http://www.tldp.org/HOWTO/Bandwidth-Limiting-HOWTO/faq.html#AEN317
5.6. Can I limit my own FTP or WWW server in a manner similar it is shown in the question above?
Generally you can, but usually these servers have got their own bandwidth limiting configurations, so you will probably want to look into their documentation.
2.2.x Kernels
/sbin/ipchains -A input -s 192.168.1.1/24 -d ! 192.168.1.1 25 -p TCP -j REDIRECT 25
2.4.x Kernels
/sbin/iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 25 -j REDIRECT --to-port 25
Don't forget to add a proper line to your initializing scripts.
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Причем тут 25-й порт, если речь идет о FTP (20,21) и http (80) протоколах?
И какой толк в перенаправлении с 25-го порта на свой 25-й?
