Re^5: Establishing SSH tunnel and opening another SSH connection through it

[salva]

That happens because requesting password authentication disables the authentication agent.

The solution is just to not ask for password authentication in the gateway:

my $ssh_gw = Net::OpenSSH->new($gw); # no password given, authenticate
                                     # using public key on the gateway

my $proxy_command = $ssh_gw->make_remote_command('nc %h %p');

my $ssh = Net::OpenSSH->new($host,
                            password => $password, # request password 
+authentication
                            master_opts => [-o => "ProxyCommand=$proxy
+_command"]);

[tehcook]

That was it ! I was pretty sure that ProxyCommand goes by itself, is non-interactive and uses only public key. And whatever is requested in OpenSSH->new() applies to the destination host. Thank you for help