How to use a custom client-side config file has been shown in the next part of this tutorial. Create a folder named. Here, three types of hosts have been defined. It will connect to the SSH server using the default port, The parameters of the third host are defined for all hosts.
The IdentifyFile parameter has defined the location of the public key. The compression parameter has been defined to compress the data. Here, the -i option has been used with the ssh command to mention the path of the public key.
Here, the -i option has been used with the ssh command to mention the path of the public key, and the -p option has been used to define the port number.
Using the custom SSH config file for making an SSH connection with the server has been shown in this tutorial by using the local host of the two accounts. You can follow the same process to make an SSH connection with the host of the remote network. I am a trainer of web programming courses. I like to write article or tutorial on various IT topics.
Valid arguments are: any , inet , inet6. This is useful for running the ssh client from shell script that do not have an interactive user, and prevents accidentally blocking on a password prompt. Specifies to use the specified address on the local machine as the source address of the connection.
Specifies whether to use challenge-response authentication. This is mostly a legacy method and has been replaced by KbdInteractiveAuthentication. Specifies the cipher to use for encrypting the session in protocol version 1. Note that use of protocol 1 is not recommended. Specifies the ciphers allowed for protocol version 2 in order of preference. Multiple ciphers must be comma-separated. The ssh -Q cipher command can be used to query supported ciphers.
The following list is supported in OpenSSH 6. Specifies that all local, remote, and dynamic port forwardings specified in the configuration files or on the command line be cleared. Specifies the timeout in seconds used when connecting to the SSH server, instead of using the default system TCP timeout. Specify the path to the control socket used for connection sharing as described in the ControlMaster section above or the string none to disable connection sharing.
Specifies that a TCP port on the local machine be forwarded over the secure channel, and the application protocol is then used to determine where to connect to from the remote machine.
Specifies whether ssh should terminate the connection if it cannot set up all requested dynamic, tunnel, local, and remote port forwardings. Specifies whether the connection to the authentication agent will be forwarded to the remote machine.
If this option is set to yes , remote X11 clients will have full access to the original X11 display. Set to yes to indicate that the DNS is trusted to securely canonicalize the name of the host being connected to.
These hashed names may be used normally by ssh and sshd , but they do not reveal identifying information should the file's contents be disclosed.
Specifies whether to try rhosts based authentication with public key authentication, using the. Specifies the protocol version 2 host key algorithms that the client wants to use in order of preference. The following values are supported in OpenSSH 6. Specifies an alias that should be used instead of the real host name when looking up or saving the host key in the host key database files.
Remote clients will be refused access after this time. GatewayPorts Specifies whether remote hosts are allowed to connect to local forwarded ports. By default, ssh 1 binds local port forwardings to the loopback address. This prevents other remote hosts from connecting to forwarded ports. GatewayPorts can be used to specify that ssh should bind local port forwardings to the wildcard address, thus allowing remote hosts to connect to forwarded ports. GlobalKnownHostsFile Specifies one or more files to use for the global host key database, separated by whitespace.
Note that this option applies to protocol version 2 only. The default is unset, which means that the default identity will be used. The default is unset, which means that the expected GSSAPI server identity will be determined from the target hostname. With a compatible server, this can delegate the renewed credentials to a session on the server. These hashed names may be used normally by ssh 1 and sshd 8 , but they do not reveal identifying information should the file's contents be disclosed.
Note that existing names and addresses in known hosts files will not be converted automatically, but may be manually hashed using ssh-keygen 1. HostbasedAuthentication Specifies whether to try rhosts based authentication with public key authentication. HostKeyAlgorithms Specifies the protocol version 2 host key algorithms that the client wants to use in order of preference.
The default for this option is: ecdsa-sha2-nistpcert-v01 openssh. HostKeyAlias Specifies an alias that should be used instead of the real host name when looking up or saving the host key in the host key database files. This option is useful for tunneling SSH connections or for multiple servers running on a single host. HostName Specifies the real host name to log into. This can be used to specify nicknames or abbreviations for hosts. The default is the name given on the command line. Numeric IP addresses are also permitted both on the command line and in HostName specifications.
This option is intended for situations where ssh-agent offers many different identities. Additionally, any identities represented by the authentication agent will be used for authentication unless IdentitiesOnly is set. It is possible to have multiple identity files specified in configuration files; all these identities will be tried in sequence. Multiple IdentityFile directives will add to the list of identities tried this behaviour differs from that of other configuration directives.
IdentityFile may be used in conjunction with IdentitiesOnly to select which identities in an agent are offered during authentication. IgnoreUnknown Specifies a pattern-list of unknown options to be ignored if they are encountered in configuration parsing. It is recommended that IgnoreUnknown be listed early in the configuration file as it will not be applied to unknown options that appear before it. This option may take one or two arguments, separated by whitespace.
If one argument is specified, it is used as the packet class unconditionally. If two values are specified, the first is automatically selected for interactive sessions and the second for non-interactive sessions. KbdInteractiveAuthentication Specifies whether to use keyboard-interactive authentication.
KbdInteractiveDevices Specifies the list of methods to use in keyboard-interactive authentication. Multiple method names must be comma-separated. The default is to use the server specified list. The methods available vary depending on what the server supports. Multiple algorithms must be comma-separated. The default is: curvesha libssh. The command string extends to the end of the line, and is executed with the user's shell. The command is run synchronously and does not have access to the session of the ssh 1 that spawned it.
It should not be used for interactive commands. This directive is ignored unless PermitLocalCommand has been enabled. LocalForward Specifies that a TCP port on the local machine be forwarded over the secure channel to the specified host and port from the remote machine. LogLevel Gives the verbosity level that is used when logging messages from ssh 1. The default is INFO. The MAC algorithm is used in protocol version 2 for data integrity protection.
For example, a Raspberry Pi running Ubuntu server. Again, the SSH server installation should be done on the system that you want to act as server and to which you want to connect remotely via SSH. Remember to update your Ubuntu system before installing new packages or software with to make sure that you are running the latest versions.
Once the downloading and installation of the package is done the SSH service should be already running, but to be sure we will check it with:. You should see something like this, with the word Active highlighted.
Hit q to return to the command prompt. If the firewall is active, it may prevent the connection to your SSH Server. Your local Linux system should already have SSH client installed. If not, you may always install it using the following command on Ubuntu:. To connect to your Ubuntu system you need to know the IP address of the computer and use the ssh command, like this:.
Change username to your actual user in the system and address to the IP address of your Ubuntu machine.
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