Can’t access dashboard, connection times out (other pages work fine)

OK, I just found the problem: I had more than 5000 spam comments (most of them from an IP range I had blacklisted). Apparently it’s a problem for the dashboard, although the comments page works fine… I deleted those comments directly in the DB, and everything is back to normal. Now I just need to find a way to completely block the source IPs in IIS, otherwise I’ll have the same problem in a few weeks…