Slow ssh connectivity with Ubuntu

From Brandonhutchinson.com

Revision as of 20:03, 5 February 2008 by Hutch (Talk | contribs)
(diff) ←Older revision | Current revision (diff) | Newer revision→ (diff)
Jump to: navigation, search

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
Retrieved from "http://brandonhutchinson.com/wiki/Slow_ssh_connectivity_with_Ubuntu"
Personal tools