Run SENDMAIL as it’s own different user

 You may need to change Sendmail to run as another user instead of root. In order to do this, run the commands below. We are using sendmail for the user, and sendmail for group. Make sure to stop the sendmail service by using the service sendmail stop command. You may also need to kill any running processes by using the killall sendmail command. groupadd -g 24 sendmail useradd -u 24 -g 24 -M -d /var/spool/mqueue \-s /dev/null sendmail chown -R sendmail:sendmail /var/spool/mqueue chmod 700 /var/spool/mqueue chgrp -R sendmail...

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Choosing the right Firewall

 Part of good network is proper hardware like router/firewall.  Using cheap and basic equipment may work for home users, but it is not perfect for business applications.  In a business, it is important to protect information and data access is paramount.  This is why it is recommended to invest in a security system to prevent cyber-attacks, and ensure network up-time and access to you data and applications. Systems security is not just made of one thing. There are many links in the chain: user account and password security, anti-virus...

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Make CAT-5 cable

 There are two standard Cat5 and Cat6 wiring diagrams.  I use Cat5-B, some people use Cat5-A.  Both work, so take your pick.

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