[Wlug] DNS and PPP

[Jamie Guinan]

On Thu, 17 Aug 2006, Andy Stewart wrote:

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> 
> HI gang,
> 
> I have a setup like this:
> 
> palmtx  ->  computer  -->  firewall/dns_server
> 
> The connection between the palmtx and the computer is a PPP connection
> (ppp0) over bluetooth, which works fine between the palmtx and the computer.
> 
> The connection between the computer and the firewall is ethernet (eth0),
> and it also works fine.
> 
> My problem is that I can't get the palmtx to get dns responses back from
> the dns server.
> 
> I ran ethereal on eth0 and ppp0.  I can see the DNS query go from the
> palmtx to the computer, and out to the firewall on eth0.  The firewall
> responds onto eth0, but the computer doesn't seem to be sending that
> back to the palmtx on ppp0.
> 
> On the computer, routing is enabled (or the dns server wouldn't have
> seen the initial request). The route table has the entry (1st in the
> list) for the PPP connection.
> 
> iptables is set to accept everything.
> 
> What did I miss?
> 
> Thanks!
> 
> Andy

Hi Andy,

So are you doing NAT for the palmtx via the computer?

What about,

  $ cat /proc/sys/net/ipv4/ip_forward

Is it set to "1"?  

-Jamie