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Generally runs over an SSH connection. SSH File Transfer Protocol (SFTP), a secure alternative to FTP (not to be confused with FTP over SSH or FTPS) Files transferred over shell protocol (FISH), released in 1998, which evolved from Unix shell commands over SSH; Fast and Secure Protocol (FASP), aka Aspera, uses SSH for control and UDP ports for ...
A common application of this model is the use of ssh-rpc 'bot' users between computers, whereby public keys are distributed to a set of computers for automated access from centralized hosts. The TOFU aspect of this application forces a sysadmin (or other trusted user) to validate the remote server's identity upon first connection.
It is possible, however, to run it over SSH-1 (and some implementations support this) or other data streams. Running an SFTP server over SSH-1 is not platform-independent as SSH-1 does not support the concept of subsystems. An SFTP client willing to connect to an SSH-1 server needs to know the path to the SFTP server binary on the server side.
In the past, in remote-to-remote secure copy, the SCP client opens an SSH connection to the source host and requests that it, in turn, open an SCP connection to the destination. (Remote-to-remote mode did not support opening two SCP connections and using the originating client as an intermediary).
An SSH client is a software program which uses the secure shell protocol to connect to a remote computer. This article compares a selection of notable clients. This article compares a selection of notable clients.
ssh-agent creates a socket and then checks the connections from ssh. Everyone who is able to connect to this socket also has access to the ssh-agent. The permissions are set as in a usual Linux or Unix system. When the agent starts, it creates a new directory in /tmp with restrictive permissions. The socket is located in this directory.
Stunnel uses public-key cryptography with X.509 digital certificates to secure the SSL connection, and clients can optionally be authenticated via a certificate. [6] If linked against libwrap, it can be configured to act as a proxy–firewall service as well. [citation needed]
The client can choose to accept the certificate or reject the connection. This is in contrast to the SSH File Transfer Protocol (SFTP), which does not present signed certificates, but instead relies on Out-of-band authentication of public keys.