![]() To allow specific key type algorithms in the sshd server, use the HostKeyAlgorithms option in /etc/ssh/sshd_config. Even if the server has a DSA key file and that key file is referenced by the HostKey option, it will not be used unless the ssh-dss algorithm is present in the HostKeyAlgorithms list. HostKeyAlgorithms specifies the key type algorithms offered by the server or accepted by the client. There are two separate settings that control the use of key types. In OpenSSH 7.1 and higher, DSA key types are no longer allowed by default. The order of key exchange algorithms in the list determines their preference, with the highest preference at the beginning.The algorithms in the "KexAlgorithms" option are separated by commas without spaces.The "KexAlgorithms" option is a single line. This is the complete list of key exchange algorithms supported by OpenSSH as of version 7.5.102.2000. To allow specific key exchange algorithms in the ssh client, use the same KexAlgorithms option but instead set it in either the global /etc/ssh/ssh_config file or each user's individual $HOME/.ssh/config file. Examples: KexAlgorithms KexAlgorithms +diffie-hellman-group1-sha1 You can specify a list of allowed key exchange algorithms or add individual algorithms with the "+" option. To allow specific key exchange algorithms in the sshd server, use the KexAlgorithms option in /etc/ssh/sshd_config. If the client does not support other key exchange algorithms, the connection will fail with the message "no matching key exchange method found." In OpenSSH 7.1 and higher, the Diffie-Hellman Group 1 SHA1 algorithm is no longer allowed by default. There is a bug in OpenSSH 7.1 (7.1.102.1100) that prevents the "+" option from working it is fixed in OpenSSH 7.5 (7.5.102.1100).The order of ciphers in the list determines their preference, with the highest preference at the beginning. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |