How to trust CA-signed host keys in PuTTY?

I have something like this in ~/.ssh/known_hosts on my Linux machine:

@cert-authority * ssh-rsa pubkeypubkeypubkey

And any server with a signed host key is automatically trusted by the OpenSSH client.

I regularly use PuTTY on my Windows PC. How do I achieve something similar?

Solution 1:

CA certificate authentication as implemented by OpenSSH is not supported by PuTTY (yet).

No evidence of such a feature is found in the current ChangeLog and as a feature request it is also still listed as open on the PuTTY WishList