ADSL modem/router firewall

Previously on my dial-up connection I configured iptables (via guarddog)
to 'stealth' all ports. Now I have an ADSL connection, and regardless of
what changes I make to iptables, all ports are now visible (but closed).

I get the same problem in Win XP running ZoneAlarm, so I'm guessing the
problem is with the modem/router, not the PC.

Is it possible to configure the modem/router to stealth the ports? (I'm
using a Netcomm 1300+4 modem)

TIA

skip <skip@skip.net> wrote:
> Is it possible to configure the modem/router to stealth the ports? (I'm
> using a Netcomm 1300+4 modem)

how useful do you think it would be ? the open and closed ports still can
be detected. a bit slower maybe and your intrusion detection system may
not see it at all. you also break the tcp specs.

On Sat, 24 Jul 2004 11:40:12 +1000, the right honourable skip
<skip@skip.net> wrote:

>Previously on my dial-up connection I configured iptables (via guarddog)
>to 'stealth' all ports. Now I have an ADSL connection, and regardless of
>what changes I make to iptables, all ports are now visible (but closed).
>
>I get the same problem in Win XP running ZoneAlarm, so I'm guessing the
>problem is with the modem/router, not the PC.
>
>Is it possible to configure the modem/router to stealth the ports? (I'm
>using a Netcomm 1300+4 modem)
>
>TIA

Is it not so, that the outside now sees the ports of the --modem--,
and not, like before, the ports of your --iptables computer-- ?

frgr
Erik