RE: Securing your Linux Box

[Alexander Woodby <awoodby tir com>]

Are you sure they even got in?  (do a 'last'  or maybe 'last |more')

They may have just used your sendmail to relay, do
rpm -q sendmail

if you have pre 8.8.8 or so, you should upgrade to 8.9.x from a mirror
site such as ftp.ou.edu

After this, look in /etc/mail/access and turn on yourself to access
sendmail, then do
makemap hash access.db <access
from that directory to make the db file, restart sendmail and you should
be set.


Aside from that, the best bet to secure your system is to upgrade
packages, just look on your mirror site, and rpm -U the packages they
have that are newer (look particularly in the
/mirrors/linux/redhat/updates directory)

Good luck!

--Alexander Woodby
  Kodenet System Administrator