ssh tunnel with key for tunnel only

cat .ssh/authorized_keys

no-pty,no-X11-forwarding,permitopen="10.157.80.133:8090",command="/bin/echo do-not-send-commands" ssh-dss AAAxSEm45jSTIFxSWl+JmeiaOe/re2J6xDQ/PMiKd9VkaVUdg== lunohod@deb

ssh -i /home/lunohod/.ssh/id_dsa lunohod@10.157.0.21 -L 10.10.0.1:8090:10.157.80.133:8090 -N -g #-f