firewalls vs. wireless

firewalls vs. wireless
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Subject Author Date
firewalls vs. wireless unstablemicroso 07-10-2006
Posted by =?Utf-8?B?dW5zdGFibGVtaWNyb3Nv on July 10, 2006, 7:52 pm
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Hi. I have a McAfee firewall 6.0, but even if you don't have this particular
firewall you might be able to answer my question. You can also consider this
a question about firewalls in general.

My configuration: wall socket from cable company, from there a cable to my
cable modem, from there a cable to my router, from router to adapter on
computer in different room a wireless connection, WPA-PSK security. No other
devices in network.

What is the place of the firewall in the configuration ? WHAT I'D REALLY
LIKE TO KNOW IS IF ANY (INCOMING) DATA THAT GOES THROUGH THE ADAPTER ON THE
COMPUTER, WILL AFTER THAT WILL HAVE TO GO THROUGH THE FIREWALL.

Or is it possible to connect wirelessly to my computer without having to go
through the firewall ? (wl-143 sitecom router and wl-142 adapter)

Please ignore the issue about WPA-PSK security.

Thank you.

Posted by Steven L Umbach on July 10, 2006, 8:02 pm
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An internet router such as you describe the configuration for will only
filter traffic to/from the internet, be the default gateway for your
network, and will not be used for traffic between computers on your network
whether they are wireless or wired. Typically a wireless access point will
have an IP address on your local network. When a computer on your network
generates traffic that goes to another computer on your network it will go
directly to that computer. Only when a computer tries to access an IP
address not on your network will it then go to the default gateway and thus
can be filtered by the internet router. You need to use a host firewall
such as the Windows Firewall to protect computers on your network from each
other if you have that need. --- Steve




> Hi. I have a McAfee firewall 6.0, but even if you don't have this
> particular
> firewall you might be able to answer my question. You can also consider
> this
> a question about firewalls in general.
>
> My configuration: wall socket from cable company, from there a cable to my
> cable modem, from there a cable to my router, from router to adapter on
> computer in different room a wireless connection, WPA-PSK security. No
> other
> devices in network.
>
> What is the place of the firewall in the configuration ? WHAT I'D REALLY
> LIKE TO KNOW IS IF ANY (INCOMING) DATA THAT GOES THROUGH THE ADAPTER ON
> THE
> COMPUTER, WILL AFTER THAT WILL HAVE TO GO THROUGH THE FIREWALL.
>
> Or is it possible to connect wirelessly to my computer without having to
> go
> through the firewall ? (wl-143 sitecom router and wl-142 adapter)
>
> Please ignore the issue about WPA-PSK security.
>
> Thank you.



Posted by =?Utf-8?B?dW5zdGFibGVtaWNyb3Nv on July 11, 2006, 7:57 pm
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Sorry, maybe I don't quite get it because it's late ...

I'm sure the firewall works well with my router.

But if for example my neighbour (let's ignore WPA-PSK) would establish a
wireless connection to the adapter on my computer (only one computer in my
network)would there be a (fire) WALL between the adapter device and the
computer ? To intercept the datastream between the adapter on the computer
and the computer itself ? Btw, I have a McAfee firewall, 6.0.

Thank you.
"Steven L Umbach" schreef:

> An internet router such as you describe the configuration for will only
> filter traffic to/from the internet, be the default gateway for your
> network, and will not be used for traffic between computers on your network
> whether they are wireless or wired. Typically a wireless access point will
> have an IP address on your local network. When a computer on your network
> generates traffic that goes to another computer on your network it will go
> directly to that computer. Only when a computer tries to access an IP
> address not on your network will it then go to the default gateway and thus
> can be filtered by the internet router. You need to use a host firewall
> such as the Windows Firewall to protect computers on your network from each
> other if you have that need. --- Steve
>
>
>
>
> > Hi. I have a McAfee firewall 6.0, but even if you don't have this
> > particular
> > firewall you might be able to answer my question. You can also consider
> > this
> > a question about firewalls in general.
> >
> > My configuration: wall socket from cable company, from there a cable to my
> > cable modem, from there a cable to my router, from router to adapter on
> > computer in different room a wireless connection, WPA-PSK security. No
> > other
> > devices in network.
> >
> > What is the place of the firewall in the configuration ? WHAT I'D REALLY
> > LIKE TO KNOW IS IF ANY (INCOMING) DATA THAT GOES THROUGH THE ADAPTER ON
> > THE
> > COMPUTER, WILL AFTER THAT WILL HAVE TO GO THROUGH THE FIREWALL.
> >
> > Or is it possible to connect wirelessly to my computer without having to
> > go
> > through the firewall ? (wl-143 sitecom router and wl-142 adapter)
> >
> > Please ignore the issue about WPA-PSK security.
> >
> > Thank you.
>
>
>

