+\S{config-ssh-noauth} \q{Bypass authentication entirely}
+
+\cfg{winhelp-topic}{ssh.auth.bypass}
+
+In SSH-2, it is in principle possible to establish a connection
+without using SSH's mechanisms to identify or prove who you are
+to the server. An SSH server could prefer to handle authentication
+in the data channel, for instance, or simply require no user
+authentication whatsoever.
+
+By default, PuTTY assumes the server requires authentication (we've
+never heard of one that doesn't), and thus must start this process
+with a username. If you find you are getting username prompts that
+you cannot answer, you could try enabling this option. However,
+most SSH servers will reject this.
+
+This is not the option you want if you have a username and just want
+PuTTY to remember it; for that see \k{config-username}.
+It's also probably not what if you're trying to set up passwordless
+login to a mainstream SSH server; depending on the server, you
+probably wanted public-key authentication (\k{pubkey})
+or perhaps GSSAPI authentication (\k{config-ssh-auth-gssapi}).
+(These are still forms of authentication, even if you don't have to
+interact with them.)
+
+This option only affects SSH-2 connections. SSH-1 connections always
+require an authentication step.
+