ssh 阻塞问题net work unreachable

最近设备调试中遇到，从跳板服务器ssh 到现场机树莓派报 network unreachable,
在现场树莓派设备中使用调试命令 ssh -vvv Myserver or ssh -v Myserver查看 ，阻塞于

expecting SSH2_MSG_KEX_ECDH_REPLY

参考内容

The solution was found here: SSH works in putty but not terminal

in Ubuntu 13.10/12.10, login and gain sudo access.

Edit /etc/ssh/ssh_config, uncomment the following lines

Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc
GSSAPIAuthentication yes
GSSAPIDelegateCredentials no
MACs hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160

Add the following line

HostKeyAlgorithms ssh-rsa,ssh-dss

You should end up with your /etc/ssh/ssh_config file looking like this

Host *
Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc
MACs hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160
SendEnv LANG LC_*
HashKnownHosts yes
GSSAPIAuthentication yes
GSSAPIDelegateCredentials no
HostKeyAlgorithms ssh-rsa,ssh-dss

Now run ssh -T -v git@github.com and it will ask you to add the server to your known hosts file. Hit yes, and then it should welcome you to the server.