Introduce a custom OpenSSH client configuration file for IPFire.
Some people use it as a jumping host, so applying hardening options
system-wide improves security.
Cryptography setup is the same as for OpenSSH server configuration.
The second version of this patch re-adds some non-AEAD cipher suites
which are needed for connecting to older RHEL systems.
Partially fixes#11751
Signed-off-by: Peter Müller <peter.mueller@link38.eu>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
edea6ec5a4