Re: [gentoo-user] Routing problem ?

[Holla]

I redo the diagram to show the gw info.

Router1: UTSStarCom WA3002G4
         Wireless Router with 4 ethernet ports
         NAT is enabled (Just a tickbox)

PC1, PC2 : gentoo,  2.6.18.3 kernel
Router2: LinkSys WRT54GL (default firmware)
         used as access point
--------------------------------------------------
               192.168.1.1
               default gw: ISP net
               192.168.2.0 gw: 192.168.1.23
+-+           +------------+
| |-----------|  Router1   |=========ASDL conn
| |           +------------+
| |
| |
| |    192.168.1.23  +-------+  192.168.2.43
| |------------------|  PC1  |----))).............
+-+                  +-------+                   .
Passive Hub          gw: 192.168.1.1             .
                                                 .
                             192.168.2.1         .
                            +------------+       .
                            | W.AccessPt |--)))...
                            | (Router2)  |
                            +------------+
                               |
                            +------+
                            | PC2  |
                            +------+
                            192.168.2.24
                            gw: 192.168.2.43


Yo Yo wrote:
> btw, why don't you use the wireless on the ROUTER1 (doesn't seem you
> want to do any firewalling on the PC1)?

 Because this box is temporary, it will be replaced with a non-wireless
 one by the ISP.

 Richard Torres wrote:
> <snip> .. Unless you have 2 networks  that need to be separate only one is needed. If you have a wireless router, use it as a wireless access point and not a router. Which means turn off DHCP on the wireless router and don't configure or use the WAN connection.

This router is LinkSys WRT54GL with default firmware and I am using
it really as an access point. There is no option to disable the WAN
connection, so I left it as 'DHCP'.

> Depending on the capabilities of the router you can connect a LAN port on Router2 to your ADSL (Router1) router and assign an IP address that's in the same network as Router1.

I agree this would have simplified the network, but the problem is, I cannot
run a cable due to walls in between. The default firmware on LinkSys does
not provide a client option.  (Yes, I am aware of OpenWrt/DD-WRT etc )
I hope using the client option does not prevent the access point function.

reader wrote:
> By correct gateway  I think in this case it would be the inward facing
> address of pc1 (192.168.2.43) so on router2 you would set the gw to
> that address.

Already done.

> And on pc2 the gw would be  192.168.2.1.  That is unless router2 is
> just a WAP (wireless access point).

As router is just a WAP, the gw is set to 192.168.2.43.


kashani wrote:
> Router1 is the NAT device and everything else is internal or so I
> assumed. You don't want NAT behind NAT on your network if you can help
> it. It tends to break things and is hard to troubleshoot.

I just ticked the 'Enable NAT' tickbox in the router configuration.

> PC1 does need to have IP forwarding turned on which the original poster
> mentioned he configured.

Yes, this is done.


>The tests I would run are:
>
> ping 192.168.2.43 from router1. That'll test that router1 knows how to
> get to 192.168.2.0. I don't think packet forwarding has to be working
> for this to return since the interfaces are all local on PC1.

Ping is ok.

> ping router 1 from PC2 and vice versa. That'll make sure that PC1 is
> forwarding packets correctly.

Ping is ok.

> If both of these are fine, it's possible the router1 is not NATing
> 192.168.2.0/24 addresses.

Do you think an ISP would allow only one LAN segment (like 192.168.1.x)
and not allow 192.168.2.x at the same time ? Is there any incentive
for them ?


One thing, I cannot understand is the difference in traceroute
results. What does this say in plain english ? :-)

At PC2
 # traceroute  218.248.240.46  (ISP's DNS server)
traceroute to 218.248.240.46 (218.248.240.46), 30 hops max, 40 byte packets
 1  192.168.2.43 (192.168.2.43)  1.730 ms  0.840 ms  0.920 ms
 2  192.168.1.1 (192.168.1.1)  1.440 ms  1.469 ms  1.287 ms
 3  * * *
 4  * * *

At PC1

 # traceroute  218.248.240.46
traceroute to 218.248.240.46 (218.248.240.46), 30 hops max, 40 byte packets
 1  192.168.1.1 (192.168.1.1)  0.848 ms  0.706 ms  0.681 ms
 2  117.192.128.1 (117.192.128.1)  19.712 ms  18.878 ms  19.920 ms
 3  218.248.160.134 (218.248.160.134)  19.292 ms  19.796 ms  19.190 ms



--
sathish
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