Bugtraq: Re: SMTP server account probing

[alan () LXORGUK UKUU ORG UK (Alan Cox)]

> Maybe what's needed is a new ioctl on a socket, so you can do this:
>
>     if (vrfy_cnt > 25) {
>         ioctl(net_socket,SO_NOSENDFIN);
>         clkose(net_socket);
>     }
How about adding a firewall rule for the site concerned ? Thats programatically
similar and has the advantage they wont be back until you get bored enough
to remove the block