A Linux administrator needs to shut down an unresponsive bare-metal server that is located in a remote data center. The site security policy requires that any IPMI traffic be encrypted by using IPMI v2.0's RMCP+ protocol. Which ipmitool command satisfies both the security requirement and the need to power the host off when run from the administrator's workstation?
ipmitool -I lan -H 10.0.0.5 -U admin -a chassis power off
ipmitool chassis power off
ipmitool -I lanplus -H 10.0.0.5 -U admin -a chassis power off
ipmitool -I lanplus -H 10.0.0.5 -U admin -a sdr list
The only command that meets both conditions is the one that uses the lanplus interface and the chassis power off subcommand. The -I lanplus option forces ipmitool to negotiate an RMCP+ (IPMI v2.0) session, providing encryption and stronger authentication, while the chassis power off subcommand instructs the BMC to remove power from the host. The lan interface can also reach the BMC but relies on the older, unencrypted IPMI v1.5 RMCP protocol, violating the policy. A command that omits -H targets the local system interface and therefore cannot manage a remote server. A lanplus command that runs sdr list establishes an encrypted session but only reads sensor data; it does not shut the machine down.
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CompTIA Linux+ XK0-006 (V8)
System Management
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