SMTP spoofing ?

Owen DeLong owen at DeLong.SJ.CA.US
Fri Feb 20 18:15:22 UTC 1998


I believe some trickery with the NAT features in the AS5200 from Cisco
might be a possibility.

Owen

> Are there any routers currently available that can do port 25 spoofing for
> dialup users?  That is, when the user attempts to connect to port 25
> anywhere, he in fact connects to port 25 on your own SMTP server instead. 
> 
> In case it's not obvious, it's for spam management.
> 
> Regards,
> John Levine, johnl at iecc.com, Primary Perpetrator of "The Internet for Dummies",
> Information Superhighwayman wanna-be, http://iecc.com/johnl, Sewer Commissioner
> Finger for PGP key, f'print = 3A 5B D0 3F D9 A0 6A A4  2D AC 1E 9E A6 36 A3 47 
> 
> 



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