iDRAC no longer accessible

Hi,

lately  I wanted to restrict the ssh access of my iDRAC 8 to a particular ip. So I thought of:

racadm config -g cfgRacTuning -o cfgRacTuneIpRangeEnable 1

racadm config -g cfgRacTuning -o cfgRacTuneIpRangeAddr 1.2.3.4

racadm config -g cfgRacTuning -o cfgRacTuneIpRangeMask  255.255.255.252

I was logged in as root from two different IPs.

after the statement 

"racadm config -g cfgRacTuning -o cfgRacTuneIpRangeEnable 1"

all of a suddeb the shell of both logins were frozen.

I am no longer able to access the iDrac...

..no SSH, no web based access.

Is there a chance to recover that without rebooting ?

What can be done in order to make it accessible again ?

Is it useful to wait for a few hours  ?

Thanks for your reply !

Best!

Thor