access ssh from mac to linux, will it be frozen if timeout
 

I connect the mac terminal to linux ssh. After I stay online for a while and the terminal will be frozen. Is that my mac problem or my server problem?

If you're passing through a NAT device (i.e. your home router?) along the way, then that's likely the cause.

For an OpenSSH client, I solve that problem with the following directive in ~/.ssh/config:
Check your Mac ssh client for some sort of "keep alive" functionality and enable it.

Thanks a lots
 

I will try this out. Luckily not my mac broken or have virus...