Posted by Patrick Dickey on July 11, 2006, 10:09 pm
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> Sorry, maybe I don't quite get it because it's late ...
>
> I'm sure the firewall works well with my router.
>
> But if for example my neighbour (let's ignore WPA-PSK) would establish a
> wireless connection to the adapter on my computer (only one computer in my
> network)would there be a (fire) WALL between the adapter device and the
> computer ? To intercept the datastream between the adapter on the computer
> and the computer itself ? Btw, I have a McAfee firewall, 6.0.
>
> Thank you.
> "Steven L Umbach" schreef:
>
>> An internet router such as you describe the configuration for will only
>> filter traffic to/from the internet, be the default gateway for your
>> network, and will not be used for traffic between computers on your
>> network
>> whether they are wireless or wired. Typically a wireless access point
>> will
>> have an IP address on your local network. When a computer on your network
>> generates traffic that goes to another computer on your network it will
>> go
>> directly to that computer. Only when a computer tries to access an IP
>> address not on your network will it then go to the default gateway and
>> thus
>> can be filtered by the internet router. You need to use a host firewall
>> such as the Windows Firewall to protect computers on your network from
>> each
>> other if you have that need. --- Steve

Consider the McAfee firewall on your computer as a last resort between the
data on your computer and the data flowing in and out of your network.
Essentially, that's what it is. If your neighbor ties into your wireless
network (with or without your permission) then the last resort would depend
on whether he/she has a firewall installed also.

The internet router acts like a firewall in some sense. Just in the sense
that if you don't have ports configured to be forwarded, no incoming data
will get through it (or shouldn't) unless you initiate the connection. If,
however, you have a port forwarded to your computer (essentially telling the
router that any data coming in on this port goes to this IP address), then
any incoming data will reach your computer. It's up to your software
firewall (McAfee in this case) to determine if the data is ok or malicious.
If you don't have a firewall, then any data coming in on the forwarded ports
will have free reign of your computer.

Please understand that when I refer to "Data" in my above statements, I'm
including attempts to log into your computer, viruses, spyware, pictures,
text, and whatever else comes in on a packet.



--
Patrick Dickey.

smile... someone out there cares deeply for you.
http://www.microsoft.com/protect
http://update.microsoft.com
http://www.pats-computer-solutions.com


Posted by Steven L Umbach on July 11, 2006, 10:40 pm
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It sounds like your internet router is also a wireless access point. In that
case if someone was able to access your wireless network via the wireless
router they would be on your network and not subject to any traffic
filtering in your internet router for your local network but they could be
subject to traffic filtering via your McAfee software firewall. Most likely
they would not be able to do an ad hock connection to your wireless network
adapter [the wireless router/access point signal would be MUCH stronger] and
you should disable that ability anyhow. --- Steve


> Sorry, maybe I don't quite get it because it's late ...
>
> I'm sure the firewall works well with my router.
>
> But if for example my neighbour (let's ignore WPA-PSK) would establish a
> wireless connection to the adapter on my computer (only one computer in my
> network)would there be a (fire) WALL between the adapter device and the
> computer ? To intercept the datastream between the adapter on the computer
> and the computer itself ? Btw, I have a McAfee firewall, 6.0.
>
> Thank you.
> "Steven L Umbach" schreef:
>
>> An internet router such as you describe the configuration for will only
>> filter traffic to/from the internet, be the default gateway for your
>> network, and will not be used for traffic between computers on your
>> network
>> whether they are wireless or wired. Typically a wireless access point
>> will
>> have an IP address on your local network. When a computer on your network
>> generates traffic that goes to another computer on your network it will
>> go
>> directly to that computer. Only when a computer tries to access an IP
>> address not on your network will it then go to the default gateway and
>> thus
>> can be filtered by the internet router. You need to use a host firewall
>> such as the Windows Firewall to protect computers on your network from
>> each
>> other if you have that need. --- Steve
>>
>>
>>
>>
>> in
>> > Hi. I have a McAfee firewall 6.0, but even if you don't have this
>> > particular
>> > firewall you might be able to answer my question. You can also consider
>> > this
>> > a question about firewalls in general.
>> >
>> > My configuration: wall socket from cable company, from there a cable to
>> > my
>> > cable modem, from there a cable to my router, from router to adapter on
>> > computer in different room a wireless connection, WPA-PSK security. No
>> > other
>> > devices in network.
>> >
>> > What is the place of the firewall in the configuration ? WHAT I'D
>> > REALLY
>> > LIKE TO KNOW IS IF ANY (INCOMING) DATA THAT GOES THROUGH THE ADAPTER ON
>> > THE
>> > COMPUTER, WILL AFTER THAT WILL HAVE TO GO THROUGH THE FIREWALL.
>> >
>> > Or is it possible to connect wirelessly to my computer without having
>> > to
>> > go
>> > through the firewall ? (wl-143 sitecom router and wl-142 adapter)
>> >
>> > Please ignore the issue about WPA-PSK security.
>> >
>> > Thank you.
>>
>>
>>



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