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I went to and clicked on SO. After a few minutes I got a message saying "We have detected too many requests from this IP. If this is an error contact us." That was the second SE page I tried to visit. Second only to

I moved to another machine and it's working now. The first machine usually works, I don't know if a got assigned a blacklisted IP or what. Anyone know what's going on?

EDIT: I would really rather not post my IP on the web, but if a diamond or dev asks I'll email it.

EDIT 2: I looked at badp's dupe suggestion and can verify that I have no scripts frequently calling SO.

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Do you know the IP of the first machine? – waiwai933 Jan 21 '11 at 1:52
@waiwai933: They are on the same LAN. Do you mean the external IP? – John Jan 21 '11 at 1:54
Are your machines all sitting behind a NAT'd LAN with a single WAN IP address? – Kev Jan 21 '11 at 2:44
@Kev: I believe that to be correct. So I don't know how they could block my IP and it only affect one machine... Just checked again, the first machine works now. – John Jan 21 '11 at 2:50
possible duplicate of Too many requests from my IP address? – badp Jan 21 '11 at 8:48
@badp not really, this one here is better asked and have official answer, closed the other one as dupe of this one. – Shadow Wizard Dec 4 '14 at 15:20
@ShadowWizard points at the timestamp – badp Dec 4 '14 at 16:17
@ShadowWizard points at the timestamp of the comment you were originally replying to – badp Dec 4 '14 at 17:24
@badp lol, but never too late to find dupes and make the place bit more organized. :) – Shadow Wizard Dec 4 '14 at 18:45
up vote 7 down vote accepted

There is a temporary automatic ban that is put up by our HAProxy instance when you hit our rate limiter. It should only last about 5 mins. If you'd like us to take a look we'll need the public IP at the time you can email to george AT stackoverflow DOT com

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Hi, how high is this rate limiter? Please. – AnthonyMaia May 31 '12 at 12:58
@AnthonyMaia you really expect them to make it public?? – Shadow Wizard Dec 4 '14 at 15:18

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