Re: SMTP Scans

From: Chris Boyd <cboyd(at)gizmopartners.com>
Date: Mon Apr 28 2003 - 13:25:15 EDT

On Friday, April 25, 2003, at 07:21 PM, Hoof Hearted wrote:

>
>
> Wow! - OK it's safe to say there is some opinion on this. Many thanks

Many large broadband ISPs are starting to do these types of scans. I think that it's a small price to pay to help reduce the number of open relays and proxies that can be exploited by spammers. See http://security.rr.com/probing.htm for one example. Rather than null route them as others have suggested, you may want to leave the door open for them just to make sure your IDS is still working.

Also, if you own the network, do you think that the AUP really applies?   As you've seen, people are out to get you on the 'net. If the ISP can find a problem box and shut it down before it's used to attack you, isn't that a good thing?

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Received on Tue Apr 29 18:03:03 2003