It seems that Net::SFTP::Foreign is requesting to use just password authentication.

Could you activate debug mode to see exactly how it is calling ssh? 

$Net::SFTP::Foreign::debug = ~(8|16|1024|2048);

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Show me also your script code.

When I try it myself ssh gets the right preferred authentications list: 

debug3: preferred publickeys,password,keyboard-interactive

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May you be clobering the more argument passing a second one with the '-vvv flags?

In reply to Re^5: Does Net::SFTP::Foreign support identity file and user password? by salva
in thread Does Net::SFTP::Foreign support identity file and user password? by Tanoti

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