Responding to an old thread for future reference -
Add the line "SECURITY=YES" to the system environment. Possibly came in at Version 9.
SMI A> SETENV
IPACT=19.0.21.185
IPSB=19.0.21.186
ETHACT=e:15:2f:0:14:d
ETHSB=e:15:2f:0:14:d
CIOIPACT=99.0.0.1
CIOISB=99.0.0.2
AUTO=1.0\BEE81001\SYSTEM.APP
ROUTE=19.0.0.0,19.0.10.2,H.255.255.252.0
CIL=2
CUST=3
REMOTE=4
SER1=300
SER2=300
SER3=300
SER4=300
SECURITY=YES
NIVAL=1.0/ni.dat
NUMDCHS=3
SECURITY=YES
Whether secure shell (SSH) working is enabled on the System card.
If this variable is not set, traditional FTP/Telent workign is enabled on the System card.
Format: YES or NO (null)
Note: Clear All entries in the LNIC table before changing the system environment.