Eric Dahnke writes:

> And I've got 759 kernel warning possible SYN flood from (always unique IPs) on
> our.mail.server.com since sometime early on the 21st.
> 
> Is this really a DoS attack, and if so how can we stop it?

Make sure that your log files are cycled frequently enough to purge the
logs, and contact your provider.

-- 
Sam

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