Slow ssh connectivity with Ubuntu

From Brandonhutchinson.com

(Difference between revisions)
Jump to: navigation, search
Current revision (20:10, 5 February 2008) (edit) (undo)
 
(4 intermediate revisions not shown.)
Line 14: Line 14:
...
...
-
As a workaround, disable ''GSSAPIAuthentication'' in the client-side configuration.
+
As a workaround, disable ''GSSAPIAuthentication'' in the ssh client-side configuration (''/etc/ssh/ssh_config'' for all users, ''~/.ssh/config'' for an individual user).
-
* ''/etc/ssh/ssh_config'' for all users, or
+
-
* ''~/.ssh/config'' for only your account.
+
 +
e.g., modifying ''/etc/ssh/ssh_config''
$ '''sudo perl -p -i.$(date +%Y%m%d) -e '/^#/ or s/GSSAPIAuthentication yes/GSSAPIAuthentication no/' /etc/ssh/ssh_config'''
$ '''sudo perl -p -i.$(date +%Y%m%d) -e '/^#/ or s/GSSAPIAuthentication yes/GSSAPIAuthentication no/' /etc/ssh/ssh_config'''

Current revision

On my Ubuntu 7.10 system, connecting to certain hosts using ssh takes approximately 15 seconds. The culprit appears to be "Unspecified GSS failures" using GSSAPIAuthentication.

$ ssh -v host
...
debug1: Authentications that can continue: publickey,gssapi-with-mic,password,hostbased
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure.  Minor code may provide more information
No credentials cache found 

debug1: Unspecified GSS failure.  Minor code may provide more information
No credentials cache found 

debug1: Unspecified GSS failure.  Minor code may provide more information
...

As a workaround, disable GSSAPIAuthentication in the ssh client-side configuration (/etc/ssh/ssh_config for all users, ~/.ssh/config for an individual user).

e.g., modifying /etc/ssh/ssh_config

$ sudo perl -p -i.$(date +%Y%m%d) -e '/^#/ or s/GSSAPIAuthentication yes/GSSAPIAuthentication no/' /etc/ssh/ssh_config
Personal tools