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:
I'm sorry about the confusion this is causing -- this is a bug in the way we show the data in Webmaster Tools. In short, these links are from your site's IP address, which we incorrectly show (with the "0" and the last two octals swapped). These links would not be a reason for any changes in crawling, indexing, or ranking that your site might be seeing - it's completely normal to have "links" from your server's IP address.
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.