John Straiton wrote in to mention these items: Just a quick note about your recent article on turning VRFY off in sendmail. I checked over the sendmail page (733) that you describe on the use of "goaway", and concurr that it seems that it only sets those directives you mention in the article, however it also seems to disable the ETRN command.
4. Maintain Security with sendmail - O'Reilly Media Chapter 4. Maintain Security with sendmail When the administrator is not careful, the misuse or misconfiguration of sendmail can lead to an insecure and possibly compromised system. Since pre-V8.12 sendmail … - Selection from sendmail, 4th Edition [Book] The FreeBSD Diary -- turning sendmail VRFY off John Straiton wrote in to mention these items: Just a quick note about your recent article on turning VRFY off in sendmail. I checked over the sendmail page (733) that you describe on the use of "goaway", and concurr that it seems that it only sets those directives you mention in the article, however it also seems to disable the ETRN command.
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for authwarnings, do not disable it, since there is a better way doing it for hiding local info, the attempt failed. A few Sendmail security settings - Pantz.org A few Sendmail security settings. None of these make your server secure they just help hide some things. In the sendmail.cf file change "O PrivacyOptions=authwarnings
Sendmail - Linux Howto's and tips - Google Sites
The SMTP service must not have the VRFY feature active. Contact. 10161 Park Run Drive, Suite 150 Las Vegas, Nevada 89145. PHONE 702.776.9898 FAX 866.924.3791 info@unifiedcompliance.com The SMTP service must not have the EXPN feature active. Contact. 10161 Park Run Drive, Suite 150 Las Vegas, Nevada 89145. PHONE 702.776.9898 FAX 866.924.3791 info@unifiedcompliance.com cmd:Sendmail Configuration - SourceForge