connect to computer behind a firewall

is it possible to reach a server behind a firewall with winSCP, if i have the local ip of this server (192.168.0.1) and i have access to the firewall (password + login)?

thanks in advance

'Proxy' tab of login dialog does not help?

We have a setup with a chain of ssh-server and like to copy from Host A (with sftp or winscp) via Host B (openssh-server) to Host C (ssh-server mostly ssh2).
Is there any chance to directly copy to host c.

(It is possible when pubkey athentication is set up and working by using the network transparent data connection with tar (as a pipe))

Any suggestions?

You may also read topic ssh connection over firewall.