Tramp ssh Authentication Problem.

[Ian Barton <lists@wilkesley.net>]

I am having some problems with Tramp logging in to remote servers. In
my ~/.ssh/config I have:

Host blacky.wilkesley.net
      IdentityFile ~/.ssh/id_rsa_blacky_linode
Host wilkesley.org
     IdentityFile ~/.ssh/id_rsa_linode_ian

I can login to  either host using ssh wilkesley.org or ssh
blacky.wilkesley.org. However, tramp logs in OK to wilkesley.org, but
*not* to blacky.wilkesley.net.

If I use the following minimal init file:

(setq tramp-shell-prompt-pattern "^[^$>\n]*[#$%>]*\\(\[[0-9;]*[a-zA-Z] 
*\\)*")
(eval-after-load 'tramp '(setenv "SHELL" "/bin/bash"))
(setq tramp-default-method "ssh")
(setq tramp-verbose 10)

I get the following in the Tramp log when I try to login to
blacky.wilkesley.net:

08:52:15.819432 tramp-process-one-action (5) # Looking for regexp 
"\(^.*\([pP]assword\|[pP]assphrase\).*:? *\)\'" from remote shell
08:52:15.819650 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.819878 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.820211 tramp-process-one-action (5) # Looking for regexp 
"\(^.*\(Connection \(?:\(?:clo\|refu\)sed\)\|Host key verification 
failed\.\|Login \(?:[Ii]ncorrect\)\|N\(?:ame or service not known\|o 
supported authentication methods left to try!\)\|Permission 
denied\|\(?:Sorry, try again\|Timeout, server not 
responding\)\.\).*\|^.*\(Received signal [0-9]+\).*\)\'" from remote shell
08:52:15.820469 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.820697 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.820936 tramp-process-one-action (5) # Looking for regexp "\(^[^#$%>
]*[#$%>] *\)\'" from remote shell
08:52:15.821198 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.821426 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.821635 tramp-process-one-action (5) # Looking for regexp "\(^[^$>
]*[#$%>]*\([[0-9;]*[a-zA-Z] *\)*\)\'" from remote shell
08:52:15.821866 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.822092 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.822339 tramp-process-one-action (5) # Looking for regexp 
"\(\(Are you sure you want to continue connecting (yes/no)\?\)\s-*\)\'" 
from remote shell
08:52:15.822574 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.822799 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.823010 tramp-process-one-action (5) # Looking for regexp 
"\(\(\(?:Store key in cache\? (y/\|Update cached key\? (y/n, Return 
cancels connectio\)n)\)\s-*\)\'" from remote shell
08:52:15.823245 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.823502 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.823690 tramp-process-one-action (5) # Looking for regexp 
"\(\(TERM = (.*)\|Terminal type\? \[.*\]\)\s-*\)\'" from remote shell
08:52:15.823906 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.824101 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.824277 tramp-process-one-action (5) # Looking for regexp 
"\(\)\'" from remote shell
08:52:15.824489 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.838558 tramp-get-connection-property (7) # check-remote-echo nil
08:52:15.838773 tramp-process-one-action (5) # Call 
`tramp-action-process-alive'
08:52:15.838968 tramp-accept-process-output (10) # *tramp/ssh 
blacky.wilkesley.net* run
08:52:16.757812 tramp-accept-process-output (10) #
#$ Last login: Sun Jun  8 08:51:51 2014 from 46.33.134.31
08:52:16.758055 tramp-process-one-action (5) # Looking for regexp 
"\(.*ogin\( .*\)?: *\)\'" from remote shell
08:52:16.758317 tramp-get-connection-property (7) # check-remote-echo nil
08:52:16.758556 tramp-get-connection-property (7) # check-remote-echo nil
08:52:16.758985 tramp-process-one-action (5) # Looking for regexp 
"\(^.*\([pP]assword\|[pP]assphrase\).*:? *\)\'" from remote shell
08:52:16.759223 tramp-get-connection-property (7) # check-remote-echo nil
08:52:16.759454 tramp-get-connection-property (7) # check-remote-echo nil
08:52:16.759688 tramp-process-one-action (5) # Looking for regexp 
"\(^.*\(Connection \(?:\(?:clo\|refu\)sed\)\|Host key verification 
failed\.\|Login \(?:[Ii]ncorrect\)\|N\(?:ame or service not known\|o 
supported authentication methods left to try!\)\|Permission 
denied\|\(?:Sorry, try again\|Timeout, server not 
responding\)\.\).*\|^.*\(Received signal [0-9]+\).*\)\'" from remote shell

For some reason it looks as thought the host key verification is
failing, but I can't see why.

Ian.