unreachable host
Garrett Ellis
plug-discuss@lists.plug.phoenix.az.us
Mon, 30 Dec 2002 10:21:53 -0700
Pete,
The D-Link is acting as a DHCP server, and any device which gets an IP from
it cannot ping your other boxes? Is the D-link giving out 192.168.0/24
addresses? Also, when you try to ping the Linux machine from your Windows
box(es), are you pinging by IP or by hostname? Windows hosts on the same
subnet can resolve each other by hostname but unless you 1) provide name
resolution services for your network or 2) run Samba, your Windows hosts
will not know the name of your Linux machine and will only be able to
successfully ping it by IP.
Also, you said you have port forwarding on your linux host. Are you running
packet-filters? If so, is your linux host rejecting ICMP packets on eth1?
Ping uses ICMP, and if your Linux box blackholes or rejects it, it will seem
as though nothing can ping. This might be the case if computers coming
through your wireless LAN can get to the Internet but can't ping the gateway
which forwards their traffic.
Also, check the cable type used to connect your WAP to eth1. You might need
a crossover to go straight from the NIC to the WAP, or you might not. It's
definitely worth checking, though. Connectivity from the WAP to eth1 should
probably be verified first before exploring anything else I suggested in
this note.
Happy New Year.
Cheers,
Garrett
----- Original Message -----
From: "Darrell Shandrow" <nu7i@azboss.net>
To: <plug-discuss@lists.plug.phoenix.az.us>
Sent: Monday, December 30, 2002 9:23 AM
Subject: Re: unreachable host
> Hi Pete,
>
> Hmmm, interesting. Seems you've got a good stumper for me here; seems as
> though things should all work fine given its configuration. One thing to
> check: are all subnet masks 255.255.255.0 on the 192.168.0.0 network
> addresses? Also, from the Linux box on 192.168.0.10, can you ping the
Dlink
> and both computers behind it?
>
> Thanks.
>
>
>
> ----- Original Message -----
> From: "mazdaracer" <mazdaracer@earthlink.net>
> To: <plug-discuss@lists.plug.phoenix.az.us>
> Sent: Sunday, December 29, 2002 7:08 PM
> Subject: Re: unreachable host
>
>
> > Indeed I still could use help!
> >
> > Going from the external side inward:
> > DSL router connected to 3 boxes: 2 XP and my Linux
> > My Linux has 2 ethernet cards, eth0 and eth1.
> > Eth0 is the external and has a fixed IP;
> > eth1 is internal and is 192.168.0.10;
> > eth1 connects to the d link router, a wireless access point with 4 port
> > hub;
> > eth1 has port forwarding enabled;
> > the d link is ip 192.168.0.2 and I have the configuration as if the
> > assigned ip address is 192.168.0.3 from the isp.
> > gateway is assigned as .10, my eth1 address.
> > the d link is also acting as a dhcp server for the wifi and lan devices
> > connected thru its hub. Therefor the 2 laptops can connect to the
> > internet, and they can see each other, but I cannot see the linux box
> > via ping, ftp or as web server.
> >
> > Not concerned with the XP boxes. Just trying to get the laptops that are
> > connected to the D Link to access my main linux box, 192.168.0.10.
> >
> > Everything off eth1 is 192.168.0.x.
> >
> > I tried setting up the D Link with the virtual device settings per the
> > help. That is, a virtual ftp server as well as web giving the .10
> > address of my main linux box. But that doesn't seem to work.
> >
> > I have suspicions that it's the linux side that is having an issue,
> > since I can do a status of the system from the linux admin web page and
> > it shows it sees the windows 2000 box and gives its name, but it can't
> > get the name off the linux laptop! Yet when I reboot laptop2 (dual boot
> > box from work) it sees the name. Still can't ping the 0.10 box however
> > from either laptop.
> >
> > I figure it's the setup in the D Link more than anything else.
> > D Link DI-614+ is the device.
> >
> > Thanks for taking a shot at it!
> >
> >
> > On Sun, 2002-12-29 at 17:28, Darrell Shandrow wrote:
> > > Hi Pete,
> > >
> > > Though this looks like it should be a relatively simple network from
the
> > > available description, I can't totally understand how the devices have
> been
> > > physically connected; I can't read the diagram relationships between
the
> > > devices because I am blind. I can certainly assist you, but a text
> > > description of what is going on would certainly help.
> > >
> > > For instance, how are those two XP machines connected to the network?
> Via
> > > that Dlink hub/router combo, or some other way via that first RH 7.3
> box?
> > > Please feel free to continue this if you're still in need of an
assist.
> > >
> > > Thanks.
> > >
> > > ----- Original Message -----
> > > From: "mazdaracer" <mazdaracer@earthlink.net>
> > > To: "plug-discuss@lists.PLUG.phoenix.az.us"
> > > <plug-discuss@lists.plug.phoenix.az.us>
> > > Sent: Sunday, December 29, 2002 5:13 PM
> > > Subject: unreachable host
> > >
> > >
> > > > Perhaps a bit unusual for what may be the norm, but this is what
I've
> > > > got setup:
> > > >
> > > > + XP2 (public)
> > > > |
> > > > + XP1 (public)
> > > > |
> > > > DSL Router -+ [eth0 ]
> > > > [ Redhat 7.3 ]
> > > > [eth1 (192.168.0.10)]
> > > > [___________________]
> > > > |
> > > > |
> > > > [ dLink WiFi 614+ Router/Hub ]
> > > > [ LAN: 192.168.0.2 ]
> > > > [ WAN: 192.168.0.3 ]
> > > > [ Gateway: 192.168..10 ]
> > > > [___DHCP Svr 192.168.0.100 to 120_________]
> > > > | |
> > > > Lan WiFi
> > > > | |
> > > > Laptop2 Laptop1
> > > > (RH7.3) (W2k)
> > > > .102 .100
> > > >
> > > >
> > > > I can ping 102 > 100 and vice versa, but not .10
> > > > I tried setting the ISP assigned addr to all 0, but then I can't get
> > > > out, so I changed it to .3 and the dlink itself is .2. Now I can get
> out
> > > > to the net via .10.
> > > > Of course I can ping .2 from the laptops to get into the setup
program
> > > > for the dlink.
> > > >
> > > > Basically I'm not sure how to set up the router properly so I can
> access
> > > > my main box (.10) for ftp etc.
> > > >
> > > > pete
> > > >
> > > >
> > > >
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