Well, I came here with a strange problem. Let's have the following topology. Equipment A (IPAddr 192.168.1.x) - Interface 1 Linux Router (192.168.1.1)-Interface 2 Linux Router (192.168.2.1) - Equipment B (IPAddr 192.168.2.x) Quite simple, isn't it? What I want... I want a program onto the Linux Router which can modify the values of ping and packet loss which are obtained between equipments A and B. I want to ... shuffle the packets, to make, for example, that always packets 5,6 and 7 from a raw of 8 packets sent from device A to B to reach device B after the arrival of packet 8, etc. Whats the point? I want to inform the customers which are using those equipments/applications that if the ping is increasing, let's say, over 180 ms, or, if the packet loss is increased over 30% or the jitter, or... they will loose connectivity/they will experience [...] problems. And, in order for me to have this informations, I have to emulate diferent aspects of a real network. So... how can I do this? Any ideas? BTW - it's not a matter of bandwidth here... Bandwidth used can be something between 64k and 256k, for example, but I am not interested in increasing trafic over the interfaces in order to emulate network losses/problems. BRGS, Gabriel Corcodel Alsys Data SRL Bucuresti Network, HP Netservers & HP Networking solutions manager _______________________________________________ LARTC mailing list / LARTC@xxxxxxxxxxxxxxx http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/