Re: gssapi-with-mic vs gssapi-keyex SSH authentication difference?

2014-10-31 Thread Nico Williams
GSS key exchange alone does not authenticate the client to the server because a binding of the GSS security context to the Diffie-Hellman or RSA key exchange is not sent by the client, only by the server. There is not much point to authenticating the client at this point anyways because GSS authen

Re: gssapi-with-mic vs gssapi-keyex SSH authentication difference?

2014-10-31 Thread Nico Williams
GSS keyex authenticates the server to the client. The client can then be authenticated to the server with it tries gssapi-keyex userauth. Nico -- Kerberos mailing list Kerberos@mit.edu https://mailman.mit.edu/mailman/listinfo/kerberos

Re: gssapi-with-mic vs gssapi-keyex SSH authentication difference?

2014-10-31 Thread Tomas Kuthan
On 10/31/14 18:38, Rufe Glick wrote: > Hello, > > I have Kerberos infrastructure set up and GSSAPI enabled in > ssh_config/sshd_config of the SSH client/server (GSSAPIAuthentication yes). > When I connect to the SSH server using verbose mode I see that SSH client > uses 'gssapi-with-mic' mode to

Re: gssapi-with-mic vs gssapi-keyex SSH authentication difference?

2014-10-31 Thread Greg Hudson
On 10/31/2014 01:52 PM, Benjamin Kaduk wrote: > gssapi-keyex is not a way for the client to authenticate to the server; it > replaces the normal key exchange step that uses the server's > ssh_host_{ecdsa,rsa,dsa}_keys. If memory serves, the gssapi-keyex key exchange actually authenticates both par

Re: gssapi-with-mic vs gssapi-keyex SSH authentication difference?

2014-10-31 Thread Benjamin Kaduk
On Fri, 31 Oct 2014, Rufe Glick wrote: > Hello, > > I have Kerberos infrastructure set up and GSSAPI enabled in > ssh_config/sshd_config of the SSH client/server (GSSAPIAuthentication > yes). When I connect to the SSH server using verbose mode I see that SSH > client uses 'gssapi-with-mic' mode to

gssapi-with-mic vs gssapi-keyex SSH authentication difference?

2014-10-31 Thread Rufe Glick
Hello, I have Kerberos infrastructure set up and GSSAPI enabled in ssh_config/sshd_config of the SSH client/server (GSSAPIAuthentication yes). When I connect to the SSH server using verbose mode I see that SSH client uses 'gssapi-with-mic' mode to authenticate itself. Then if I additionally ena