How to Set Up Host-Based Authentication for Secure Shell

1. Ssh_host_dsa_key
2. Ssh Update Host Key
3. Generate Ssh_host_dsa_key Address
4. Regenerate Ssh_host_dsa_key
5. Generate Ssh_host_dsa_key.pub

Ssh_host_dsa_key

The following procedure sets up a public key system where the client's public key is used forauthentication on the server. The user must also create a public/private key pair.

• How to Set Up Host-Based Authentication for Secure Shell. The following procedure sets up a public key system where the client's public key is used for authentication on the server. The user must also create a public/private key pair. In the procedure, the terms client and local host refer to the system where a user types the ssh command.
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• How to regenerate new ssh server keys This is an unusual topic since most distribution create these keys for you during the installation of the OpenSSH server package. But it may be useful to be able generate new server keys from time to time, this happen to me when I duplicate Virtual Private Server which contains an installed ssh package.

Ssh Update Host Key

In the procedure, the terms client and local hostrefer to the system where a user types the ssh command. The termsserver and remote host refer to the system that the clientis trying to reach.

When you are done, you have performed setup for server authentication in which keys will be stored in UNIX files. Each time the host keys are regenerated, they must be redistributed and added to the key ring of the remote system. Figure 1 shows how the knownhosts file is created when keys are stored in UNIX files. Oct 29, 2012  It can create RSA keys for use by SSH protocol version 1 and RSA or DSA keys for use by SSH protocol version 2. He type of key to be generated is specified with the -t option. If invoked without any arguments, ssh-keygen will generate an RSA key for use in SSH protocol 2 connections. The -f option specifies the filename of the key file.

Before You Begin

You must assume the root role. For more information, see Using Your Assigned Administrative Rights in Securing Users and Processes in Oracle Solaris 11.2.

Generate Ssh_host_dsa_key Address

1. On the client, enable host-based authentication.

   In the client configuration file, /etc/ssh/ssh_config, type the followingentry:

   Sims 2 pets cd key generator. For the syntax of the file, see the ssh_config(4) man page.

2. On the server, enable host-based authentication.

   In the server configuration file, /etc/ssh/sshd_config, type the sameentry:

   For the syntax of the file, see the sshd_config(4) man page.

3. On the server, either you or the user should configure a file that enables the client to be recognized as a trusted host.

   For more information, see the FILES section of the sshd(1M) man page.

   • If you are doing the configuration, add the client as an entry to the server's /etc/ssh/shosts.equiv file.
   • If your users are doing the configuration, they should add an entry for the client to their ~/.shosts file on the server.
4. On the server, ensure that the sshd daemon can access the list of trustedhosts.

   Set IgnoreRhosts to no in the/etc/ssh/sshd_config file.

5. Ensure that users of Secure Shell at your site have accounts on both hosts.
6. Put the client's public key on the server using one of the following methods:
   • Modify the sshd_config file on the server, then instruct your users to addthe client's public host keys to their ~/.ssh/known_hosts file.

     For user instructions, see How to Generate aPublic/Private Key Pair for Use With Secure Shell.

   • Copy the client's public key to the server.

     The host keys are stored in the /etc/ssh directory. The keys aretypically generated by the sshd daemon on first boot.

     1. Add the key to the /etc/ssh/ssh_known_hosts file on the server.

        On the client, type the following command on one line with no backslash.

        Note - If host keys are missing from the server, using Secure Shell generates an error messagesimilar to the following:
     2. When you are prompted, supply your login password.

        When the file is copied, the message “Host key copied” is displayed.

        Each line in the /etc/ssh/ssh_known_hosts file consists of fields thatare separated by spaces:

     3. Edit the /etc/ssh/ssh_known_hosts file and addRemoteHost as the first field in the copied entry.

Regenerate Ssh_host_dsa_key

Generate Ssh_host_dsa_key.pub

In the following example, each host is configured as a server and as a client. A user oneither host can initiate an ssh connection to the other host. The followingconfiguration makes each host a server and a client:

• On each host, the Secure Shell configuration files contain the following entries:

• On each host, the shosts.equiv file contains an entry for the otherhost:

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• The public key for each host is in the /etc/ssh/ssh_known_hosts file onthe other host:

• Users have an account on both hosts. For example, the following information would appear for user John Doe: