On: Router Security

[BenjiWiebe]

How much is exposed? How much attack surface is Internet accessible on, say, a 5 year old netgear router? I guess I think it might be quite low.

[yjftsjthsd-h → BenjiWiebe]

If you've port scanned your public IP(s) and there are zero open ports, then you only have to worry about bugs in the TCP/IP stack, services listening on UDP, and intentional backdoors (which shouldn't happen but keep popping up). If there are exposed ports, then there's even more attack surface.

Edit: actually I forgot the like of UPnP so that's not exhaustive.