Thank you Luciano, <br>you were right, my problem was a iptables problem.<br>I am using RHAS3 because that's the system we use. This doen't depends on me. On my computer, I tried drbd with debian and I didn't have any problem. I think I will suggest an update of that old RHAS. Thanks once more.
<br clear="all"><br>-- <br>ADAMOU SAIDOU Nacer<br>Software engineering student<br>Phone (237)7186204/(237)2210569