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ubuntu 14.04からX11を転送できない

私はubuntu 14.04からlanの別のubuntuマシンにsshトンネルを介してx11トラフィックを転送しようとしています.ssh -X [email protected]を使用してubuntu sshサーバーに接続しますが、opera

(opera:13046): Gtk-WARNING **: cannot open display:

sshd_configファイルでx11フォワーディングとtcpフォワーディングを有効にしましたが、同じことをデバッグするためにlocalhostに接続しても同じことです

ssh -X -v localhost

shady@shady:~$ opera

(opera:13046): Gtk-WARNING **: cannot open display:

理由がわかりません。lightdmがデフォルトでTCPをブロックするフォーラムで読んでいますが、gdmを使用しており、下のフラグを編集している

/etc/gdm/custom.conf

[セキュリティ]

DisallowTcp =フレス

私は今ほとんど失われているのを助けなかったし、自分でこれをトラブルシューティングするのに十分なスレッドがありません。

/ etc/ssh/sshd_config

# Package generated configuration file
# See the sshd_config(5) manpage for details

# What ports, IPs and protocols we listen for
Port 22
# Use these options to restrict which interfaces/protocols sshd will bind to
#ListenAddress ::
#ListenAddress 0.0.0.0
Protocol 2
# HostKeys for protocol version 2
HostKey /etc/ssh/ssh_Host_rsa_key
HostKey /etc/ssh/ssh_Host_dsa_key
HostKey /etc/ssh/ssh_Host_ecdsa_key
HostKey /etc/ssh/ssh_Host_ed25519_key
#Privilege Separation is turned on for security
UsePrivilegeSeparation yes

# Lifetime and size of ephemeral version 1 server key
KeyRegenerationInterval 3600
ServerKeyBits 1024

# Logging
SyslogFacility AUTH
LogLevel INFO

# Authentication:
LoginGraceTime 120
PermitRootLogin without-password
StrictModes yes

RSAAuthentication yes
PubkeyAuthentication yes
#AuthorizedKeysFile %h/.ssh/authorized_keys

# Don't read the user's ~/.rhosts and ~/.shosts files
IgnoreRhosts yes
# For this to work you will also need Host keys in /etc/ssh_known_hosts
RhostsRSAAuthentication no
# similar for protocol version 2
HostbasedAuthentication no
# Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication
#IgnoreUserKnownHosts yes

# To enable empty passwords, change to yes (NOT RECOMMENDED)
PermitEmptyPasswords no

# Change to yes to enable challenge-response passwords (beware issues with
# some PAM modules and threads)
ChallengeResponseAuthentication no

# Change to no to disable tunnelled clear text passwords
#PasswordAuthentication yes

# Kerberos options
#KerberosAuthentication no
#KerberosGetAFSToken no
#KerberosOrLocalPasswd yes
#KerberosTicketCleanup yes

# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes

X11Forwarding yes
X11DisplayOffset 10
PrintMotd no
PrintLastLog yes
TCPKeepAlive yes
#UseLogin no

#MaxStartups 10:30:60
#Banner /etc/issue.net

# Allow client to pass locale environment variables
AcceptEnv LANG LC_*

#Subsystem sftp /usr/lib/openssh/sftp-server

# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the ChallengeResponseAuthentication and
# PasswordAuthentication.  Depending on your PAM configuration,
# PAM authentication via ChallengeResponseAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and ChallengeResponseAuthentication to 'no'.
UsePAM yes
Subsystem sftp internal-sftp
Match group ftpaccess
ChrootDirectory %h
AllowTcpForwarding yes
ForceCommand internal-sftp

nologon chrootユーザーでsftpをセットアップしていますが、この問題には関係ないと思います

そして私がやったとき

ssh -X -v localhost

デバッグするには、この出力を示しました

shady@shady:~$ ssh -X -v localhost
OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug1: Connecting to localhost [127.0.0.1] port 22.
debug1: Connection established.
debug1: identity file /home/shady/.ssh/id_rsa type 1
debug1: identity file /home/shady/.ssh/id_rsa-cert type -1
debug1: identity file /home/shady/.ssh/id_dsa type -1
debug1: identity file /home/shady/.ssh/id_dsa-cert type -1
debug1: identity file /home/shady/.ssh/id_ecdsa type -1
debug1: identity file /home/shady/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/shady/.ssh/id_ed25519 type -1
debug1: identity file /home/shady/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3
debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3 pat OpenSSH_6.6.1* compat 0x04000000
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr [email protected] none
debug1: kex: client->server aes128-ctr [email protected] none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server Host key: ECDSA af:06:10:6a:e2:d2:bc:67:3b:48:e1:ca:ba:96:99:ca
debug1: Host 'localhost' is known and matches the ECDSA Host key.
debug1: Found key in /home/shady/.ssh/known_hosts:2
debug1: ssh_ecdsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/shady/.ssh/id_rsa
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /home/shady/.ssh/id_dsa
debug1: Trying private key: /home/shady/.ssh/id_ecdsa
debug1: Trying private key: /home/shady/.ssh/id_ed25519
debug1: Next authentication method: password
shady@localhost's password: 
debug1: Authentication succeeded (password).
Authenticated to localhost ([127.0.0.1]:22).
debug1: channel 0: new [client-session]
debug1: Requesting [email protected]
debug1: Entering interactive session.
debug1: Sending environment.
debug1: Sending env LANG = en_IN
Welcome to Ubuntu 14.04.3 LTS (GNU/Linux 3.13.0-74-generic x86_64)

 * Documentation:  https://help.ubuntu.com/

Last login: Fri Jan 15 02:37:54 2016 from 172.16.31.5
shady@shady:~$
networkingserversshxorgx11-forwarding
2
Shantanu Bedajna

これは私のような初心者にとって本当の問題であり、このウェブサイトにはこのトピックに関するスレッドがないことに驚いています、私はこの小さな構成のために私の人生の数時間を無駄にしましたただし、デフォルトではsshdはlocalhostでX11トラフィックのみをリッスンします。この行を追加することにより、ubuntu sshdデーモンがホストを受け入れるように明示的に指示する必要があります。

/ etc/ssh/sshd_config

X11UseLocalHost no

CentOSのssh構成からこのアイデアを得ましたが、ここではgdmなどを調整していましたが、ubuntuは公式のsshドキュメントでこれについて言及していませんでした。

4
Shantanu Bedajna