Why does the `fence_ipmilan` fence agent always fails with `Error in open session response message : no matching cipher suite` ?

Issue

• The fence_ipmilan fence agent reports for the following error with increased verbosity with cipher value 1 is used:

# fence_ipmilan -a 10.10.10.10 -P -l '$USER' -p $IDRACPW --power-timeout=120 -v -C 1 -o status
2023-07-16 19:51:35,852 INFO: Executing: /usr/bin/ipmitool -I lanplus -H 10.10.10.10 -p 623 -U root -P [set] -C 1 -L ADMINISTRATOR chassis power status
2023-07-16 19:51:35,857 DEBUG: 1  Error in open session response message : no matching cipher suite
Error: Unable to establish IPMI v2 / RMCP+ session
2023-07-16 19:51:35,857 ERROR: Failed: Unable to obtain correct plug status or plug is not available

• When using the cipher value as 1, the fence agent fence_ipmilan reports for no matching cipher suite error.