I've got OpenSSH_6.2 from the latest snapshot and would like to cancel 
remote forwarding without closing the existing session.  I seem to be 
missing something with the escape sequence ~CKR

If I start remote forwarding like this:

        ssh -R 9000:localhost:80 192.0.43.10

The remote machine can access port 80 via its port 9000.  And if I use the 
following escape sequence,

        ~C
        KR9000

ssh reports having canceled the forwarding:

        ssh> -KL9000
        Canceled forwarding.

However, the remote machine is still able to use the forwarded port until 
the connection is finally closed.  The same syntax seems to shutdown 
regular (-L) forwarded ports, just not for reverse (-R) forwarding.  What 
am I missing?  

Regards,
/Lars

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