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Networking Two routers with Static Public IPs

 
 
QuickFix
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      05-26-2004, 12:57 PM
I've just switched to Freedom2Surf after escaping the claws of NTL. I
decided to get myself an extra 4 IP numbers so I could have an educational
play about with some servers I've been configuring.

I've setup my network using a Zoom X3 (5660) 1 Port ADSL Router, connected
to a Netgear 6 Port Hub. Connected to that hub is a debian linux server and
a LinkSys WRT56G Wireless 4 Port Broadband Router connected to the wireless
router is my private network.

This setup worked fine last night when the zoom's LAN had private IPs in the
10.0.0.x range and the wireless router had private IPs (192.168.1.x).

Now I've configured my Zoom to use Public IPs for it's LAN, switched off
it's NAT and assigned the wireless router a Public IP (keeping the
192.168.1.x range and NAT for its internal side) My debian server is also
allocated a Public IP. The wireless router is told to use the Zoom as its
default gateway.

You can see a representation of my setup here:
http://212.13.209.135/adsl/networkconfig.JPG

Now - I can ping my internal machines, either in the Private range or the
Public range, but I'm not getting any routing to the internet. If I try to
ping the bbc.co.uk for instance, I get "Destination Host Unreachable".

Am I right in assuming I need to configure the routing table on the wireless
router? It seems to have one setup at the moment but as far as I can tell it
only has routes to my Public IP range and my Private IP range, nothing else.
I've tried adding 0.0.0.0 to use the Zoom gateway IP, but I get an error
message and can't save it.

*Phew* I hope all this makes sense, I'd really appreciate some help on this
one.. I'm fairly new to routing, but have a general understanding of IP and
Linux / Windows networking.

TIA
QuicFix


 
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Rob Morley
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      05-26-2004, 02:02 PM
In article <(E-Mail Removed)>, "QuickFix"
(E-Mail Removed) says...
> I've just switched to Freedom2Surf after escaping the claws of NTL. I
> decided to get myself an extra 4 IP numbers so I could have an educational
> play about with some servers I've been configuring.
>
> I've setup my network using a Zoom X3 (5660) 1 Port ADSL Router, connected
> to a Netgear 6 Port Hub. Connected to that hub is a debian linux server and
> a LinkSys WRT56G Wireless 4 Port Broadband Router connected to the wireless
> router is my private network.
>
> This setup worked fine last night when the zoom's LAN had private IPs in the
> 10.0.0.x range and the wireless router had private IPs (192.168.1.x).
>
> Now I've configured my Zoom to use Public IPs for it's LAN, switched off
> it's NAT and assigned the wireless router a Public IP (keeping the
> 192.168.1.x range and NAT for its internal side) My debian server is also
> allocated a Public IP. The wireless router is told to use the Zoom as its
> default gateway.
>
> You can see a representation of my setup here:
> http://212.13.209.135/adsl/networkconfig.JPG
>
> Now - I can ping my internal machines, either in the Private range or the
> Public range, but I'm not getting any routing to the internet. If I try to
> ping the bbc.co.uk for instance, I get "Destination Host Unreachable".
>
> Am I right in assuming I need to configure the routing table on the wireless
> router? It seems to have one setup at the moment but as far as I can tell it
> only has routes to my Public IP range and my Private IP range, nothing else.
> I've tried adding 0.0.0.0 to use the Zoom gateway IP, but I get an error
> message and can't save it.
>

Presumably the default route is implicit, which is why it won't let you
set another one. Can the Debian machine see the internet okay? Can the
private machines ping internet hosts by IP address?
 
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QuickFix
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      05-26-2004, 02:15 PM

"Rob Morley" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) t...
> In article <(E-Mail Removed)>, "QuickFix"
> (E-Mail Removed) says...
> > I've just switched to Freedom2Surf after escaping the claws of NTL. I
> > decided to get myself an extra 4 IP numbers so I could have an

educational
> > play about with some servers I've been configuring.
> >
> > I've setup my network using a Zoom X3 (5660) 1 Port ADSL Router,

connected
> > to a Netgear 6 Port Hub. Connected to that hub is a debian linux server

and
> > a LinkSys WRT56G Wireless 4 Port Broadband Router connected to the

wireless
> > router is my private network.
> >
> > This setup worked fine last night when the zoom's LAN had private IPs in

the
> > 10.0.0.x range and the wireless router had private IPs (192.168.1.x).
> >
> > Now I've configured my Zoom to use Public IPs for it's LAN, switched off
> > it's NAT and assigned the wireless router a Public IP (keeping the
> > 192.168.1.x range and NAT for its internal side) My debian server is

also
> > allocated a Public IP. The wireless router is told to use the Zoom as

its
> > default gateway.
> >
> > You can see a representation of my setup here:
> > http://212.13.209.135/adsl/networkconfig.JPG
> >
> > Now - I can ping my internal machines, either in the Private range or

the
> > Public range, but I'm not getting any routing to the internet. If I try

to
> > ping the bbc.co.uk for instance, I get "Destination Host Unreachable".
> >
> > Am I right in assuming I need to configure the routing table on the

wireless
> > router? It seems to have one setup at the moment but as far as I can

tell it
> > only has routes to my Public IP range and my Private IP range, nothing

else.
> > I've tried adding 0.0.0.0 to use the Zoom gateway IP, but I get an error
> > message and can't save it.
> >

> Presumably the default route is implicit, which is why it won't let you
> set another one. Can the Debian machine see the internet okay? Can the
> private machines ping internet hosts by IP address?


I cannot ping internet hosts by IP address from any of my machines.

Q-f


 
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Rob Morley
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      05-26-2004, 05:23 PM
In article <(E-Mail Removed)>, "QuickFix"
(E-Mail Removed) says...
>

<snip>
> I cannot ping internet hosts by IP address from any of my machines.
>

That suggests that the problem is with the ADSL router. I suspect it's
a problem with your LAN netmask. Seems to me you have four public IPs -
that's a network address, a broadcast address and two host addresses,
but you're running three hosts - maybe that's the problem?
 
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Nig
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      05-28-2004, 09:30 PM
QuickFix wrote:

>>>I've tried adding 0.0.0.0 to use the Zoom gateway IP, but I get an error
>>>message and can't save it.
>>>

>>
>>Presumably the default route is implicit, which is why it won't let you
>>set another one. Can the Debian machine see the internet okay? Can the
>>private machines ping internet hosts by IP address?

>
>
> I cannot ping internet hosts by IP address from any of my machines.


I suspect that the issue is that the ISP's routers don't know that to
get to 195.xxx.xx9 net it needs to go via 195.xxx.xx7.

If you post the full address I'll traceroute it for you and we'll see
where it's going.
 
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