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gateway for sftp/SSH by DeleGate

Yutaka Sato

August 5, 2005

DeleGate/9.0.4 supported gatewaying sftp/SSH server for FTP or HTTP clients. DeleGate to do the gatewaying for FTP or HTTP is invoked as a (reverse) proxy as follows respectively:

delegated -P21 SERVER=ftp MOUNT="/* sftp://SftpServer/*"


                     FTP                          sftp
    FTP-client ----------------- DeleGate ------------------- sftp-server   
                                                  SSH

delegated -P80 SERVER=http MOUNT="/* sftp://SftpServer/*"


                     HTTP                         sftp
   HTTP-client ----------------- DeleGate ------------------- sftp-server   
                                                  SSH

With these DeleGates, the data at "sftp://User@SftpServer/path" can be accessed as "ftp://User@DeleGate/path" or "http://DeleGate/path" respectively.

Note: these DeleGate requires to be able to execute "ssh" command because it uses "ssh" command as a translator from ftp command to sftp/SSH protocol. This gatewaying is not implemented on MS-Windows.

You can combine the sftp/SSH gateway with the TLS(SSL) gateway like this for example:

delegated -P443 SERVER=https MOUNT="/* sftp://SftpServer/*" STLS=fcl


                     HTTPS                        sftp
   HTTP-client ----------------- DeleGate ------------------- sftp-server   
                     SSL                          SSH

Multiple sftp/SSH servers can be served by a single gateway like this for example:

delegated -P443 SERVER=https \ MOUNT="/s1/* sftp://Sftp1/*" MOUNT="/s2/* sftp://Sftp2/*" STLS=fcl


                     HTTPS                        sftp      + sftp-server1
   HTTP-client ----------------- DeleGate ------------------+               
                     SSL                          SSH       + sftp-server2

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