Hacking?

[ClassicRox]

Over the last 3 days, I've been getting this kind of log entries:

<02/15/05@19:00:40> [source] invalid password from GET / HTTP/1.0 67.175.231.7
<02/15/05@19:08:14> [source] invalid password from GET / HTTP/1.0 67.175.231.7
<02/15/05@19:15:58> [source] invalid password from GET / HTTP/1.0 67.175.231.7
<02/15/05@19:23:28> [source] invalid password from GET / HTTP/1.0 67.175.231.7

That's only a small portion of it. It seems to repeat itself every 7 1/2 to 8 minutes, as you can see by the log.

Is this someone trying to hack my admin password? If so, what should I do about it?