Thanks for that, the 0.0.0.0/0 does seem to be fine for the rule-set, however my problem seems to be with teh proxy-arp section which I have:
proxy-arp {
interface ge-0/0/0.0 {
address {
0.0.0.0/0;
}
}
and when I try to comit I get the following error:
[edit security nat proxy-arp interface ge-0/0/0.0]
'address 0.0.0.0/0'
IP address 0.0.0.0 is invalid
error: configuration check-out failed