How much price it is required to purchase a Rebex server and can it be used in various machines with a single license?

October 19, 2016, 1:14 am

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I want to know the price to purchase a Rebex server used for SFTP Connectivity and can it be used in various machines with a single purchased license.
It must support private key Authentication too. Currently I used a Rebex Server Beta Version that supports the same but it's trial version has expired.

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Answered: Get IP Address of Connected Client?

January 11, 2017, 2:33 am

≫ Next: Answered: Server IP works for local 127.0.0.1 , but not working for IP address Comcast assigned

≪ Previous: How much price it is required to purchase a Rebex server and can it be used in various machines with a single license?

IP address is not available in FileUploaded/FileDownloaded events (yet), but you can work around this by using a custom user class and a custom Authentication event that associates an IP with a per-session user object.

Try using this custom user class:

public class CustomUser : FileServerUser
{
    private readonly string _userName;
    private readonly string _password;
    private readonly string _virtualRootPath;

    public CustomUser(string userName, string password, string virtualRootPath)
        : base(userName, password, virtualRootPath)
    {
        _userName = userName;
        _password = password;
        _virtualRootPath = virtualRootPath;
    }

    private class ActiveCustomUser : CustomUser
    {
        public IPAddress Address { get; private set; }

        public ActiveCustomUser(IPAddress address, string userName, string password, string virtualRootPath)
            : base(userName, password, virtualRootPath)
        {
            Address = address;
        }
    }

    public FileServerUser ToActiveUser(IPAddress address)
    {
        return new ActiveCustomUser(address, _userName, _password, _virtualRootPath);
    }

    public static IPAddress GetAddress(FileServerUser user)
    {
        var activeUser = user as ActiveCustomUser;
        if (activeUser == null)
            return IPAddress.None;
        else
            return activeUser.Address;
    }
}

To make it work, you have to provide Authentication and FileUploaded/FileDownloaded events:

var server = new FileServer();
server.Keys.Add(SshPrivateKey.Generate());
server.Bind(22, FileServerProtocol.Sftp);

server.Users.Add(new CustomUser("user01", "password", @"c:\temp\SftpRoot"));

server.Authentication += (sender, e) =>
{
    var user = (CustomUser)e.Users[e.UserName];

    if (user.CheckPassword(e.Password))
    {
        e.Accept(user.ToActiveUser(e.ClientAddress));
        return;
    }

    e.Reject();
};

server.FileUploaded += (sender, e) =>
{
    IPAddress address = CustomUser.GetAddress(e.User);
    ...
};

server.Start();

Rejecting access from unwanted IP addresses is possible in Connecting event:

server.Connecting += (sender, e) =>
{
    e.Accept = IsAllowed(e.ClientAddress);
};

This will still accept the incoming connection, but it will be closed immediately without performing any SSH negotiation. If you prefer rejecting the connection attempts without accepting them first, you would have to do that at the firewall.

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Answered: Server IP works for local 127.0.0.1 , but not working for IP address Comcast assigned

January 11, 2017, 3:52 am

≫ Next: Encrypt content list for Zip file

≪ Previous: Answered: Get IP Address of Connected Client?

Hi,

I assume that most Internet provider these days provide a modem/router to which multiple devices could be connected. In these cases, the local network is using a private IP address range that is not accessible from the Internet, and the router performs network address translation for outgoing connections.

If this is the case, you have to configure the modem/router to forward incoming connections to port 22 (or other) to your SFTP servers's local IP address. This is somewhat beyond the scope of Rebex SFTP support, but there is plenty of information on the web about this. Try this search, for example.

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Encrypt content list for Zip file

January 11, 2017, 8:01 am

≫ Next: Answered: Encrypt content list for Zip file

≪ Previous: Answered: Server IP works for local 127.0.0.1 , but not working for IP address Comcast assigned

Hi,

Is there any way to encrypt Zip file content list with your current Rebex.Zip ? Looks like right now only file content is encrypted but someone can still browse the zip file and see files inside even though its encrypted?

Thanks

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Answered: Encrypt content list for Zip file

January 12, 2017, 1:02 am

≫ Next: But my enviroment only has one user, we still want to get Client IP

≪ Previous: Encrypt content list for Zip file

This is part of Strong Encryption Specification (SES) format. Even though we could easily add support for it, we are not allowed to do this because SES is a patented technology and PKWARE refused to grant us a license:

"Regarding your request for a license for the Single Password Symmetric Encryption technology, PKWARE is discontinuing this licensing program and no further licenses will be issued under it. We are unable to grant your request." - PKWARE, Inc.

Sadly, this means we can't add support for ZIP content list encryption. Sorry!

Double-zipping approach you used is the recommended workaround for this, and it's sufficient to only encrypt the second ZIP.

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But my enviroment only has one user, we still want to get Client IP

January 14, 2017, 8:26 pm

≫ Next: How to get IP of the client in the upload/download event?