Hi, Eduardo Spremolla schrieb: > I suppose you have a firewall that allow outgoing traffic on port 21 ? > or is incoming? > > Any way you can't tell if the traffic on port 21 if ftp , telnet or http > without looking a hi layers protos. Don't know of any support for that > in netfilter. May be you need to setup a transparent proxy. > May be this is of use: http://l7-filter.sourceforge.net/L7-HOWTO-Netfilter Have a nice time, Joerg
