I've heard that this was the default for these routers. I have a RB951G-2HnD using NAT, and, although I patched it long ago, as far as I can tell the relevant

I've heard that this was the default for these routers. I have a RB951G-2HnD using NAT, and, although I patched it long ago, as far as I can tell the relevant ports were never open on the WAN side, nor any ports that I haven't manually forwarded. Was that not the default?