sshbomb

sshbomb pretends to be sshd and sends random garbage to anyone who dares connect. It's a dumb way to mess with script kiddies.

Usage

If you don't want to run sshbomb as root, set up an iptables redirect to forward connections from port 22 to port 2222:

# iptables -A INPUT -i eth0 -p tcp --dport 22 -j ACCEPT
# iptables -A INPUT -i eth0 -p tcp --dport 2222 -j ACCEPT
# iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 22 -j REDIRECT --to-port 2222

Now launch the program with your favorite service manager (nohup, runit, whatever). With the default options sshbomb will pretend to be SSH-2.0-OpenSSH_5.3 when accepting connections. It will spew 1MB of junk.

# nohup sshbomb -address="example.com:2222" 1>sshbomb.log 2>&1 &
# telnet example.com 2222
Trying 127.0.0.1...
    Connected to example.com.
    Escape character is '^]'.
    SSH-2.0-OpenSSH_5.37
?????[random gibberish forever]???????????????????????
??????????????????????????????????????????????????????

Options

-advertise=true: advertise sshd version by displaying banner

-banner="SSH-2.0-OpenSSH_5.3": sshd banner to present if advertise flag is set

-listen=":2222": address to listen on

-size=1048576: size in bytes of data to send