bingbot

Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)

Proving it is real

• Check the IP against Microsoft's bingbot file.
• Run a reverse DNS lookup, confirm the name ends in .search.msn.com, then confirm it resolves back to the same IP.

Check an address now.

Blocking it

User-agent: bingbot
Disallow: /

(http.user_agent contains "bingbot")

if ($http_user_agent ~* "bingbot") {
    return 403;
}

Matching a name only blocks bots that tell the truth about it. Before you do this, read what each decision costs.