as per section 9 of the Advanced Routing HOWTO. Is this the correct approach? Also, this is probably a bit obscure, but is it possible to discriminate between the type of data being carried by a protocol when doing bandwidth management? For example, giving HTML files transferred over http a larger share of bandwidth than, say, MP3 files over the same protocol? Obviously this would involve sending all traffic through some kind of proxy which would then determine which connections were carrying what kind of file. This probably sounds quite absurd, but is it something that has ever been considered? Thanks for your time. Great document.
