New web site has 5.11k blocks in 24 hours

A new web site went live late Friday, and I see over 5000 blocks, almost all from 8 IP addresses. They all have the same user agent (Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)) and are blocked by rule 100202 - Anomaly;Header;User-Agent - Fake Bing or MSN Bot.

How can I confirm that they’re not legitimate crawler traffic? I’m researching because there are components of the new site that are not working.

You didn’t post the IP addresses, but I use this to check where they’re coming from:

IP addresses:

52.250.106.194
52.250.62.82
52.250.13.141
52.250.53.201
52.247.221.252
52.250.22.241
52.250.19.204
52.250.11.241

ARIN shows that they all belong to Microsoft.

Microsoft says Bingbot’s IP addresses should reverse-DNS resolve to search.msn.com. The ones you list do not.

Thank you. That’s the information I needed.

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