ssh长时间不用连接中断。

连接中断问题修改 /etc/ssh/sshd_config

ClientAliveInterval 60
ClientAliveCountMax 3

service sshd restart

另外有时候会遇到连接缓慢的问题查找资料可能需要修改

GSSAPIAuthentication

UseDNS

另外关于  tcpkeepAlive 直接摘录如下。

• TCPKeepAlive operates on the TCP layer. It sends an empty TCP ACK packet. Firewalls can be configured to ignore these packets, so if you go through a firewall that drops idle connections, these may not keep the connection alive.
• ServerAliveInterval operates on the ssh layer. It will actually send data through ssh, so the TCP packet has encrypted data in and a firewall cant tell if its a keepalive, or a legitimate packet, so these work better.