why is netstat using ::ffff

Jason Davis wrote:
> netstat -tap
>
> i get this ...
> Proto Recv-Q Send-Q Local Address           Foreign Address       
> State       PID/Program name
> tcp        0      0 *:ssh                   *:*                   
> LISTEN      1263/sshd
>
> tcp        0      0 ::ffff:192.168.1.18:ssh ::ffff:192.168.1.:52509
> ESTABLISHED 18814/0
>
>
> (sorry if above wraps)
>
> So

The ::ffff:1.2.3.4 format is called an IPv4-mapped address.  If your OS
and application are IPv6-enabled, you might see this.  If you are
interested in the v4 address, just ignore the ::ffff: component.