nanog mailing list archives

Re: SMTP spoofing ?

From: owen () DeLong SJ CA US (Owen DeLong)
Date: Fri, 20 Feb 1998 10:15:22 -0800

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 () 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

Current thread:

SMTP spoofing ? John R Levine (Feb 19)
- Re: SMTP spoofing ? Perry E. Metzger (Feb 19)
  - Re: SMTP spoofing ? John R Levine (Feb 19)
  - Re: SMTP spoofing ? Jon Lewis (Feb 19)
- Re: SMTP spoofing ? Miquel van Smoorenburg (Feb 20)
  - Re: SMTP spoofing ? Steven L. Johnson (Feb 23)
- <Possible follow-ups>
- Re: SMTP spoofing ? sully (Feb 19)
- Re: SMTP spoofing ? Owen DeLong (Feb 20)