Question

我正在尝试在ssh服务器上设置本地到本地端口转发。我的目标是将本地端口12345转发到同一本地计算机上的端口22。不过，我得到connection refused。

这是我正在运行的：

me@myHost:~$ ssh -L 12345:localhost:22 10.1.1.6
[...]
Authenticated to 10.1.1.6 ([10.1.1.6]:22).
debug1: Local connections to LOCALHOST:12345 forwarded to remote address 127.0.0.1:22
debug1: Local forwarding listening on ::1 port 12345.
debug1: channel 0: new [port listener]
debug1: Local forwarding listening on 127.0.0.1 port 12345.
debug1: channel 1: new [port listener]
debug1: channel 2: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: Sending environment.
debug1: Sending env LANG = en_US.UTF-8

me@remoteHost:~$ ssh localhost -p 12345
ssh: connect to host localhost port 12345: Connection refused

me@remoteHost:~$ nc -v localhost 12345
nc: connect to localhost port 12345 (tcp) failed: Connection refused
nc: connect to localhost port 12345 (tcp) failed: Connection refused

debug1: Connection to port 12345 forwarding to localhost port 22 requested.
debug1: channel 3: new [direct-tcpip]
debug1: channel 3: free: direct-tcpip: listening port 12345 for localhost port 22, connect from ::1 port 59785 to ::1 port 12345, nchannels 4

它根本不起作用，这很奇怪，因为我已经设法在本地机器上使用完全相同的命令序列。

这是我在远程服务器上的清单。谷歌在搜索问题时调查了几个不同的东西：

（1）netstat输出：

root@remoteServer:~# netstat -tpln
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      12791/sshd      
tcp6       0      0 :::22                   :::*                    LISTEN      12791/sshd

（2）/etc/hosts.allow和/etc/hosts.deny个文件：空

（3）配置文件：与本地计算机上的完全相同。我删除了几条注释行以保持简短。

root@remoteHost:~# cat /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 yes
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

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

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

Subsystem sftp /usr/lib/openssh/sftp-server
UsePAM yes

第二个：

root@remoteHost:~# cat /etc/ssh/ssh_config 

Host *
SendEnv LANG LC_*
HashKnownHosts yes
GSSAPIAuthentication yes
GSSAPIDelegateCredentials no

最后，在-L标记中我使用了localhost，[::1]，10.1.1.6（可路由的IP），127.0.0.1，都无济于事。

Answer 1

问题解决了。这是我自己的错，我把本地端口转发-L与远程端口转发-R完全混淆了。因此，首先没有问题。

我在写作时想通了：

me@myHost:~$ ssh -L 12345:localhost:22 10.1.1.6

12345的本地端口myHost被转发到 10.1.1.6，然后远程主机将其转发到10.1.1.6:22。< / p>

因此，输入me@remoteHost:~$ ssh localhost -p 12345显然什么都不做，但输入me@myHost:~$ ssh localhost -p 12345会启动ssh连接，因为myHost:12345最终会转发到remoteHost:22。

ssh本地端口到本地端口转发;拒绝连接

1 个答案: