Slow ssh connectivity with Ubuntu - Revision history

Hutch at 20:10, 5 February 2008

2008-02-05T20:10:24Z

←Older revision		Revision as of 20:10, 5 February 2008
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	...		...

-	As a workaround, disable ''GSSAPIAuthentication'' in the ssh 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).

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

Hutch at 20:09, 5 February 2008

2008-02-05T20:09:20Z

←Older revision		Revision as of 20:09, 5 February 2008
Line 15:		Line 15:

	As a workaround, disable ''GSSAPIAuthentication'' in the ssh client-side configuration.		As a workaround, disable ''GSSAPIAuthentication'' in the ssh client-side configuration.
-	* ''/etc/ssh/ssh_config'' is the ssh client-side configuration file for all users
-	* ''~/.ssh/config'' is the per-user ssh client-side configuration file

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

Hutch at 20:08, 5 February 2008

2008-02-05T20:08:26Z

←Older revision		Revision as of 20:08, 5 February 2008
Line 15:		Line 15:

	As a workaround, disable ''GSSAPIAuthentication'' in the ssh client-side configuration.		As a workaround, disable ''GSSAPIAuthentication'' in the ssh client-side configuration.
-	* ''/etc/ssh/ssh_config'' is the ssh client-side configuration file for all users.	+	* ''/etc/ssh/ssh_config'' is the ssh client-side configuration file for all users
-	* ''~/.ssh/config'' is the per-user ssh client-side configuration file.	+	* ''~/.ssh/config'' is the per-user ssh client-side configuration file

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

Hutch at 20:08, 5 February 2008

2008-02-05T20:08:12Z

←Older revision		Revision as of 20:08, 5 February 2008
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'' is the ssh client-side configuration file for all users.		* ''/etc/ssh/ssh_config'' is the ssh client-side configuration file for all users.
	* ''~/.ssh/config'' is the per-user ssh client-side configuration file.		* ''~/.ssh/config'' is the per-user ssh client-side configuration file.

Hutch at 20:07, 5 February 2008

2008-02-05T20:07:53Z

←Older revision		Revision as of 20:07, 5 February 2008
Line 15:		Line 15:

	As a workaround, disable ''GSSAPIAuthentication'' in the client-side configuration.		As a workaround, disable ''GSSAPIAuthentication'' in the client-side configuration.
-	* ''/etc/ssh/ssh_config'' for all users~~, or~~	+	* ''/etc/ssh/ssh_config'' is the ssh client-side configuration file for all users.
-	* ''~/.ssh/config'' ~~for only your account~~.	+	* ''~/.ssh/config'' is the per-user ssh client-side configuration file.

		+	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'''

Hutch at 20:06, 5 February 2008

2008-02-05T20:06:22Z

←Older revision		Revision as of 20:06, 5 February 2008
Line 19:		Line 19:

	$ '''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'''
-
-	=== Configuration ===
-	$ '''cat /etc/lsb-release'''
-	DISTRIB_ID=Ubuntu
-	DISTRIB_RELEASE=7.10
-	DISTRIB_CODENAME=gutsy
-	DISTRIB_DESCRIPTION="Ubuntu 7.10"
-
-	$ '''ssh -V'''
-	OpenSSH_4.6p1 Debian-5ubuntu0.1, OpenSSL 0.9.8e 23 Feb 2007

Hutch at 20:06, 5 February 2008

2008-02-05T20:06:09Z

←Older revision		Revision as of 20:06, 5 February 2008
Line 19:		Line 19:

	$ '''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'''
-		+
	=== Configuration ===		=== Configuration ===
	$ '''cat /etc/lsb-release'''		$ '''cat /etc/lsb-release'''

Hutch at 20:05, 5 February 2008

2008-02-05T20:05:51Z

←Older revision		Revision as of 20:05, 5 February 2008
Line 1:		Line 1:
-	~~Connecting~~ to certain hosts using ''ssh'' takes approximately 15 seconds. The culprit appears to be "Unspecified GSS failures".	+	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'''''		$ '''ssh -v ''host'''''
	...		...
Line 26:		Line 27:
	DISTRIB_DESCRIPTION="Ubuntu 7.10"		DISTRIB_DESCRIPTION="Ubuntu 7.10"

-	$ ssh -V	+	$ '''ssh -V'''
	OpenSSH_4.6p1 Debian-5ubuntu0.1, OpenSSL 0.9.8e 23 Feb 2007		OpenSSH_4.6p1 Debian-5ubuntu0.1, OpenSSL 0.9.8e 23 Feb 2007

Hutch: New page: Connecting to certain hosts using ''ssh'' takes approximately 15 seconds. The culprit appears to be "Unspecified GSS failures". $ '''ssh -v ''host''''' ... debug1: Authentications that ...

2008-02-05T20:03:56Z

New page: Connecting to certain hosts using ''ssh'' takes approximately 15 seconds. The culprit appears to be "Unspecified GSS failures". $ '''ssh -v ''host''''' ... debug1: Authentications that ...

New page

Connecting to certain hosts using ''ssh'' takes approximately 15 seconds. The culprit appears to be "Unspecified GSS failures".
$ '''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 client-side configuration.
* ''/etc/ssh/ssh_config'' for all users, or
* ''~/.ssh/config'' for only your account.

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

=== Configuration ===
$ '''cat /etc/lsb-release'''
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=7.10
DISTRIB_CODENAME=gutsy
DISTRIB_DESCRIPTION="Ubuntu 7.10"

$ ssh -V
OpenSSH_4.6p1 Debian-5ubuntu0.1, OpenSSL 0.9.8e 23 Feb 2007