gistfile1.txt

This works...

    set forwarded {
        type ipv4_addr
        flags dynamic,timeout
        timeout 1h
    }

	chain FORWARD {
		type filter hook forward priority filter
        policy accept

        update @forwarded { ip saddr counter } counter
    }

... but this does NOT work

    set forwarded {
        type ipv4_addr
        flags dynamic
    }

	chain FORWARD {
		type filter hook forward priority filter
        policy accept

        update @forwarded { ip saddr counter } counter
    }