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I have been running into an issue with anonymous connections in IIS recently.

We have several windows 2003 server's load balanced running IIS 6.

Through an msc snap in, I can view the number of current anonymous connections. At various times throughout the day, I will notice 1 or 2 of the server's anonymous connections ramp up to 190-220 anonymous connections while the rest of the servers sit around 20-50.

About the time that this starts happening, the sites start throwing 503 errors when you try and visit them in a browser, and occasionally IIS will just get shut off completely.

Is there some setting I am missing in IIS to prevent some kind of limit on connections? Or a way to redirect traffic in the case of 503 errors?

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What you using for LB? –  Vick Vega Apr 26 '11 at 17:28
Not sure, it's hosted at a 3rd party...But we have access to remote in to the servers... –  jcreamer898 Apr 26 '11 at 18:00
I would start with checking into why some servers are getting more anon connections than others. There might be a configuration issue with the LB. –  Vick Vega Apr 26 '11 at 18:06

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