-4Forces ssh to use IPv4 addresses only.| man.openbsd.org
-4Forces sftp to use IPv4 addresses only.-6Forces sftp to use IPv6 addresses only.-AAllows forwarding of| man.openbsd.org
OpenSSH post quantum cryptography| www.openssh.com
OpenSSH release notes| www.openssh.com
AcceptEnvSpecifies what environment variables sent by the client will be copied| man.openbsd.org
-4Forces ssh to use IPv4 addresses only.| man.openbsd.org