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NDR attack

econn31
econn31 asked
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I help run a network (100-200 clients) Our mail server - through microsoft exchange 2003 - is the target of a reverse NDR attack. Using wireshark I've seen the tell tale pattern. As an administrator what steps should i take to stop this NDR attack? Thanks
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Alan HardistyCo-Owner
Top Expert 2011
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Turns out we had already had the recipient filtering on - I think we were under a DHA. But the steps helped clean our the mail queues