Re: [gt-user] gsissh: Permission denied (publickey, gssapi-with-mic)

Thu, 25 Mar 2010 16:53:27 -0700

The issue ended up being that I wrongly assumed that the SSH server was setup from GSI OpenSSH. I followed the instructions to setup the server, configured it to only allow GSSAPI authentication, and verified that I can connect successfully. 

Thank you both for your help and patience!

Lukasz Lacinski wrote:

On Mar 24, 2010, at 4:55 PM, David Smith wrote:


Greetings,

I am having an issue connecting between one of my Globus clients and my GridFTP 
server using gsissh.  Both are GT v5.0.0 - the client is running Debian 5.0.3 
and the server is running CentOS 5.2, both 64-bit.

I've attached the verbose output of the command at the bottom of the message.  
What is peculiar about this failure is that:

1) I have a valid myproxy certificate in /tmp
2) I can successfully transfer files from the client to the server using 
globus-url-copy
3) I can connect from the client to the server over ssh using publickey 
authentication
4) A globus client on another machine can connect to the same server using 
gsissh


Are you sure that you do not use public-key authentication in this case? Can 
you connect to the server if grid-proxy-info shows that you do not have a valid 
credential?

Lukasz


5) The client's ssh_config has GSSAPIAuthentication and 
GSSAPIDelegateCredentials set to yes

The failing client was compiled from source using the following commands:

# ./configure --prefix=/usr/local/globus-5.0.0 --with-gsi-opensshargs="--with-pam 
--with-md5-passwords --with-tcp-wrappers --with-mic"
# make gsi-myproxy gsi-openssh globus-data-management-client
# make install

There seems to be something misconfigured on the failing client, since the 
server is working properly with another client.  Can anyone tell from the 
verbose message why the gsissh authentication is denied, or suggest anything 
else I should take a look at to further investigate the problem?

Thank you for your help!

OpenSSH_5.2p1-hpn13v6 GLOBUS_GSSAPI_GPT_4.7 GSI, OpenSSL 0.9.8g 19 Oct 2007
debug1: Reading configuration data /usr/local/globus-5.0.0/etc/ssh/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to chi-vm-4 [128.9.136.106] port 22.
debug1: Connection established.
debug1: identity file /home/smithd/.ssh/id_rsa type -1
debug3: Not a RSA1 key file /home/smithd/.ssh/id_dsa.
debug2: key_type_from_name: unknown key type '-----BEGIN'
debug3: key_read: missing keytype
debug2: key_type_from_name: unknown key type 'Proc-Type:'
debug3: key_read: missing keytype
debug2: key_type_from_name: unknown key type 'DEK-Info:'
debug3: key_read: missing keytype
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug3: key_read: missing whitespace
debug2: key_type_from_name: unknown key type '-----END'
debug3: key_read: missing keytype
debug1: identity file /home/smithd/.ssh/id_dsa type 2
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3
debug1: match: OpenSSH_4.3 pat OpenSSH_4*
debug1: Remote is NON-HPN aware
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.2p1-hpn13v6 
GLOBUS_GSSAPI_GPT_4.7 GSI
debug2: fd 3 setting O_NONBLOCK
debug3: Trying to reverse map address 128.9.136.106.
debug1: Offering GSSAPI proposal: 
gss-gex-sha1-dZuIebMjgUqaxvbF7hDbAw==,gss-group1-sha1-dZuIebMjgUqaxvbF7hDbAw==,gss-group14-sha1-dZuIebMjgUqaxvbF7hDbAw==
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: AUTH STATE IS 0
debug2: kex_parse_kexinit: 
gss-gex-sha1-dZuIebMjgUqaxvbF7hDbAw==,gss-group1-sha1-dZuIebMjgUqaxvbF7hDbAw==,gss-group14-sha1-dZuIebMjgUqaxvbF7hDbAw==,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,null
debug2: kex_parse_kexinit: 
aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: 
aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit: 
hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: 
hmac-md5,hmac-sha1,[email protected],hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: kex_parse_kexinit: 
diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: 
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,[email protected],aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: 
aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,[email protected],aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit: 
hmac-md5,hmac-sha1,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: 
hmac-md5,hmac-sha1,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit:
debug2: kex_parse_kexinit: first_kex_follows 0
debug2: kex_parse_kexinit: reserved 0
debug2: mac_setup: found hmac-md5
debug1: REQUESTED ENC.NAME is 'aes128-ctr'
debug1: kex: server->client aes128-ctr hmac-md5 none
debug2: mac_setup: found hmac-md5
debug1: REQUESTED ENC.NAME is 'aes128-ctr'
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug2: dh_gen_key: priv key bits set: 137/256
debug2: bits set: 493/1024
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: check_host_in_hostfile: filename /home/smithd/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 1
debug3: check_host_in_hostfile: filename /home/smithd/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 2
debug1: Host 'chi-vm-4' is known and matches the RSA host key.
debug1: Found key in /home/smithd/.ssh/known_hosts:1
debug2: bits set: 510/1024
debug1: ssh_rsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug2: key: /home/smithd/.ssh/id_rsa ((nil))
debug2: key: /home/smithd/.ssh/id_dsa (0x760860)
debug1: Authentications that can continue: publickey,gssapi-with-mic
debug3: start over, passed a different list publickey,gssapi-with-mic
debug3: preferred gssapi-keyex,external-keyx,gssapi-with-mic,gssapi
debug3: authmethod_lookup gssapi-with-mic
debug3: remaining preferred: gssapi
debug3: authmethod_is_enabled gssapi-with-mic
debug1: Next authentication method: gssapi-with-mic
debug2: we sent a gssapi-with-mic packet, wait for reply
debug1: Authentications that can continue: publickey,gssapi-with-mic
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
Permission denied (publickey,gssapi-with-mic).

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