HP Integrated Lights-Out IP Address Range Restrictions, IP Address and Subnet Mask Restrictions

Directory-Enabled Remote Management 199

IP Address Range Restrictions

IP address range restrictions enable the administrator to specify network addresses that are granted or denied access by the restriction. The address range is typically specified in a low-to-high range format. An address range can be specified to grant or deny access to a single address. Addresses that fall within the low to high IP address range meet the IP address restriction.

IP Address and Subnet Mask Restrictions

IP address and subnet mask restrictions enable the administrator to specify a range of addresses that are granted or denied access by the restriction. This format has similar capabilities as an IP address range but might be more native to your networking environment. An IP address and subnet mask range is typically specified using a subnet address and address bit mask that identifies addresses that are on the same logical network.

In binary math, if the bits of a client machine address, added with the bits of the subnet mask, match the restriction subnet address, then the client machine meets the restriction.

DNS-Based Restrictions

DNS-based restrictions use the network naming service to examine the logical name of the client machine by looking up machine names assigned to the client IP addresses. DNS restrictions require a functional name server. If the name service goes down or cannot be reached, DNS restrictions cannot be matched and will fail.

DNS-based restrictions can limit access to a single, specific machine name or to machines sharing a common domain suffix. For example, the DNS restriction, www.hp.com, matches hosts that are assigned the domain name www.hp.com. However, the DNS restriction, *.hp.com, matches any machine originating from HP.

DNS restrictions can cause some ambiguity because a host can be multi-homed. DNS restrictions do not necessarily match one-to-one with a single system.