A key thing to understand is that traffic to the remote systems will have a source of the remote server. The ssh client can tunnel traffic over the connection using a SOCKS proxy server with a quick one liner. It is more powerful than many users realise giving you access to any system that the remote server can reach, using almost any application. The SSH Proxy feature has been placed at number 1 for good reason. As in all our tutorials and example command sheets, the focus is practical examples that get the job done. In many of these examples, we could achieve the result using several methods. You can push, put and ls to your hearts desire. You will forget, but don't worry everyone does.įor those familiar with command line ftp, many of the commands are similar when using sftp. The port parameter is -P not -p as it is in the ssh client.!. This is a gotcha that hits everyone using scp on the command line. In this example, the file mypic.png was copied to the remoteserver to file system location /media/data and renamed to mypic_2.png.ĭon't forget the difference in the port parameter. localhost:~$ scp mypic.png remoteserver :/media/data/mypic_2.png Note that many parameters for the ssh can be applied to these commands also. The ssh client comes with two other very handy tools for moving files around over an encrypted ssh connection. The configuration file can save a lot of typing by including advanced configuration shortcuts any time a connection is made to particular hosts. More information is found in the man page ( man ssh_config). Note that the first configuration option found will be used, so the most specific should be at the top of the configuration. The second is a wildcard value of * that will match all hosts. The first is a specific host entry with Port 2112 configured, as well as a custom IdentifyFile and username. In the above example ssh configuration file you can see two Host entries.
IdentityFile /home/test/.ssh/remoteserver.private_key This defaults to ~/.ssh/config but can also be specified as a parameter with the -F option. While many users are familiar with the sshd_config file, there is also a client configuration file for the ssh command. To connect to a host that resolves to both IPv4 and IPv6 you can specify parameter -4 or -6 to the command line so it resolves correctly.Īpart from remoteserver, each of the above parameters is optional. Remoteserver : The hostname ssh is connecting to, this can be a fully qualified domain name, an IP address or any host in your local machines hosts file. User can also be specified with the -l parameter. Leaving out the will default to using the username of the account you are currently logged in to (~$ whoami). If you are using the terminal over a slow link or viewing lots of text this can speed up the connection as it will compress the data transferred on the : The string before the symbol denotes the username to authenticate with against the remote server. C : Compression is enabled on the connection using this parameter. The listening port is configured in the sshd_config file using the Port 2222 format. 22 is not required as this is the default, but if any other port is listening connect to it using the -p parameter. p 22 : Specify which port to connect to on the remote SSH server. Can be used multiple times to print additional information. v : Print debug information, particularly helpful when debugging an authentication problem. localhost:~$ ssh -v -p 22 -C remoteserver The following ssh example command uses common parameters often seen when connecting to a remote SSH server. First The Basics Breaking down the SSH Command Line Take a look at Proxy Jump -J and reverse dynamic forwarding -R. Block SSH Brute Force Attempts with iptablesĮven if you are an experienced *nix guru there are a couple of examples further down that are only available in later versions of OpenSSH. Bouncing through jump hosts with SSH and -JĢ1.
Mount remote SSH as local folder with SSHFSĢ0. Copy files remotely with rsync and SSHġ5.
0 kommentar(er)
