#CHANGE WEBMIN PORT INSTALL#
Use the Software Packages module check for and install everything that is needed. You may also need to install the OpenSSL library as well, which should also be available in package form. Often there will be several, such as openssh, openssh-client and openssh-server, all of which should be installed. Most modern Linux distributionsĬome with an OpenSSH package, so check your distribution CD or website for any packages whose names start with openssh or ssh. If an error message like The SSH server config file /etc/ssh/sshd_config was not found on your system appears instead, there is probably no SSH server is installed on your system. Both files are directly edited by the Webmin module covered in this chapter. The same directory also contains the file ssh_config, which sets options that apply to the SSH client programs (such as ssh and scp) run on your system. As is usual with Unix server configuration files, each sets some option such as the list of denied users or the IP address to listen on. The primary file is called sshd_config, and consists of a series of directives, one per line. The directory /etc/ssh contains all the configuration files used by both SSH servers, and even though the filenames are the same their formats are slightly different.
Fortunately the latest releases of both packages support both versions.
In addition there are two different versions of the protocol that are not compatible, versions 1 and 2. There are many different SSH clients and servers available, but the two most common client/server packages on Unix systems are the freely available open-source OpenSSH and the original commercial SSH.
#CHANGE WEBMIN PORT PASSWORD#
Client authentication is done either with a username and password or a username and private key, while server authentication always uses a key.
Both the client and server authenticate themselves to each other, so that each can be sure that of the others identity. An SSH client is a program run by a user (or from a script) that connects to a server to start a remote login session or transfer some files. In a way, SSH can be thought of as a secure replacement for those protocols, although in fact it can be used for much more.Īn SSH server is a daemon process that runs on a Unix system waiting for connections. All SSH traffic is encrypted so that anyone listening in on the network cannot capture passwords, which is a vast improvement over the insecure telnet and FTP protocols. Secure Shell or SSH is a protocol for securely logging in to and transferring files between computers over a network.
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