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Sendmail Lock down...

P

Poontos

Platinum Member
How do you lockdown the EXPN command that anyone can access if they telnet to port 25 on 'nix server running Sendmail?

E.g. lockdown means, get rid of it, pending any side effects.

Thanks.
 
In your m4 config:

define(`confPRIVACY_FLAGS', `noexpn')

Then rebuild your cf file and restart (or kill -1) sendmail, of course.
 
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