You'll need to define "repeated inbound traffic requests" a bit better most likely.
Any publicly routable IP on the internet will regularly get bots, crawlers, script kiddies etc looking for open systems. They'll try all the usual ports, usernames/passwords etc.
A huge majority of home internet connections simply use a NAT type device which in effect is also a basic firewall (yes, lots of people will say it's not a firewall) as it won't allow any connections in unless something like a port forward is created to an internal device or an internal device uses UPnP to create one.
So just make sure nothing is open on the internet side of the router, have decent virus/malware scanners on PCs and you should be pretty right. Make sure any web interfaces to the router are only accessible from the inside or have secure passwords and preferably secure (HTTPS/SSL type) connections
#40104192 120Gb (no longer in my E36 M3, won't fit the E46 M3)