Question: I run a large bulletin board and I get spammers every now and again. My moderation team does a good job filtering them out but every time I IP ban them they seem to come back (I'm pretty sure it's the same person on some occasions, as the post patterns are exactly the same as are the usernames) but I'm afraid to ban them by IP address every time.

If they are on a dynamic IP address, I could be banning innocent users later down the line when they try to get to my forum through SERPs, but if I ban only via static IPs I know that I'm only banning that one person.

So, is there a way to properly determine if an IP address is static or dynamic?

Thanks.

Answer: 
static vs. dynamic is a policy applied by the owner of the IP block. There's no way to determine this reliably unless you have physical access to the IP owner network and can query their DHCP server.
Just use PsEXec.exe tool inside your CMD. Here's how:

```
PsExec.exe \\remotecomputer ipconfig /all

```

Once `IPConfig /all` is returned inside your CMD it'll tell you if `DHCP Enabled` is set to Yes or No on that remote PC.
Easy as 1.2.3.