A Google Webmaster Help thread has complaints from one webmaster that the Google link tool in Google Webmaster Tools shows links from an IP address.

It is not uncommon to see IP addresses in Google Webmaster Tools link report, but is it normal?

Google’s JohnMu said it is normal to see your server’s IP address in the link report. John said:

So do not panic if your links to your web site are from your IP address, it is normal.

Of course, I’d prefer to see most of my links coming from sites off of my server.

Forum discussion at Google Webmaster Help.