SSH error ( Read from socket failed: Connection reset by peer ) and it's solution
ssh cann't connected ,event in localhost
[root@localhost ssh]# ssh 127.0.0.1
Read from socket failed: Connection reset by peer
try the following refer to internet ,but failed (the reference OS is UBUNTU, while mine is fedora )
[root@localhost ~]#ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
[root@localhost ~]#ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
[root@localhost ~]#/etc/init.d/ssh restart
[root@localhost ~]# /etc/init.d/sshd restart
停止 sshd： [确定]
正在启动 sshd：@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: UNPROTECTED PRIVATE KEY FILE! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0777 for '/etc/ssh/ssh_host_rsa_key' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /etc/ssh/ssh_host_rsa_key
Could not load host key: /etc/ssh/ssh_host_rsa_key
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: UNPROTECTED PRIVATE KEY FILE! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0777 for '/etc/ssh/ssh_host_dsa_key' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /etc/ssh/ssh_host_dsa_key
Could not load host key: /etc/ssh/ssh_host_dsa_key
check the log
[root@localhost ssh]# vi /var/log/messages
......
Jul 4 16:09:57 localhost sshd[21078]: error: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Jul 4 16:09:57 localhost sshd[21078]: error: @ WARNING: UNPROTECTED PRIVATE KEY FILE! @
Jul 4 16:09:57 localhost sshd[21078]: error: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Jul 4 16:09:57 localhost sshd[21078]: error: Permissions 0777 for '/etc/ssh/ssh_host_rsa_key' are too open.
Jul 4 16:09:57 localhost sshd[21078]: error: It is recommended that your private key files are NOT accessible by others.
Jul 4 16:09:57 localhost sshd[21078]: error: This private key will be ignored.
Jul 4 16:09:57 localhost sshd[21078]: error: bad permissions: ignore key: /etc/ssh/ssh_host_rsa_key
Jul 4 16:09:57 localhost sshd[21078]: error: Could not load host key: /etc/ssh/ssh_host_rsa_key
Jul 4 16:09:57 localhost sshd[21078]: error: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Jul 4 16:09:57 localhost sshd[21078]: error: @ WARNING: UNPROTECTED PRIVATE KEY FILE! @
Jul 4 16:09:57 localhost sshd[21078]: error: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Jul 4 16:09:57 localhost sshd[21078]: error: Permissions 0777 for '/etc/ssh/ssh_host_dsa_key' are too open.
Jul 4 16:09:57 localhost sshd[21078]: error: It is recommended that your private key files are NOT accessible by others.
Jul 4 16:09:57 localhost sshd[21078]: error: This private key will be ignored.
Jul 4 16:09:57 localhost sshd[21078]: error: bad permissions: ignore key: /etc/ssh/ssh_host_dsa_key
Jul 4 16:09:57 localhost sshd[21078]: error: Could not load host key: /etc/ssh/ssh_host_dsa_key
noticing the permissions info , I check the following files in /etc/ssh/
[root@localhost ssh]# ls -l
总用量 156
-rwxrwxrwx. 1 root root 125811 10月 6 2010 moduli
-rwxrwxrwx. 1 root root 2104 10月 6 2010 ssh_config
-rwxrwxrwx. 1 root root 3767 10月 6 2010 sshd_config
-rwxrwxrwx. 1 root root 668 7月 4 15:53 ssh_host_dsa_key
-rwxrwxrwx. 1 root root 616 7月 4 15:53 ssh_host_dsa_key.pub
-rwxrwxrwx. 1 root root 965 6月 14 2011 ssh_host_key
-rwxrwxrwx. 1 root root 630 6月 14 2011 ssh_host_key.pub
-rwxrwxrwx. 1 root root 1679 7月 4 15:54 ssh_host_rsa_key
-rwxrwxrwx. 1 root root 408 7月 4 15:54 ssh_host_rsa_key.pub
[root@localhost ssh]# chmod 600 ssh_host_rsa_key
[root@localhost ssh]# chmod 600 ssh_host_dsa_key
[root@localhost ssh]# ls -l
总用量 156
-rwxrwxrwx. 1 root root 125811 10月 6 2010 moduli
-rwxrwxrwx. 1 root root 2104 10月 6 2010 ssh_config
-rwxrwxrwx. 1 root root 3767 10月 6 2010 sshd_config
-rw-------. 1 root root 668 7月 4 15:53 ssh_host_dsa_key
-rwxrwxrwx. 1 root root 616 7月 4 15:53 ssh_host_dsa_key.pub
-rwxrwxrwx. 1 root root 965 6月 14 2011 ssh_host_key
-rwxrwxrwx. 1 root root 630 6月 14 2011 ssh_host_key.pub
-rw-------. 1 root root 1679 7月 4 15:54 ssh_host_rsa_key
-rwxrwxrwx. 1 root root 408 7月 4 15:54 ssh_host_rsa_key.pub
retry, it works.
[root@localhost ssh]# ssh 127.0.0.1
The authenticity of host '127.0.0.1 (127.0.0.1)' can't be established.
