Also I found that some characters in the passwords have to be escaped

You shouldn't need to quote the password. Actually the "Permission denied, please try again" error indicates a bad password. In any case, could you post your code? otherwise is difficult to guess what can be failing.

Also, run your script with $Net::OpenSSH::debug = -1 and post here the full output.

What versions of the Net::OpenSSH, perl, OpenSSH and operating system are you using?

In reply to Re^3: Establishing SSH tunnel and opening another SSH connection through it by salva
in thread Establishing SSH tunnel and opening another SSH connection through it by tehcook

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