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Can Linksys broadband/wifi routers run inbound/outbound access lists?



 
 
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  #1  
Old December 5th 03, 05:46 PM posted to comp.dcom.sys.cisco,uk.telecom.broadband
Phillip Remaker
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Posts: 1
Default Can Linksys broadband/wifi routers run inbound/outbound access lists?

My GF is getting one of these soon. I've had lots of problems with
getting probed from what looks like infected external machines, but
I've got a Cisco 803 on which you can set this up...


Well, all of the Linksys models stop all unsolicited inbound traffic on the
"WAN" port unless explicitly permitted (since it is really a Network Address
Translation (NAT) box, not a 'router'), so that should stop the probing at
the door. Using access-lists is moot, since the default is to deny
everyone. Compare this to IOS routing, where packets are allowed in unless
explicitly denied. Note that IOS NAT also denies all inbound packets unless
it matches an outbound stream or is explicitly permitted.

You can restrict wireless access by MAC address and WEP keys.


  #2  
Old December 6th 03, 05:59 PM posted to comp.dcom.sys.cisco,uk.telecom.broadband
Walter Roberson
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Posts: 15
Default Can Linksys broadband/wifi routers run inbound/outbound access lists?

In article [email protected],
Phillip Remaker wrote:
:Well, all of the Linksys models stop all unsolicited inbound traffic on the
:"WAN" port unless explicitly permitted (since it is really a Network Address
:Translation (NAT) box, not a 'router'), so that should stop the probing at
:the door.

And how do they do that for UDP? How can they tell whether the traffic
is "unsolicited" ?

Linksys has an extensive model line, and not all of the models use
any kind of stateful inspection.
--
Suppose there was a test you could take that would report whether
you had Free Will or were Pre-Destined. Would you take the test?
  #3  
Old December 6th 03, 06:11 PM posted to comp.dcom.sys.cisco,uk.telecom.broadband
Rik Bain
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Posts: 2
Default Can Linksys broadband/wifi routers run inbound/outbound access lists?

On Sat, 06 Dec 2003 11:59:21 -0600, Walter Roberson wrote:

In article [email protected], Phillip Remaker
wrote: :Well, all of the Linksys models stop all
unsolicited inbound traffic on the :"WAN" port unless explicitly
permitted (since it is really a Network Address :Translation (NAT) box,
not a 'router'), so that should stop the probing at :the door.

And how do they do that for UDP? How can they tell whether the traffic
is "unsolicited" ?

Linksys has an extensive model line, and not all of the models use any
kind of stateful inspection.


It builds a translation for the outbound UDP stream, and subsequent
packets are permitted in.

If I were to send a UDP datagram to one of these devices, and it does not
have a translation for that particular port to an internal host, the
packet will be dropped.
 




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