John Hasler wrote:
> If the modem is configured as a bridge it won't speak IP to the server:
> just PPP (over ethernet). To get to the Internet via the modem the
> other systems would need to speak PPP.
So it's possible to bypass the "firewall" by using PPP? Ugh
Chris
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On Tue, 2011-02-15 at 03:12 -0500, shawn wilson wrote:
[... snipped instructions for setting up machine as gateway and
router ...]
I wasn't the OP, I already had a working setup.
If the OP is still reading this branch of the thread he must surely be
convinced that a second NIC is the way to go ;-
shawn wilson a écrit :
>
> on your server, configure eth0 and eth0:0 (or eth0:1, or whatever you
> like). setup pppoe to use one of those interfaces.
eth0:0 is not an interface, it is a label for an 'IP alias', i.e.
another IPv4 address on eth0. You cannot use it with pppoe which
requires an ethe
Tixy a écrit :
> On Mon, 2011-02-14 at 11:19 +0100, Pascal Hambourg wrote:
>> Tixy a écrit :
>>> The server uses PPPoE to talk to the modem, which translates this into
>>> PPPoA to get to my IPSs equipment.
>>
>> Are you sure of this ? Isn't your modem rather working as a plain
>> ethernet bridge,
i'm not going to comment on the security of this (mainly spoofing a mac
address), but will instead comment on how to do this. you'll need a hub or
switch and ethernet cable (obviously).
take your 'modem' and hook it up to the device, take the computer(s) and
hook them up to the device.
on your ser
On Mon, 2011-02-14 at 11:19 +0100, Pascal Hambourg wrote:
> Tixy a écrit :
> >
> > The server uses PPPoE to talk to the modem, which translates this into
> > PPPoA to get to my IPSs equipment.
>
> Are you sure of this ? Isn't your modem rather working as a plain
> ethernet bridge, just transparen
On Mon, 2011-02-14 at 11:19 +0100, Pascal Hambourg wrote:
> Tixy a écrit :
> >
> > The server uses PPPoE to talk to the modem, which translates this into
> > PPPoA to get to my IPSs equipment.
>
> Are you sure of this ? Isn't your modem rather working as a plain
> ethernet bridge, just transparen
John Hasler a écrit :
>
> If the modem is configured as a bridge it won't speak IP to the server:
> just PPP (over ethernet).
Even working as a plain ethernet bridge, an ADSL modem usually has an IP
stack for management purpose. Also a bridge does not speak PPP, it just
lets PPPoE (an other ether
Tixy a écrit :
>
> The server uses PPPoE to talk to the modem, which translates this into
> PPPoA to get to my IPSs equipment.
Are you sure of this ? Isn't your modem rather working as a plain
ethernet bridge, just transparently forwarding the PPPoE traffic between
its ADSL and ethernet ports ? I
Tixy a écrit :
>
>> I know this can be done, but is generally not recommended, unless you
>> have very good reasons not to put a second ethernet card in the server
>> and do it properly.
>
> My server is a SheevaPlug [2], so no room for another NIC ;-)
Then a VLAN-capable switch comes in handy.
Andrei Popescu a écrit :
> On Sb, 12 feb 11, 18:18:24, Tixy wrote:
>> Would another option not be to just get a switch and not bother with a
>> second Ethernet card in the server? This is the setup I run, i.e.
>>
>> Modem <-> ++
>> Firewall/Server <---> | Switch |
>> Other
Hello,
Jason Hsu a écrit :
> I'm in the process of setting up an old computer as a firewall and
> server. It needs to connect to my DSL modem AND my main computer.
> However, this old computer (like every other computer I've had) only has
> one Ethernet port. I know this is old hat for many of y
On Feb 13, 2011, at 9:09 AM, Tixy wrote:
(I don't discount me getting something horribly wrong, this setup is
only a few weeks old and my first foray into firewalls and routing.)
Computer security is so much fun! /-;
As others have pointed out, it is *possible* for an attacker to get
dir
Chris writes:
> Unless there's something strange about your configuration, I don't see
> how the firewall can firewall in this instance. Can you give me a good
> reason why "Other system(s)" shouldn't be able to access the Internet
> directly via the modem?
If the modem is configured as a bridge i
Tixy wrote:
> Would another option not be to just get a switch and not bother with a
> second Ethernet card in the server? This is the setup I run, i.e.
> Modem <-> ++
> Firewall/Server <---> | Switch |
> Other system(s) <---> ++
Unless there's something strang
On Sun, 2011-02-13 at 09:17 -0600, John Hasler wrote:
> Andrei writes:
> > You seem to assume it is impossible for a packet to reach one of the
> > other internal computers without taking the detour via the server (and
> > it's firewall). Maybe I'm paranoid, but I wouldn't base the security
> > of
Andrei writes:
> You seem to assume it is impossible for a packet to reach one of the
> other internal computers without taking the detour via the server (and
> it's firewall). Maybe I'm paranoid, but I wouldn't base the security
> of my internal network on this assumption.
If I understand correct
On Sun, 13 Feb 2011 14:09:12 +, Tixy wrote:
> On Sun, 2011-02-13 at 15:02 +0200, Andrei Popescu wrote:
>> Correct me if I'm wrong, but this means you have two IPs on the same
>> interface, one is public and one is RFC 1918 and all your internal
>> computers are connected directly to the big b
On Du, 13 feb 11, 14:09:12, Tixy wrote:
>
> It's not like that, my server's Ethernet interface only has one,
> private, IP address.
