problem with S11 forwarding using ssh

Tue Apr 6 18:41:04 UTC 2010

> -----Original Message-----
> From: redhat-list-bounces at redhat.com [mailto:redhat-list-
> bounces at redhat.com] On Behalf Of Margaret Doll
> Sent: Tuesday, April 06, 2010 12:06 PM
> To: General Red Hat Linux discussion list
> Subject: Re: problem with S11 forwarding using ssh
> 
> Bill,
> 
> 	Have  you  enabled "ssh -X" in /etc/ssh/sshd_config?
> 
> X11Forwarding yes

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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