SMTP: Missing "HELO"

This protocol anomaly triggers when it detects an SMTP command without a prior HELO command. As all SMTP clients and servers use HELO, this can indicate an attacker or an exploit script manually trying to send commands to an SMTP server.

Short Name
SMTP:AUDIT:REQ-MISSING-HELLO
Severity
Info
Recommended
False
Recommended Action
None
Category
SMTP
Release Date
08/27/2003
Supported Platforms

srx-branch-12.3

srx-19.3

srx-branch-19.3

vsrx3bsd-19.2

srx-branch-19.4

vsrx-19.4

mx-12.3

mx-19.4

vmx-19.4

mx-19.3

vsrx3bsd-19.4

srx-19.4

vsrx-12.3

vmx-19.3

vsrx-19.2

srx-12.3

Sigpack Version
3324
False Positive
Unknown

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