Red Hat Bugzilla – Bug 475996
Avahi should export public key for SSH service
Last modified: 2010-06-28 06:56:18 EDT
Avahi should set the TXT record for the SSH service it exports to include the public key of the SSH server (in a manner compatible with MacOS X, which does the same thing).
Uh. This is not the appropriate place to report this.
To do this properly we should patch OpenSSH to do the Avahi registration itself. But I fear the OpenSSH would not be willing to merge such a patch. Right now we do mDNS/DNS-SD publishing of the SSH service by dropping a static service definition file in /etc/avahi. It's just an xml file. Including the SSH server key in that file automatically is not really possible.
I am reassigning this now to ssh, let's see what the ssh maintainers have to say about this.
I don't know much about the potential avahi registration code, that means what dependencies it would bring to openssh and so on.
But I am really afraid this code would not be accepted upstream especially if some of the dependencies would be GPL licensed.
It would pull in libavahi-client which is LGPL. la-c pulls in D-Bus. Which is GPL & Academic.
Also, that dependency would be completely optional.
I'd expect a refusal however due to more fundamental issues. i.e. mDNS/DNS-SD is this unreliable, untrusted protocol that is used to spam the local network about the existance of a service. Security people tend to stay away from technology like that and normally don't see the usefulness of this.
Yes, i know, I am not selling this very well right now.... Let's hope I am mistaken.
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
This bug appears to have been reported against 'rawhide' during the Fedora 11 development cycle.
Changing version to '11'.
More information and reason for this action is here:
This bug already has been fixed by static avahi registration.
Not sure what you mean by that, but key certainly isn't exported using openssh-5.2p1-28.fc12.x86_64:
$ avahi-browse -ar
= eth0 IPv4 cookie SSH Remote Terminal local
hostname = [cookie.local]
address = [192.168.1.140]
port = 
txt = 
It is exactly the same as MacOS exported.
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This may or may not be a part of the avahi code, but it can't be done in openssh. There are no means to provide it.
Fedora 11 changed to end-of-life (EOL) status on 2010-06-25. Fedora 11 is
no longer maintained, which means that it will not receive any further
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Thank you for reporting this bug and we are sorry it could not be fixed.