IronPort Systems 4108GL - Manual (Page 197)

10-13
Using Authorized IP Managers for Increased Management Security
Using Authorized IP Managers
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Additional Examples for Authorizing Multiple Stations
Operating and Troubleshooting Notes
■ Network Security Precautions: You can enhance your network’s secu-
rity by keeping physical access to the switch restricted to authorized
personnel, using the password features built into the switch, and prevent-
ing unauthorized access to data on your management stations.
■ Modem and Direct Console Access: Configuring authorized IP manag-
ers does not protect against access to the switch through a modem or
direct Console (RS-232) port connection.
■ Duplicate IP Addresses: If the IP address configured in an authorized
management station is also configured in another station, the other station
can gain management access to the switch even though a duplicate IP
address condition exists.
■ Web Proxy Servers: If you use the web browser interface to access the
switch from an authorized IP manager station, it is recommended that you
avoid the use of a web proxy server in the path between the station and
the switch. This is because switch access through a web proxy server
requires that you first add the web proxy server to the Authorized Manager
IP list. This reduces security by opening switch access to anyone who
uses the web proxy server
. The following two options outline how to
eliminate a web proxy server from the path between a station and the
switch:
• Even if you need proxy server access enabled in order to use
other applications, you can still eliminate proxy service for web
access to the switch. To do so, add the IP address or DNS name
of the switch to the non-proxy, or “Exceptions” list in the web
browser interface you are using on the authorized station.
• If you don’t need proxy server access at all on the authorized
station, then just disable the proxy server feature in the station’s
web browser interface.
Entries for Authorized
Manager List Results
IP Mask 255 255 0 255 This combination specifies an authorized IP address of 10.33.xxx.1. It could be
applied, for example, to a subnetted network where each subnet is defined by the
third octet and includes a management station defined by the value of “1” in the
fourth octet of the station’s IP address.
Authorized
Manager IP 10 33 248 1
IP Mask 255 238 255 250 Allows 230, 231, 246, and 247 in the 2nd octet, and 194, 195, 198, 199 in the 4th octet.
Authorized
Manager IP 10 247 100 195