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NetLinx Security
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NetLinx Master Cards and Modules
NetLinx Security
NetLinx Masters (version 2.10.80 or later) have built-in security capabilities. It will require a valid
user name and password to access the NetLinx System’s Telnet, HTTP and FTP servers.
The security capabilities are configured and applied via a Telnet connection or the NetLinx
Master’s RS-232 terminal interface (the DB-9
PROGRAM port on the front panel of the Master).
NetLinx Security Features
NetLinx security allows you to define access rights for users or groups.
The following table lists the NetLinx features that the administrator (or other 'qualified' user) may
grant or deny access to.
Security Terms Used in This Document
User
A user is a single potential client of the NetLinx master.
Group
A group is a logical collection of users. Note that any properties possessed by groups (i.e., access
rights, directory associations, etc.) are inherited by all of the members of the group.
Always use the Program port when entering potentially sensitive security information. The Telnet
server interface exposes this security information to the network in clear text format, which would
be rather easy to intercept by an unauthorized client. By using the Program port, there is some
level of security during the configuration of the database, due to the physical proximity of the user
to the system.
A "User" represents a single potential client of the NetLinx Master, while a "Group" represents a
logical collection of users. Any properties possessed by groups (i.e., access rights, directory
associations, etc.) are inherited by all the members of the group.
NetLinx Security Features
NetLinx Master Security Configuration The user has access to the security configuration commands of the
NetLinx Master. Only those users with security configuration access
rights granted will have access to the security configuration com-
mands.
Telnet Security The user has access to the Telnet server functionality. All basic com-
mands are available to the user.
Terminal (PROGRAM port) Security The user has access to the Terminal (RS232 PROGRAM port) server
functionality. All basic commands are available to the user.
HTTP (web server) Security The user has access to the HTTP server functionality. Directory asso-
ciations assign specific directories/files to a particular user.
FTP Security The user has access to the FTP server functionality. Only the adminis-
trator account has access to the root directory; all other 'qualified' cli-
ents are restricted to the /user/ directory and its 'tree'.