在链接的属性(SSH -> 安全性) 的加密算法列表中选择 aes256-ctr， mac加密列表中选择hmac-sha2-256，保存即可
To enable hmac-sha2-256 and aes256-ctr go to the SSH > Security page in the session properties. Click the Edit button for Encryption and MAC. Make sure everything is selected for encryption and MAC.
XShell 无法匹配的outgoing encryption算法 ,No matching outgoing encryption algorithm found
原文：http://www.cnblogs.com/i2u9/p/ssh-no-alg-matching.html