This will also kill your current connection, but it’s really simple:

ps axw | egrep 'lhl' | grep sshd | awk {'print $1'} | xargs kill

• Unix Review: Using the xargs Command
• Pkill.sh [Shell script to kill process by name]
• pkill w/ a for loop
• FreeBSD port of pkill
• pgrep and pkill for BSD