problem with S11 forwarding using ssh

Tue Apr 6 16:22:52 UTC 2010

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On Apr 6, 2010, at 11:10, "Margaret Doll" <Margaret_Doll at brown.edu>  
wrote:

> Bill,
>
>    Have  you  enabled "ssh -X" in /etc/ssh/sshd_config?
>
> X11Forwarding yes
>
>
> On Apr 6, 2010, at 9:57 AM, Tangren, Bill wrote:
>
>> This is a repost. The first post did not seem to arrive at the list.
>>
>> -----
>>
>> I am trying to ssh from a Mac OS client to a RHEL 4 server, fully
>> patched. It
>> appears that doing an "ssh -X" no longer works, while "ssh" alone
>> does.
>> This
>> is the debug info...
>>
>> $ ssh -X -vvv my.remote.ssh.server
>>
>> debug1: Reading configuration data /etc/ssh_config
>> debug2: ssh_connect: needpriv 0
>> debug1: Connecting to my.remote.ssh.server port 22.
>> debug1: Connection established.
>> debug1: identity file /Users/me/.ssh/identity type -1
>> debug1: identity file /Users/me/.ssh/id_rsa type -1
>> debug1: identity file /Users/me/.ssh/id_dsa type -1
>> debug1: Remote protocol version 2.0, remote software version
>> OpenSSH_3.9p1
>> debug1: match: OpenSSH_3.9p1 pat OpenSSH_3.*
>> debug1: Enabling compatibility mode for protocol 2.0
>> debug1: Local version string SSH-2.0-OpenSSH_5.2
>> debug2: fd 3 setting O_NONBLOCK
>> debug1: SSH2_MSG_KEXINIT sent
>> debug1: SSH2_MSG_KEXINIT received
>> debug2: kex_parse_kexinit:
>> 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
>> debug2: kex_parse_kexinit:
>> aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,
>> 3des-c
>> bc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-
>> cbc at l
>> ysator.liu.se
>> debug2: kex_parse_kexinit:
>> aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,
>> 3des-c
>> bc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-
>> cbc at l
>> ysator.liu.se
>> debug2: kex_parse_kexinit:
>> hmac-md5,hmac-sha1,umac-64 at openssh.com,hmac-ripemd160,hmac-
>> ripemd160 at ope
>> nssh.com,hmac-sha1-96,hmac-md5-96
>> debug2: kex_parse_kexinit:
>> hmac-md5,hmac-sha1,umac-64 at openssh.com,hmac-ripemd160,hmac-
>> ripemd160 at ope
>> nssh.com,hmac-sha1-96,hmac-md5-96
>> debug2: kex_parse_kexinit: none,zlib at openssh.com,zlib
>> debug2: kex_parse_kexinit: none,zlib at openssh.com,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-he
>> llman-group1-sha1
>> debug2: kex_parse_kexinit: ssh-rsa,ssh-dss
>> debug2: kex_parse_kexinit:
>> aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-
>> cbc,aes256-c
>> bc,rijndael-cbc at lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
>> debug2: kex_parse_kexinit:
>> aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-
>> cbc,aes256-c
>> bc,rijndael-cbc at lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
>> debug2: kex_parse_kexinit:
>> hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at openssh.com,hmac-
>> sha1-9
>> 6,hmac-md5-96
>> debug2: kex_parse_kexinit:
>> hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160 at openssh.com,hmac-
>> sha1-9
>> 6,hmac-md5-96
>> debug2: kex_parse_kexinit: none,zlib
>> debug2: kex_parse_kexinit: none,zlib
>> 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: kex: server->client aes128-ctr hmac-md5 none
>> debug2: mac_setup: found hmac-md5
>> 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: 128/256
>> debug2: bits set: 518/1024
>> debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
>> debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
>> debug3: check_host_in_hostfile: filename /Users/me/.ssh/known_hosts
>> debug3: check_host_in_hostfile: match line 2
>> debug3: check_host_in_hostfile: filename /Users/me/.ssh/known_hosts
>> debug3: check_host_in_hostfile: match line 2
>> debug1: Host my.remote.ssh.server' is known and matches the RSA host
>> key.
>> debug1: Found key in /Users/me/.ssh/known_hosts:2
>> debug2: bits set: 529/1024
>> 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: /Users/me/.ssh/identity (0x0)
>> debug2: key: /Users/me/.ssh/id_rsa (0x0)
>> debug2: key: /Users/me/.ssh/id_dsa (0x0)
>> debug3: input_userauth_banner
>> You are accessing ...
>>
>> debug1: Authentications that can continue:
>> publickey,gssapi-with-mic,password
>> debug3: start over, passed a different list
>> publickey,gssapi-with-mic,password
>> debug3: preferred publickey,keyboard-interactive,password
>> debug3: authmethod_lookup publickey
>> debug3: remaining preferred: keyboard-interactive,password
>> debug3: authmethod_is_enabled publickey
>> debug1: Next authentication method: publickey
>> debug1: Trying private key: /Users/me/.ssh/identity
>> debug3: no such identity: /Users/me/.ssh/identity
>> debug1: Trying private key: /Users/me/.ssh/id_rsa
>> debug3: no such identity: /Users/me/.ssh/id_rsa
>> debug1: Trying private key: /Users/me/.ssh/id_dsa
>> debug3: no such identity: /Users/me/.ssh/id_dsa
>> debug2: we did not send a packet, disable method
>> debug3: authmethod_lookup password
>> debug3: remaining preferred: ,password
>> debug3: authmethod_is_enabled password
>> debug1: Next authentication method: password me at my.remote.ssh.server
>> password:
>> debug3: packet_send2: adding 48 (len 70 padlen 10 extra_pad 64)
>> debug2: we sent a password packet, wait for reply
>> debug1: Authentication succeeded (password).
>> debug1: channel 0: new [client-session]
>> debug3: ssh_session2_open: channel_new: 0
>> debug2: channel 0: send open
>> debug1: Entering interactive session.
>> debug2: callback start
>> debug2: x11_get_proto: /usr/X11R6/bin/xauth -f
>> /tmp/ssh-nuslXLF8ZI/xauthfile
>> generate /tmp/launch-CmH9LX/:0
>> MIT-MAGIC-COOKIE-1 untrusted timeout 1200 2>/dev/null
>>
>> This is as far as it got before it failed. Can anyone tell me why?
>> Is it
>> maybe
>> having problems with writing to the /tmp directory?
>>
>> Something has changed recently. I was able to do this several months
>> ago, and
>> no configuration files have changed on the server. In the
>> /etc/ssh/sshd_config
>> file, I have set
>>
>> X11Forwarding yes
>> And just added
>> X11UseLocalhost No, but that didn't help.
>>
>> Any ideas?
>>
>>
>> -----
>> Bill Tangren
>>
>>
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