[Intrusions] brute force attack - tcp wrappers and iptables not helping?

[Tom Glaab]

Susanne Hemker wrote:

>  Failed password for invalid user $name from ::ffff:$IP port $port
>  ssh2
>
>  Since the tcp wrappers and the iptables should not allow ssh login
>  from any host outside our lab,

Are your iptables rules set to deny in the IPv6 address space as well as 
IPv4?

tg.