
Configuring Security and Authentication
Chapter 8 81
Sniff Session
A sniff session enables multiple users to access a single serial port for viewing
the data stream. Anyone who is registered for a sniff session can access a
specific serial port — even if someone else is using the port. The Digi CM unit
supports multiple concurrent sniff sessions.
Sniff session mode has four options: disabled, input, output, and both. You
configure the sniff session modes per port from the serial port configuration
page.
Enable/Disable sniff mode
• Disabled - No one can enter a sniff session after the first user logs on.
• Enabled - Allows all users with access the following options in sniff
mode:
Type of Users Access Types How to Permit or Restrict
Only specific users
have access
"Permitted Users"
Access type is unchecked for
Everyone (meaning All other
users) does not have access
By listing specific users and
checking the access types -
(Permitting them access)
All users have
access except for a
few "Restricted
Users"
Everyone has access to every-
thing by checking the access
types. If an access type is
unchecked, all users are
restricted from that access type.
By listing users and uncheck-
ing the access type they are
restricted from using
log in
port 3
log in
port 3
Network (Ethernet)
serial
Sniff Session
Main Session
Port 3
(Read only access)
(Read/write access)
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