execution statement is as follows:
ipmitool -I lan -H 192.168.0.1 -U admin -P 123456789 user list
When the IPMI password of the remote machine is changed using the ipmiv1.5 lan interface, the new password will be sent over the network as clear text. This can be observed and can be exploited to attack remote systems. Therefore, the proposed IPMI password management can only be done through the IPMIv2.0 lanplus interface or at the local station system interface.
In IPMIv1.5, the maximum password length is 16 characters. Password parts longer than 16 characters will be removed.
In IPMI 2.0, the maximum password length is 20 characters; longer passwords will be truncated.
Modify as follows:
ipmitool -I lanplus -H 192.168.0.1 -U admin -P 123456789 user list
The problem disappears.