Two weeks ago I set up a web server in my home, while I was home from college for the weekend. I'm not worried about most of my systems since they are Macs. But I run a line from my apartment to the main part of the house to my uncles computer (Which is a PC). He's quite computer illiterate, and he's been telling me that he's been getting "odd messages" (In the past these, usually they're 404's or he's gotten a cannot deliver mail return because he didn't type in the address correctly. But from what he's describing it doesn't sound like the usual for him)

Anyhow when I got home this weekend I checked the log of the http server software and noticed quite a few attempts for a "Windows Virus Request". Half seem to come from what looks like a Router address on my ISP the other from other ISPs.

Now since my IP is assigned dynammically , I am using DNS rerouting utilies.

Now here's my question(s).

1st, any ideas WHAT these request are? Is someone trying to hack my LAN?

2. I haven't investigated on my uncles system yet, but I'm curious if these are the cause of his "odd messages"?

3. I'm using a D-Link DI 704 Router for my NAT, it does have a built in Firewall. if these request are a threat to me should I to use it to block these request?

Any help would be most appreciative