[olug] Re: Wireless Help

[Joe Catanzaro]

Dan,

Thanks for the reply. Yes, I didn't have a route pointing from my 
firewall/default gateway to the 10.0.1.0/24 subnet. Also, I ran tcpdump on 
the firewall and the RH 7.3 box and the ICMP traffic is reaching its 
destination, but not properly returning. I've added 2 routes on the RH 7.3 
box. One for traffic coming from my wireless subnet, and one for traffic 
coming from my wired subnet. I've also added a route on my firewall for 
traffic headed toward the wireless subnet. And after all that, pings still 
aren't hitting their targets. I've been using the following route command. 
Am I doing something wrong?

route add -net 10.0.1.0 netmask 255.255.255.0 dev wlan0

And I've been trying to duplicate the table at the bottom of this 
page.   http://www.busan.edu/~nic/networking/tcpip/ch02_05.htm

Also, here are my current routing tables.

RH 7.3 Box
[root at scooter root]# netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
10.0.0.0        10.0.0.5        255.255.255.0   UG       40 0          0 eth0
10.0.0.0        0.0.0.0         255.255.255.0   U        40 0          0 eth0
10.0.1.0        10.0.1.1        255.255.255.0   UG       40 0          0 wlan0
10.0.1.0        0.0.0.0         255.255.255.0   U        40 0          0 wlan0
127.0.0.0       0.0.0.0         255.0.0.0       U        40 0          0 lo
0.0.0.0         10.0.0.1        0.0.0.0         UG       40 0          0 eth0

Firewall
[root at ip68-96-137-74 rc.d]# netstat -nr
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
10.0.0.0        0.0.0.0         255.255.255.0   U        40 0          0 eth1
10.0.1.0        10.0.0.5        255.255.255.0   UG       40 0          0 eth1
68.96.136.0     0.0.0.0         255.255.252.0   U        40 0          0 eth0
127.0.0.0       0.0.0.0         255.0.0.0       U        40 0          0 lo
0.0.0.0         68.96.136.1     0.0.0.0         UG       40 0          0 eth0

Any ideas on what I'm doing wrong?

Thanks,




At 10/22/2003 11:33 AM Wednesday, you wrote:
>Joe wrote:
> > I can ping the RH wi-fi interface (10.0.1.1) from the laptop and I
> > can also ping the wired interface (10.0.0.5) from the laptop, but
>nothing
> > beyond that. So, I'm assuming I have a routing issue on the RH box.
>I'm
> > missing something obvious, but I don't know what. Here are the
>details.
> > Any ideas?   Thanks,
>
>www   ---   Firewall     ---     RH 7.3 box     ~~~     Win 98 laptop
>                    10.0.0.1         10.0.0.5  10.0.1.1
>10.0.1.38
>
>If you are able to ping both interfaces of the RH7.3 "router" device
>from the Win98 laptop, then the routing/forwarding piece appears to be
>working.
>
>When you ping something on the 10.0.0.X/24 network, does that machine
>have a route entry for the 10.0.1.X/24 network?  Example:  If you have
>another machine at 10.0.0.50, does it have a route to the 10.0.1.X/24
>network pointing to 10.0.0.5?  I would guess that the packet is making
>it to .50, but then .50 is sending the response via 10.0.0.1 rather than
>10.0.0.5.
>
>Depending on the other systems you have, you could use either Ethereal
>or tcpdump on the 10.0.0.50 machine to see if it is seeing the traffic.
>
>Dan
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Joe Catanzaro
joecatanzaro at cox.net