Whats this

[tiburon]

I got 600 guests visiting the forum same time. They all are from

ns29349.ovh.net / 91.121.102.43

Should I block this? How?

[Michael Martinez]

OVH.net is a French Web hosting company. I would be suspicious about that kind of traffic, as it could mean you have a rogue robot crawling your site.

Do you have access to your raw server logs? Can you see what user agents they are using, what URLs they are fetching, how close together the fetches are? Google Analytics won't tell you anything useful (if you use that).

[Steve20]

I also experience such thing but not that much, I only got 200 visitors from one referral. -- Are they Spam?

[Michael Martinez]

I would have to see full server log entries to better understand what is happening.