Users Guide

Table Of Contents
Bitwise AND of the quantities
^
Bitwise exclusive-OR
Examples for IP Filtering
The following RACADM commands block all IP addresses except 192.168.0.57:
racadm set iDRAC.IPBlocking.RangeEnable 1
racadm set iDRAC.IPBlocking.RangeAddr 192.168.0.57
racadm set iDRAC.IPBlocking.RangeMask 255.255.255.255
To restrict logins to a 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:
racadm set iDRAC.IPBlocking.RangeEnable 1
racadm set iDRAC.IPBlocking.RangeAddr 192.168.0.212
racadm set iDRAC.IPBlocking.RangeMask 255.255.255.252
The last byte of the range mask is set to 252, the decimal equivalent of 11111100b.
For more information, see the iDRAC RACADM CLI Guide available at https://www.dell.com/idracmanuals.
Cipher suite selection
Cipher Suite Selection can be used to limit the ciphers in iDRAC or client communications and determine how secure the
connection will be. It provides another level of filtering the effective in-use TLS Cipher Suite. These settings can be configured
through iDRAC web interface, RACADM, and WSMan command line interfaces.
Configuring cipher suite selection using iDRAC web interface
CAUTION: Using OpenSSL Cipher Command to parse strings with invalid syntax may lead to unexpected errors.
NOTE: This is an advanced security option. Before you configure this option, ensure that you have thorough knowledge of
the following:
The OpenSSL Cipher String Syntax and its use.
Tools and Procedures to validate the resultant Cipher Suite Configuration to ensure that the results align with the
expectations and requirements.
NOTE: Before you configure the Advanced Settings for TLS Cipher Suites, ensure that you are using a supported web
browser.
To add custom cipher strings:
1. In iDRAC web interface, go to iDRAC Settings > Services > Web Server.
2. Click Set Cipher String under the Customer Cipher String option.
The Set Custom Cipher String page is displayed.
3. In the Custom Cipher String field, enter a valid string and click Set Cipher String.
NOTE: For more information about cipher strings, see www.openssl.org/docs/man1.0.2/man1/ciphers.html.
4. Click Apply.
Setting the custom cipher string terminates the current iDRAC session. Wait for a few minutes before you open a new
iDRAC session.
Configuring cipher suite selection using RACADM
To configure cipher suite selection using RACADM, use any one of the following commands:
racadm set idraC.webServer.customCipherString ALL:!DHE-RSA-AES256-GCM-SHA384:!DHE-RSA-
AES256-GCM-SHA384
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Configuring iDRAC