ipmitoolで接続できない時「-vv」オプションをつけて実行すると詳細な情報が見れていいです。 $ ipmitool -I lan -H xxx.xxx.xxx.xxx -U username -P password chassis power status -vv ipmi_lan_send_cmd:opened=[0], open=[4519072] IPMI LAN host xxx.xxx.xxx.xxx port 623 Sending IPMI/RMCP presence ping packet Received IPMI/RMCP response packet: IPMI Supported ASF Version 1.0 RMCP Version 1.0 RMCP Sequence 255 IANA Enterprise 206158434750 ipmi_lan_s