Users Guide

Configuring Security Features 227
To restrict the login to a single IP address (for example, 192.168.0.57), use the
full mask, as shown below.
racadm config -g cfgRacTuning -o
cfgRacTuneIpRangeEnable 1
racadm config -g cfgRacTuning -o
cfgRacTuneIpRangeAddr 192.168.0.57
racadm config -g cfgRacTuning -o
cfgRacTuneIpRangeMask 255.255.255.255
To restrict logins to a small set of four adjacent IP addresses (for example,
192.168.0.212 through 192.168.0.215), select all but the lowest two bits in the
mask, as shown below:
racadm config -g cfgRacTuning -o
cfgRacTuneIpRangeEnable 1
racadm config -g cfgRacTuning -o
cfgRacTuneIpRangeAddr 192.168.0.212
racadm config -g cfgRacTuning -o
cfgRacTuneIpRangeMask 255.255.255.252
IP Filtering Guidelines
Use the following guidelines when enabling IP filtering:
• Ensure that cfgRacTuneIpRangeMask is configured in the form of a
netmask, where all most significant bits are 1’s (which defines the subnet
in the mask) with a transition of all 0’s in the lower-order bits.
• Use the range base address you prefer as the value for
cfgRacTuneIpRangeAddr . The 32-bit binary value of this address should
have zeros in all the low-order bits where there are zeros in the mask.