networking problem
Gerhard Magnus
magnus at agora.rdrop.com
Fri Jun 19 14:32:55 UTC 2009
On Fri, 2009-06-19 at 15:52 +0930, Tim wrote:
> On Thu, 2009-06-18 at 14:40 -0700, Gerhard Magnus wrote:
> > I recently added a D-Link wireless router to a network in which
> > everything (except a new netbook computer) is connected by ethernet
> > cables. I also use static addresses. Here's the setup:
> >
> > DSL modem --> Linksys router --> D-Link router --> wireless netbook
> > |
> > -----------> eternetted computers
> >
> > Using a browser on the netbook I can access configuration menus for both
> > routers, which seems to indicate that the wireless network was set up
> > correctly and that the cable between the two routers is working.
>
> I use the same set up, also with a D-link wireless router. (Not too
> thrilled with it, I think their web configurator is a nightmare.)
>
> > I cannot access the configuration menu of the DSL modem from the
> > netbook, although I can do this from any of the other computers.
>
> That's common enough, it stops neighbours reconfiguring your router,
> remotely, by accident (e.g. if you have an unencrypted link), or by
> subterfuge (e.g. if they crack low grade encryption), since it's simply
> not accessible to them. There's a configuration option on many wireless
> routers about whether the configurator can only be accessed over the
> wired connection. Generally, this is a good idea.
>
> On some devices, they come preconfigured to use no encryption and allow
> remote configuration over the wireless connection. The first time a
> user configures their wireless device, they broadcast all their
> passwords in the clear, for anyone around them to hear. I make the
> first connection using a cable, then turn off the remote wireless access
> until I've finished securing the device.
>
> > Consistent with this, I cannot access the Internet from the netbook,
> > either with named or with IP addresses.
>
> Perhaps that's down to you using static addressing? On my system, I
> have a central DHCP server, and that tells all devices what the
> addresses and routes are. But the LAN side of my D-link doesn't seem to
> work with DHCP, I set *it* manually, the rest of my system is automatic.
>
> If you manually configure a device, you may have forgotten to set a
> route. If the wireless router is acting as a router, rather than as a
> dumb access point, it may not relay traffic through unless you've
> configured it with a gateway address.
>
> My D-link has manually set into it:
> its own address
> its netmask
> gateway address (my modem/router's LAN address, it's my gateway to
> the ISP)
>
> I'm guessing that you've missed the last one. Set your Linksys router's
> LAN IP address as your D-Link router's gateway address.
But where? I must be missing something obvious....
My D-link is a DIR-615. There seems to be only one relevant screen on
the configuration menu for network settings and it has these options:
Router Settings
Router IP Address: 192.168.1.2
Subnet Mask: 255.255.255.0
Device Name: dlinkrouter
Local Domain Name: SMAssociates
Enable DNS Relay: checked
DHCP Server Settings
Enable DHCP Server: unchecked (this leaves the other options blank)
DHCP IP Address Range:
DHCP Lease Time:
Always broadcast:
NetBIOS announcement:
Learn NetBIOS from WAN:
NetBIOS Scope:
NetBIOS node type:
Primary WINS IP Address:
Seconday WINS IP Address:
The "Advanced" page has entries for a list of virtual services (unused.)
The "Tools" page has password-setting and remote management menus. And
then there's "Gateway Name" which defaults to DIR-615 and doesn't seem
to be the place to put a gateway IP address.
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