Is your e3000 Environment Secure? Homestead security
page 80April 24, 2003
Is Your Homestead Secure? - Solution Symposium West
Sendmail – check syslog for suspicious
activity
• Unauthorized relay attempts from spammers:
Oct 16 11:44:14 localhost sendmail[190251173]:
f9GIi9M6190251173: ruleset=check_rcpt,
arg1=<user@somewhere.com>, relay=spam.host.com
[12.34.56.78], reject=550 5.7.1
<user@somewhere.com>... Relaying denied
• Hacker probes:
Feb 20 16:26:10 localhost sendmail[1114264]:
h1L0Q8ER1114264: hacker.host [12.34.56.78] did
not issue MAIL/EXPN/VRFY/ETRN during connection
to MTA