Quick Routing Question

[Steve Bertrand]

> -----Original Message-----
> From: owner-freebsd-questions at freebsd.org 
> [mailto:owner-freebsd-questions at freebsd.org] On Behalf Of Jason Morgan
> Sent: Tuesday, November 01, 2005 11:03 AM
> To: FreeBSD Questions
> Subject: Re: Quick Routing Question
> 
> On Tue, Nov 01, 2005 at 10:25:25AM -0500, Steve Bertrand wrote:
> > 
> > > Destination        Gateway            Flags    Refs      
> Use  Netif 
> > > Expire
> > > default            70.183.13.193      UGS         0    
> 24701    xl0
> > > 10/24              link#3             UC          0       
>  0   fxp0
> > > 10.0.0.1           00:d0:b7:44:f9:c6  UHLW        0      
> 903    lo0
> > > 10.0.0.2           00:50:8d:e5:a5:41  UHLW        0   322468  
> > >  fxp0    572
> > > 10.0.0.4           00:e0:98:04:01:f6  UHLW        0     1131  
> > >  fxp0   1140
> > > 70.183.13.192/26   link#2             UC          0       
>  0    xl0
> > > 70.183.13.193      00:13:5f:00:f0:ee  UHLW        1        0  
> > >   xl0   1188
> > > 70.183.13.213      00:50:04:cf:52:8a  UHLW        0       
> 18    lo0
> > > 127.0.0.1          127.0.0.1          UH          0       
>  0    lo0
> > > 192.168.1          link#1             UC          0       
>  0    dc0
> > 
> > Ok, this looks ok. The 10/24 network *should* be able to see/route 
> > anything back and forth to the 192.168.1/24 network without 
> difficulty.
> > 
> > Now, I can't remember if you said how this was cabled, but 
> this is how 
> > I set up my wifi networks:
> > 
> > - plug the wireless network interface in the FBSD router 
> into one of 
> > the LAN switch ports on the wireless AP/router (if indeed 
> it is a router).
> > The IP address on the LAN side of the AP is irrelevant, so 
> long as you 
> > don't conflict with another IP.
> 
> Yes, that's what I've done.
> 
> > - Give the wireless laptop a static IP inside the wireless IP subnet
> 
> As soon as I can get the Linksys set up, I will.
> 
> > - Have nothing plugged into the WAN side of the wireless AP, as you 
> > don't want routing with that unit, you just want a layer-2
> > (bridged/switched) AP.
> 
> Correct.
> 
> > - effectively, if you have wireless connectivity from the laptop to 
> > the AP, you should be able to ping the FW, and vice-versa
> 
> Checking to make sure the wireless router is routing now, but 
> I can ping from the FreeBSD gateway to the router (as well as 
> hit the web setup with lynx).

Ok, slick...you are more than half way there. Carry on with bringing
over a client to the wireless side of things (even if it's just cabled
into the Linksys for now), to see if you can get through the AP, to the
router. Then proceed to try to ping the cabled iface of the FBSD box
from said client. If you can do that, then try a wireless client, to
ensure the problem doesn't stem from wifi connectivity.

And again, tcpdump is a very good tool. The -i switch tells it what
interface to listen on, so if the wireless side of the router works but
you can't ping across to the cabled side, then apply the cabled
interface to the -i switch and you'll be able to see if traffic is
making that far, and if it is, if it's even attempting to go back.

Cheers, and good luck!

Steve