Host target.machine
  User          targetuser
  HostName      target.machine
  ProxyCommand  ssh proxyuser@proxy.machine nc %h %p 2> /dev/null

ssh target.machine

ssh -o "ProxyCommand ssh poxyuser@proxy.machine nc -w 1 %h 22" targetuser@target.machine

rsync -v --rsh "ssh proxy.machine ssh" target.machine:/remote/file /local/dir/

$ ssh -f -N -L <localport>:<target.machine:port> user@proxy.machine
$ scp target-user@local.machine:/remote/file -P <localport> .

scp -o "ProxyCommand ssh pcreds@proxy.machine -W %h:%p" tcreds@target.machine:file .

Host target.machine
    ProxyCommand ssh pcreds@proxy.machine -W %h:%p

scp tcreds@target.machine:file .

scp -o "ProxyCommand=nc -X connect -x proxyhost:proxyport %h %p" remote_user@remote_host:remote_path local_path

ssh user@proxy.machine "ssh user@target.machine 'cat > file'" < file

tar cf - file1 file2 folder1/ | ssh user@proxy.machine "ssh user@target.machine 'tar xvf -'"

scp -o "ProxyCommand ssh user@myproxyserver.com nc %h %p" your.filename username@yourdestination.yourdomain.com:/whatever_location

ssh login@proxy_host

scp login@source_host:/path_to_source_file
  login@destination_host:/path_to_destination_directory