RSA key fingerprint is cf:b5:24:67:9c:a9:e9:ab:89:2c:3d:54:5c:13:ed:17.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '127.0.0.1' (RSA) to the list of known hosts.
root@127.0.0.1's password:
Last login: Thu Mar 8 09:31:31 2012 from 192.168.4.139
[root@localhost ssh]# ssh 127.0.0.1
Read from socket failed: Connection reset by peer
try the following refer to internet ,but failed (the reference OS is UBUNTU, while mine is fedora )
[root@localhost ~]#ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
[root@localhost ~]#ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
[root@localhost ~]#/etc/init.d/ssh restart
[root@localhost ~]# /etc/init.d/sshd restart
停止 sshd： [确定]
正在启动 sshd：@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: UNPROTECTED PRIVATE KEY FILE! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0777 for '/etc/ssh/ssh_host_rsa_key' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /etc/ssh/ssh_host_rsa_key
Could not load host key: /etc/ssh/ssh_host_rsa_key
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: UNPROTECTED PRIVATE KEY FILE! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Permissions 0777 for '/etc/ssh/ssh_host_dsa_key' are too open.
It is recommended that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /etc/ssh/ssh_host_dsa_key
Could not load host key: /etc/ssh/ssh_host_dsa_key
check the log
[root@localhost ssh]# vi /var/log/messages
......
Jul 4 16:09:57 localhost sshd[21078]: error: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Jul 4 16:09:57 localhost sshd[21078]: error: @ WARNING: UNPROTECTED PRIVATE KEY FILE! @
Jul 4 16:09:57 localhost sshd[21078]: error: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Jul 4 16:09:57 localhost sshd[21078]: error: Permissions 0777 for '/etc/ssh/ssh_host_rsa_key' are too open.
Jul 4 16:09:57 localhost sshd[21078]: error: It is recommended that your private key files are NOT accessible by others.
Jul 4 16:09:57 localhost sshd[21078]: error: This private key will be ignored.
Jul 4 16:09:57 localhost sshd[21078]: error: bad permissions: ignore key: /etc/ssh/ssh_host_rsa_key
Jul 4 16:09:57 localhost sshd[21078]: error: Could not load host key: /etc/ssh/ssh_host_rsa_key
Jul 4 16:09:57 localhost sshd[21078]: error: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Jul 4 16:09:57 localhost sshd[21078]: error: @ WARNING: UNPROTECTED PRIVATE KEY FILE! @
Jul 4 16:09:57 localhost sshd[21078]: error: @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
Jul 4 16:09:57 localhost sshd[21078]: error: Permissions 0777 for '/etc/ssh/ssh_host_dsa_key' are too open.
Jul 4 16:09:57 localhost sshd[21078]: error: It is recommended that your private key files are NOT accessible by others.
Jul 4 16:09:57 localhost sshd[21078]: error: This private key will be ignored.
Jul 4 16:09:57 localhost sshd[21078]: error: bad permissions: ignore key: /etc/ssh/ssh_host_dsa_key
Jul 4 16:09:57 localhost sshd[21078]: error: Could not load host key: /etc/ssh/ssh_host_dsa_key
noticing the permissions info , I check the following files in /etc/ssh/
[root@localhost ssh]# ls -l
总用量 156
-rwxrwxrwx. 1 root root 125811 10月 6 2010 moduli
-rwxrwxrwx. 1 root root 2104 10月 6 2010 ssh_config
-rwxrwxrwx. 1 root root 3767 10月 6 2010 sshd_config
-rwxrwxrwx. 1 root root 668 7月 4 15:53 ssh_host_dsa_key
-rwxrwxrwx. 1 root root 616 7月 4 15:53 ssh_host_dsa_key.pub
-rwxrwxrwx. 1 root root 965 6月 14 2011 ssh_host_key
-rwxrwxrwx. 1 root root 630 6月 14 2011 ssh_host_key.pub
-rwxrwxrwx. 1 root root 1679 7月 4 15:54 ssh_host_rsa_key
-rwxrwxrwx. 1 root root 408 7月 4 15:54 ssh_host_rsa_key.pub
[root@localhost ssh]# chmod 600 ssh_host_rsa_key
[root@localhost ssh]# chmod 600 ssh_host_dsa_key
[root@localhost ssh]# ls -l
总用量 156
-rwxrwxrwx. 1 root root 125811 10月 6 2010 moduli
-rwxrwxrwx. 1 root root 2104 10月 6 2010 ssh_config
-rwxrwxrwx. 1 root root 3767 10月 6 2010 sshd_config
-rw-------. 1 root root 668 7月 4 15:53 ssh_host_dsa_key
-rwxrwxrwx. 1 root root 616 7月 4 15:53 ssh_host_dsa_key.pub
-rwxrwxrwx. 1 root root 965 6月 14 2011 ssh_host_key
-rwxrwxrwx. 1 root root 630 6月 14 2011 ssh_host_key.pub
-rw-------. 1 root root 1679 7月 4 15:54 ssh_host_rsa_key
-rwxrwxrwx. 1 root root 408 7月 4 15:54 ssh_host_rsa_key.pub
retry, it works.
[root@localhost ssh]# ssh 127.0.0.1
The authenticity of host '127.0.0.1 (127.0.0.1)' can't be established.
RSA key fingerprint is cf:b5:24:67:9c:a9:e9:ab:89:2c:3d:54:5c:13:ed:17.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '127.0.0.1' (RSA) to the list of known hosts.
root@127.0.0.1's password:
Last login: Thu Mar 8 09:31:31 2012 from 192.168.4.139
