[ale] PPPo{EA} v NAT in DSL gateways

[Jason Fritcher]

I just bought a Cisco 857W yesterday to consolidate my AT&T 2210 DSL  
modem and my Linksys WRT54G router. I'll write an update with my  
experiences after I receive the Cisco and get it setup. But  
considering the 857 runs IOS, there is a lot of flexibility in how you  
can set it up.


On Dec 29, 2008, at 11:46 AM, Ken Cochran wrote:

> Actually, yes (helpful).  :)
> Doing it "somehow" beats not doing it no-how...
> Need to research other DSL gateways besides the Westell,
> e.g. Netopia, maybe some Cicso thing (1800? 800?)  Or, rolling
> my own with something that'll be *good* with the likes of OpenWRT.
>
> -kc
>
>> Date: Mon, 29 Dec 2008 11:13:40 -0500
>> From: "James Taylor" <James.Taylor at eastcobbgroup.com>
>> To: <ale at ale.org>
>> Subject: Re: [ale] PPPo{EA} v NAT in DSL gateways
>>
>> I had to do that with an ATT box a few months ago. I don't remember  
>> what
>> kind of DSL router it was, but ATT doesn't document the configuration
>> for it anywhere, and can't help you set it up.
>>
>> I was able to get it to work using an obscure setting change in the
>> configuration, but I don't recall what it was.  All I remember is  
>> that
>> the label of the setting didn't look like it had anything to do with
>> what I wanted to do.
>>
>> Real helpful, eh?
>> -jt
>>
>> James Taylor
>> The East Cobb Group, Inc.
>> 678-697-9420
>> james.taylor at eastcobbgroup.com
>> http://www.eastcobbgroup.com
>>
>>>>> Ken Cochran <kwc at theworld.com> 12/29/2008 10:36 AM >>>
>> Summary:  Looking for ability to set up PPPo{EA} support
>>         *without* NAT in some kind of DSL box.
>>
>> I'm trying to research DSL connectivity options at my locality.
>> (Charter) cablemodem has become too expensive; DSL is the only
>> other option & for residential, that's AT&T-only here.
>>
>> I asked here a week or two ago but not much of an answer I guess:
>>
>> Last I remember, by default, AT&T supplies a Westell DSL gateway
>> for residences.  What I've seen of it is that it generally
>> acts as a router, and handling the PPPo{EA} signon itself but
>> also NAT, supplying on the LAN side private IP addresses in
>> 192.168/24.  I read that I can put that gateway into "bridge"
>> mode & it no longer does NAT (that would then be up to my own
>> devices of course) but it isn't clear to me whether that also
>> breaks the builtin PPPo{EA} support.
>>
>> Questions:
>>
>> - If I change that Westell to bridge mode does that also mean
>> I have to do my own PPPo{EA}?
>>
>> - Any (good, better) alternatives to that Westell?  For example,
>> I've seen some from Netopia but I don't know much about these
>> types of products.
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-- 
Jason Fritcher
jkf at wolfnet.org