Slow ssh connectivity with Ubuntu
From Brandonhutchinson.com
(Difference between revisions)
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$ '''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''' | ||
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=== Configuration === | === Configuration === | ||
$ '''cat /etc/lsb-release''' | $ '''cat /etc/lsb-release''' | ||
Revision as of 20:06, 5 February 2008
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 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
