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I have discovered strange IP addresses in Apache logfiles:

74.125.78.95
74.125.38.82

For some users these IP addresses appear in the middle of the session.

What are these IP adresses? Is Google running proxy servers/anonymizers now?

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I'm just guessing, but it could be that they are identifying with something else than Googlebot as agent to check for cloaking based on user agent string. – Frands Hansen Jan 2 at 10:00
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See this link to project honeypot http://www.projecthoneypot.org/ip_74.125.78.95 It's just a webspider. Nothing to worry about.

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I have 2 users who have logged in from Google's IP addresses 74.125.78.95 and 74.125.38.82. Is spider creating accounts? – lars Jan 2 at 9:59
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If you look at the user agents listed on that page, you'll see that Google Wireless Transcoder (google.com/gwt/n) has been seen from that IP. That could explain why users have been logging in from it. – Zanchey Jan 2 at 10:06
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