Mr. U is right on this one. The best control is a parent. UDP port probes are automated port scanners. The default settings on most routers block the common ports. The good thing about a router vs. a software firewall is it does not answer meaning a request sent to a software router is interpreted then denied where a router doesn't listen on the port at all. That means the automated port scanner moves on assuming its a fax machine or whatever and does not report to the human hacker you are even there. IMHO there is no replacement for a hardware firewall. The very inexpensive Linksys router is really a mini cisco router with a good and easy interface. Netgear and D-link are also good products along with Hawking.
Parental controls are a tough one. The software makers of this stuff get paid to put sites on the block list, they also charge to take sites off. They block way to much. For example, if your kid has to do a paper on Breast Cancer most sites will be blocked, dog websites will be blocked if breeding or ****** or whatever is in the metaheaders. They are very restrictive, unreliable and not needed if the parenting is there along with the family values.
Before computers remember the kid down the street who had his fathers Playboy magazines. I think you get my point. If a kid wants to get to porn the kid will get to porn. If not on your computer on some other source.
Predators don't come from porn sites. They join kids chat groups. Net Nanny type software does not block that.
