Simple technology...
192.168.2.221 is local IP address
192.168.2.225 is remote IP address
192.168.2.225 wants a ssh session on 192.168.2.221

command:
ssh -nNT -R 2048:192.168.2.221:22 root@192.168.2.225
note: remove -nNT for a functional ssh session

goto 192.168.2.225 and open a ssh session via this command:
ssh -p 2048 localhost

192.168.2.225 now has a ssh session on 192.168.2.221






-wcb