Re: How do I share files (securely) using wifi modem/router?

On Fri, 21 Jul 2006 12:38:59 +0200, in alt.internet.wireless ,
hlexa@hotmail.com (Axel Hammerschmidt) wrote:

>Terry <handmade@operamail.com> wrote:
>
>> hlexa@hotmail.com (Axel Hammerschmidt) wrote in
>> news:1hisn7b.zy2oit14k1juqN%hlexa@hotmail.com:
>
><snip>
>
>> > A link explaining NAT- and SPI firewalls:
>> >
>> > http://www.practicallynetworked.com/...g/firewall.htm
>>
>> The router I'm using (Netgear DG834G) uses SPI according to the
>> spec.
>>
>> As there's no reason anyone would want to target my PC, am I safe
>> from a random or casual attack, as regards having 'file and printer
>> sharing' enabled?
>>
>> And, just out of interest, is it really possible for someone to get
>> past NAT and access to files?
>
>No.

Well, yes actually though not trivially.

- you could mistakenly open the ports on your router.
- your router could have an exploitable flaw in the firmware.

> And why should someone with a NAT firewall who wants to turn on file
>and printer sharing be concerned about (from the link above, using SPI):

(list of fairly irrelevant items).

Well, they're all things one should perhaps be interested in blocking
anyway, but I agree tehy've sod all to do with file & printer sharing.
--
Mark McIntyre

Mark McIntyre <markmcintyre@spamcop.net> wrote:

> On Fri, 21 Jul 2006 12:38:59 +0200, in alt.internet.wireless ,
> hlexa@hotmail.com (Axel Hammerschmidt) wrote:
>
> >Terry <handmade@operamail.com> wrote:
> >
> >> hlexa@hotmail.com (Axel Hammerschmidt) wrote in
> >> news:1hisn7b.zy2oit14k1juqN%hlexa@hotmail.com:
> >
> ><snip>
> >
> >> > A link explaining NAT- and SPI firewalls:
> >> >
> >> > http://www.practicallynetworked.com/...g/firewall.htm
> >>
> >> The router I'm using (Netgear DG834G) uses SPI according to the
> >> spec.
> >>
> >> As there's no reason anyone would want to target my PC, am I safe
> >> from a random or casual attack, as regards having 'file and printer
> >> sharing' enabled?
> >>
> >> And, just out of interest, is it really possible for someone to get
> >> past NAT and access to files?
> >
> >No.
>
> Well, yes actually though not trivially.
>
> - you could mistakenly open the ports on your router.

He asked, is it possible for someone to...

> - your router could have an exploitable flaw in the firmware.

So could a router with SPI.

> > And why should someone with a NAT firewall who wants to turn on file
> >and printer sharing be concerned about (from the link above, using SPI):
>
> (list of fairly irrelevant items).

Exactly!

> Well, they're all things one should perhaps be interested in blocking
> anyway, but I agree tehy've sod all to do with file & printer sharing.

All these Chicken Littles (Mr Navas) on usenet.