Configure firewall to allow an Interix (SUA) application

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http://serverfault.com – I have installed wget inside the Subsystem for UNIX-based Applications. I want to download something through wget inside SUA. My Windows Firewall is configured to block anything except allowed rules. What program should I allow for wget to be able to connect and download anything? I already tried allowing c:\Windows\posix.exe and c:\Windows\SUA\usr\local\bin\wget with no luck. A temporary workaround I use is to configure wget to use an http proxy installed locally. EDIT: I have found a solution to allow ALL applications in SUA. This is C:\Windows\System32\psxss.exe which should be allow (HowTos)