Shorewall users - Feb 2003 - Adsl Newbie

I post this here not because its Shorewall related but just
cuz there are lots of knowledgable folks here...

I had to convert a firewall from cable (dhcp on eth0) to 
adsl (external Alcatel modem) connected to eth0 via cat5).

Since this is my first exposure to Adsl I waded thru all the
howtos I could find.

The part that escapes me is this bit about what to do
with eth0?  

Some setups suggest you give it no ip
when setting it up,. but SuSE suggests you give it
some arbitrary rfc1918 ip.?  

Just how does adsl actually get from ppp0 to eth0?

It seems like you end up with this dangeling physical interface
which you KNOW is actually carrying the traffic but it gets 
called by this other name (ppp0), and is sort of like a modem
but not really and it does not always exist.  Is this some
sort of alias interface name or what?

Is anyone aware of a good explanation on the net somewhere
about how this all really works?

The shorewall bit....

Tom''s docs seem to suggest that the net zone points
to ppp0, and I can make that change, but is all reference
to eth0 then dropped from the shorewall files and replaced
everywhere with ppp0?

______________________________________
John Andersen
NORCOM / Juneau, Alaska
http://www.screenio.com/
(907) 790-3386

John S. Andersen wrote:
> The shorewall bit....
> 
> Tom''s docs seem to suggest that the net zone points
> to ppp0, and I can make that change, but is all reference
> to eth0 then dropped from the shorewall files and replaced
> everywhere with ppp0?
Yes.

-Tom
-- 
Tom Eastep    \ Shorewall - iptables made easy
Shoreline,     \ http://www.shorewall.net
Washington USA  \ teastep@shorewall.net

On (12/02/03 11:38), John S. Andersen wrote:
> From: "John S. Andersen" <JAndersen@screenio.com>
> To: Shorewall-users@lists.shorewall.net
> Date: Wed, 12 Feb 2003 11:38:17 -0900
> Subject: [Shorewall-users] Adsl Newbie
> Reply-To: JAndersen@screenio.com
> 
> I post this here not because its Shorewall related but just
> cuz there are lots of knowledgable folks here...
> 
> I had to convert a firewall from cable (dhcp on eth0) to 
> adsl (external Alcatel modem) connected to eth0 via cat5).
> 
> Since this is my first exposure to Adsl I waded thru all the
> howtos I could find.
> 
> The part that escapes me is this bit about what to do
> with eth0?  
> 
> Some setups suggest you give it no ip
> when setting it up,. but SuSE suggests you give it
> some arbitrary rfc1918 ip.?  
> 
> Just how does adsl actually get from ppp0 to eth0?
> 
> It seems like you end up with this dangeling physical interface
> which you KNOW is actually carrying the traffic but it gets 
> called by this other name (ppp0), and is sort of like a modem
> but not really and it does not always exist.  Is this some
> sort of alias interface name or what?
> 
> Is anyone aware of a good explanation on the net somewhere
> about how this all really works?
> 
> The shorewall bit....
> 
> Tom''s docs seem to suggest that the net zone points
> to ppp0, and I can make that change, but is all reference
> to eth0 then dropped from the shorewall files and replaced
> everywhere with ppp0?
> 
> ______________________________________
> John Andersen
> NORCOM / Juneau, Alaska
> http://www.screenio.com/
> (907) 790-3386
> _______________________________________________
> Shorewall-users mailing list
> Shorewall-users@lists.shorewall.net
> http://lists.shorewall.net/mailman/listinfo/shorewall-users