Using a jumphost

gistfile1.pl

use Rex -base;

user "foouser";

task "uptime", "your-server", sub {
   say run "uptime";
};

before uptime => sub {
   my ($server, $server_ref) = @_;

   # create local redirect to your-server on port 9999
   system("ssh -fN -L9999:$server:22 your-user\@your-jumphost");
   $$server_ref = "localhost:9999";  # rewrite server reference to localhost:9999
};

after uptime => sub {
   my ($server) = @_;

   my ($localhost, $port) = split(/:/, $server);

   # get the redirecting process
   my ($process) = grep { $_->{command} =~ m/^ssh \-fN \-L$port:$localhost/ } ps;

   kill $process->{pid};
};