First thing you should do is to remove the -o => 'PreferredAuthentications publickey' part that is not really required and may interfere with Net::SFTP::Internals... unless you have some reason to include it!

Do you know the vendor and version of the remote software? you can just telnet the server at port 22 and it will tell you.

In reply to Re^3: Issue in SFTP connection using Net::SFTP::Foreign- by salva
in thread Issue in SFTP connection using Net::SFTP::Foreign- by iit2011101

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