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Aucun accès aux dossiers du serveur FTP: 425 Can't open data connection for transfer of "/

03/26/2020 0 People found this article helpful 98,389 Views

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    Description

    Depuis une zone locale comme le LAN ou DMZ, vous pouvez acceder a votre serveur FTP. Mais depuis le WAN, la connexion est refusée.

    Si vous faites un packet monitor, vous verrez que les paquets sont envoyés correctement au serveur FTP mais que celui-ci vous montre l'erreur suivante:

    425 Can't open data connection for transfer of "/"

    Image

    Il est possible que ce server FTP n'accepte pas de connexion ayant comme source une adresse IP publique.

     

    Resolution

    Assurez vous d'avoir configuré le serveur FTP en suivant les guides suivants

    Configuration for a Passive Mode FTP Server behind the SonicWall. (SW10090)

     

    Une méthode de contourner le problème peut être de créer une règle de NAT pour changer la source publique vers une adresse privée.

    Original Source : ANY

    Translated Source : A private IP address

    Original Destination : FTP Server Public (typically X1 or a WAN interface)

    Translated Destination : Private IP address FTP Server

    Original Service : FTP Custom Group

    Translated Service : ORIGINAL

    Inbound Interface : X1 (or the WAN interface used)

    Outbound Interface : Any

    Image

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