wilderness - 3:02 pm on Jan 9, 2013 (gmt 0)
What I am seeking is has anyone had the bot act in such an aggresive behavior that it acted like a DNS attack on the server.
The Bing/MSN bots have been "acting in an aggressive manner" on one of my sites for months, however NOT from the 131.253.2x range.
FWIW, I'd much rather have bot requests all grouped together in what might be deemed an aggressive manner. Their certainly easier to analyze in that order.
In fact, MSN/Bing is still requesting pages from the same site that haven't been online for three years.
If the requests are taking your server down, possibly other issues exist which are causing the overload.