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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Stopping open proxies and open relays
Force all SMTP outbound connections from users thru a SMTP proxy. On that proxy, force users to do SMTP Authentication; I've heard only once of a spam code that will use the user's configuration info or dispatch e-mail thru them. Even if they do, you can rate-limit messages/hour, unique mail to/hour, disable mail service after a threshold, whatever sounds a good policy to you. Rubens ----- Original Message ----- From: "Adi Linden" <[email protected]> To: <[email protected]> Sent: Saturday, February 07, 2004 2:43 AM Subject: Stopping open proxies and open relays > > I am looking for ideas to stop the spam created by compromised Windows > PC's. This is not about the various worms and viruses replicating but > these boxes acting as open relays or open proxies. > > There are valid reasons not to run antivirus software, coupled with > clueless users, this results in machines that SPAM again just a few hours > after having been cleaned. > > Adi > >
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