170: If any mail coming from outside of the local LAN block all mails.

Answers: Outside the LAN means cracker.org. All host on exam on example.com domain and outside domain means cracker.org. To block the mail coming from cracker.org 1. vi /etc/mail/access @cracker.rog REJECT 2. service sendmail start | restart 3. chkconfig sendmail on

Service management

Question

170: If any mail coming from outside of the local LAN block all mails.

Explanation

Answers: Outside the LAN means cracker.org. All host on exam on example.com domain and outside domain means cracker.org. To block the mail coming from cracker.org

vi /etc/mail/access @cracker.rog REJECT
service sendmail start | restart
chkconfig sendmail on

Topics

#postfix#mail relay#SMTP restrictions#LAN access control

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