Thank You for Your time and answer, Peter E.: > My network has masquerading. Thank You, it did the trick. But question still remains w/ me, Why in another situation, I had simply to specify in iptables (on host2, having only two NICs - not ppp) to forward packets from host1 to the world - w/o masquerading, and in this case (NIC and ppp) I had to make masquerade?