# dynamic interfaces need not exist at load-time, but names must start
# with a letter. catches common macro typo cases of ($ext_ip) vs. ($ext_if)

match out on lo0 from any to any nat-to (lo0)
match out on lo0 from any to any nat-to (lo0:0)
match out on lo0 from any to any nat-to (nonexistent0)
match out on lo0 from any to any nat-to (nonexistent0:0)
match out on lo0 from any to any nat-to (10.1.2.3)
match out on lo0 from any to any nat-to (10.1.2.3:0)