Ping not respond, SSh not login,

Dear all,

after installing 13.1, I really sorry, lot of things not working. Too complex now.

Can not login from local subnet using ssh, even after modify /etc/ssh/sshd_config

Pings from pcs in local subnet not responding too.

And more, but I need this two basic things to continue.

From 13.1 to other computers not problems at all. I can login into others linux using ssh.

Thanks in advance.