avoiding 'authenticity' prompt

Damien Miller djm at mindrot.org
Sun Nov 14 21:03:03 EST 2004


Dan Kaminsky wrote:
> And of course, all these options can be thrown in /etc/ssh_config .
> 
> What's the present status of putting SSH host keys in DNS, btw?  Anyone 
> know?

Dan, you should know how to read manpages and use google better
than most :)

The RR type is assigned and support has been in OpenSSH since
3.7p1 (IIRC). Bind 9 has had support for the RR type for quite a
while too. For full support you really need DNSSEC, though results
will be displayed without it.

ssh-keygen can convert from host pubkeys into SSHFP records using the
-r option. "dig baragon.mindrot.org any" for an example. Checking is
enabled using the "VerifyHostKeyDNS" ssh option. See README.DNS for
details.

It works well in practice using my DNSSEC test domain.

-d




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