or download this
#/usr/kerberos/bin/rsh remote-host /usr/bin/perl -p -i -e
's/^#\s+NETDUMPADDR=/#\+NETDUMPADDR=\nNETDUMPADDR=ip-address-here\n/g'
+ /etc/sysconfig/netdump
...
connect to address ip-address-here: Connection refused
trying normal rsh (/usr/bin/rsh)
#