ssh_exchange_identification: Connection closed by remote host 问题的解决

今天，在win7下安装了Cygwin并安装了openssh, 在cygwin下配置并启动sshd，启动成功，但是（ssh localhost）连接时出现：

ssh_exchange_identification: Connection closed by remote host 

试着访问 ssh 127.0.0.1 也不行，但是访问主机名可以--- ssh 主机名

分析：

在/etc/下发现一文件：hosts

$ vi hosts    ---------打开内容如下:

# Copyright (c) 1993-2009 Microsoft Corp.

#

# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.

#

# This file contains the mappings of IP addresses to host names. Each

# entry should be kept on an individual line. The IP address should

# be placed in the first column followed by the corresponding host name.

# The IP address and the host name should be separated by at least one

# space.

#

# Additionally, comments (such as these) may be inserted on individual

# lines or following the machine name denoted by a '#' symbol.

#

# For example:

#

#      102.54.94.97     rhino.acme.com          # source server

#       38.25.63.10     x.acme.com              # x client host

# localhost name resolution is handled within DNS itself.

# ::1             localhost

127.0.0.1        localhost

#123.129.242.169   hub5idx.shub.sandai.net

#58.254.134.233   hub5pr.sandai.net 

仔细一看，和 C:/Windows/System32/drivers/etc/中的hosts 文件一摸一样

这个文件在win7下 被我修改过 ，原来问题在这。

最简单的解决方案：

到 C:/Windows/System32/drivers/etc/ 下 修改（记事本修改，其他工具修改后无法保存，cygwin中的/etc/下的hosts--是修改不了的），把所有行全部注销。

重启sshd, ok！

# Copyright (c) 1993-2009 Microsoft Corp.

#

# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.

#

# This file contains the mappings of IP addresses to host names. Each

# entry should be kept on an individual line. The IP address should

# be placed in the first column followed by the corresponding host name.

# The IP address and the host name should be separated by at least one

# space.

#

# Additionally, comments (such as these) may be inserted on individual

# lines or following the machine name denoted by a '#' symbol.

#

# For example:

#

#      102.54.94.97     rhino.acme.com          # source server

#       38.25.63.10     x.acme.com              # x client host

# localhost name resolution is handled within DNS itself.

# ::1             localhost

#127.0.0.1        localhost

#123.129.242.169   hub5idx.shub.sandai.net

#58.254.134.233   hub5pr.sandai.net