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authorSimon Wilkinson <simon@sxw.org.uk>2014-02-09 16:09:48 +0000
committerColin Watson <cjwatson@debian.org>2017-03-29 01:38:38 +0100
commitd51c7ac3328464dec21514fb398ab5c140a0664f (patch)
tree4f1a2aa08e99303f62c71cba0b38899f050d1b3d /ssh_config.5
parent6fabaf6fd9b07cc8bc6a17c9c4a5b76849cfc874 (diff)
GSSAPI key exchange support
This patch has been rejected upstream: "None of the OpenSSH developers are in favour of adding this, and this situation has not changed for several years. This is not a slight on Simon's patch, which is of fine quality, but just that a) we don't trust GSSAPI implementations that much and b) we don't like adding new KEX since they are pre-auth attack surface. This one is particularly scary, since it requires hooks out to typically root-owned system resources." However, quite a lot of people rely on this in Debian, and it's better to have it merged into the main openssh package rather than having separate -krb5 packages (as we used to have). It seems to have a generally good security history. Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1242 Last-Updated: 2017-01-16 Patch-Name: gssapi.patch
Diffstat (limited to 'ssh_config.5')
-rw-r--r--ssh_config.532
1 files changed, 32 insertions, 0 deletions
diff --git a/ssh_config.5 b/ssh_config.5
index 532745b2f..ec60273ea 100644
--- a/ssh_config.5
+++ b/ssh_config.5
@@ -752,10 +752,42 @@ The default is
752Specifies whether user authentication based on GSSAPI is allowed. 752Specifies whether user authentication based on GSSAPI is allowed.
753The default is 753The default is
754.Cm no . 754.Cm no .
755.It Cm GSSAPIKeyExchange
756Specifies whether key exchange based on GSSAPI may be used. When using
757GSSAPI key exchange the server need not have a host key.
758The default is
759.Cm no .
760.It Cm GSSAPIClientIdentity
761If set, specifies the GSSAPI client identity that ssh should use when
762connecting to the server. The default is unset, which means that the default
763identity will be used.
764.It Cm GSSAPIServerIdentity
765If set, specifies the GSSAPI server identity that ssh should expect when
766connecting to the server. The default is unset, which means that the
767expected GSSAPI server identity will be determined from the target
768hostname.
755.It Cm GSSAPIDelegateCredentials 769.It Cm GSSAPIDelegateCredentials
756Forward (delegate) credentials to the server. 770Forward (delegate) credentials to the server.
757The default is 771The default is
758.Cm no . 772.Cm no .
773.It Cm GSSAPIRenewalForcesRekey
774If set to
775.Cm yes
776then renewal of the client's GSSAPI credentials will force the rekeying of the
777ssh connection. With a compatible server, this can delegate the renewed
778credentials to a session on the server.
779The default is
780.Cm no .
781.It Cm GSSAPITrustDns
782Set to
783.Cm yes
784to indicate that the DNS is trusted to securely canonicalize
785the name of the host being connected to. If
786.Cm no ,
787the hostname entered on the
788command line will be passed untouched to the GSSAPI library.
789The default is
790.Cm no .
759.It Cm HashKnownHosts 791.It Cm HashKnownHosts
760Indicates that 792Indicates that
761.Xr ssh 1 793.Xr ssh 1