>
> The server uses PPPoE to talk to the modem, which translates this into
> PPPoA to get to my IPSs equipment. So once my server has 'dialled' my
> ISP the ppp inte
On Sun, 2011-02-13 at 15:02 +0200, Andrei Popescu wrote:
> On Du, 13 feb 11, 11:35:12, Tixy wrote:
>
> > I couldn't see any practical reason for a second Ethernet interface
> > anyway. There's performance issues when input and output traffic share a
> > single interfaces, but as my ADSL speed is <
On Du, 13 feb 11, 11:35:12, Tixy wrote:
> I couldn't see any practical reason for a second Ethernet interface
> anyway. There's performance issues when input and output traffic share a
> single interfaces, but as my ADSL speed is <2% of that of the servers
> Gigabit Ethernet adaptor, that doesn't
On Sun, 2011-02-13 at 12:55 +0200, Andrei Popescu wrote:
> On Du, 13 feb 11, 09:22:56, Tixy wrote:
> > On Sun, 2011-02-13 at 03:01 +0200, Andrei Popescu wrote:
> > > On Sb, 12 feb 11, 18:18:24, Tixy wrote:
> > > >
> > > > Would another option not be to just get a switch and not bother with a
> > >
On Du, 13 feb 11, 09:22:56, Tixy wrote:
> On Sun, 2011-02-13 at 03:01 +0200, Andrei Popescu wrote:
> > On Sb, 12 feb 11, 18:18:24, Tixy wrote:
> > >
> > > Would another option not be to just get a switch and not bother with a
> > > second Ethernet card in the server? This is the setup I run, i.e.
On Sun, 2011-02-13 at 03:01 +0200, Andrei Popescu wrote:
> On Sb, 12 feb 11, 18:18:24, Tixy wrote:
> >
> > Would another option not be to just get a switch and not bother with a
> > second Ethernet card in the server? This is the setup I run, i.e.
> >
> > Modem <-> ++
> > F
On Sb, 12 feb 11, 18:18:24, Tixy wrote:
>
> Would another option not be to just get a switch and not bother with a
> second Ethernet card in the server? This is the setup I run, i.e.
>
> Modem <-> ++
> Firewall/Server <---> | Switch |
> Other system(s) <---> ++
On Fri, 2011-02-11 at 23:02 +, Chris Davies wrote:
> > If I use a regular Ethernet cable to connect the firewall/server
> > computer to the DSL modem, would it work to use an Ethernet cross-cable
> > and USB-to-Ethernet adapters to provide the connection to my main
> > computer? Are there USB-
On 12 February 2011 22:54, Rob Owens wrote:
> On Fri, Feb 11, 2011 at 02:21:30PM -0600, Jason Hsu wrote:
> > On Fri, 11 Feb 2011 12:17:24 -0800
> > David Christensen wrote:
> > >
> > > 3. Netgear fast Ethernet (red) and Gigabit (green and orange) switches
> > > with normal/ cross-over auto-sens
On Fri, Feb 11, 2011 at 02:21:30PM -0600, Jason Hsu wrote:
> On Fri, 11 Feb 2011 12:17:24 -0800
> David Christensen wrote:
> >
> > 3. Netgear fast Ethernet (red) and Gigabit (green and orange) switches
> > with normal/ cross-over auto-sensing.
> >
> What are the differences among a switch, hub
On Vi, 11 feb 11, 13:37:10, Jason Hsu wrote:
> I'm in the process of setting up an old computer as a firewall and
> server. It needs to connect to my DSL modem AND my main computer.
> However, this old computer (like every other computer I've had) only
> has one Ethernet port. I know this is
On 02/11/2011 12:21 PM, Jason Hsu wrote:
What are the differences among a switch, hub, and router? I know that they are
used in networking, but I don't understand what setups they are appropriate for.
There's going to be a lot of information available on the WWW, but as I
understand it:
*
Jason Hsu wrote:
> I'm in the process of setting up an old computer as a firewall and
> server. It needs to connect to my DSL modem AND my main computer.
> However, this old computer (like every other computer I've had) only
> has one Ethernet port.
> What do I need to connect my firewall/server
On Fri, 11 Feb 2011 12:17:24 -0800
David Christensen wrote:
>
> 3. Netgear fast Ethernet (red) and Gigabit (green and orange) switches
> with normal/ cross-over auto-sensing.
>
What are the differences among a switch, hub, and router? I know that they are
used in networking, but I don't unde
On 02/11/2011 11:37 AM, Jason Hsu wrote:
I'm in the process of setting up an old computer as a firewall and server. It
needs to connect to my DSL modem AND my main computer. However, this old
computer (like every other computer I've had) only has one Ethernet port. I
know this is old hat fo
From: Jason Hsu
Date: Fri, 11 Feb 2011 13:37:10 -0600
> What do I need to connect my firewall/server computer to a DSL modem AND
> another computer?
My notes here might help a little. I have a special talent for errors.
If something is puzzling, ask.
http://carnot.yi.org/NetworksPage.ht
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