SOLVED
The following works !
I guess one of my others rules was blocking
table ip Tip {
chain prerouting {
type nat hook prerouting priority -100; policy accept;
ip daddr 192.168.y.2 log prefix "forwarded " dnat to 192.168.y.3
}
chain postrouting {
type nat hook postrouting priority 100; policy accept;
masquerade
}
chain INPUT {
type filter hook input priority filter; policy accept;
}
chain FORWARD {
type filter hook forward priority filter; policy accept;
}
chain OUTPUT {
type filter hook output priority filter; policy accept;
}
}