Fix Raspbian SSH Error "Connection reset by peer"

If you set up a fresh Raspberry Pi with Raspbian and you can't connect with ssh due to:

ssh pi@192.168.1.3
Read from socket failed: Connection reset by peer

Solution: Log in on your Pi. Delete and regenerate ssh server keys:

sudo rm /etc/ssh/ssh_host_* 
sudo dpkg-reconfigure openssh-server 

Source: Raspberry Pi Forums