Kevin Coyner, 2002-Nov-07 16:55 -0500:
> 
> On Thu, Nov 07, 2002 at 12:20:52PM -0800, Jeff wrote......
> > > 
> > > sumida:/etc/init.d# cat /proc/net/ip_conntrack
> > > <snip>
> > > udp  17 9 src=10.10.10.156 dst=192.168.2.254 sport=1059 dport=53
> > > [UNREPLIED] src=192.168.2.254 dst=192.168.2.254 sport=53 dport=1059
> > > use=1
> > > udp  17 17 src=10.10.10.156 dst=167.206.112.4 sport=1061 dport=53
> > > [UNREPLIED] src=167.206.112.4 dst=192.168.2.254 sport=53 dport=1061
> > > use=1
> > > 
> > > The first destination (192.168.2.254) is the router.  The second dest is
> > > a DNS server on the outside world.  In both cases the [UNREPLIED]
> > > message is appended.  Is that the proxy box 'not replying'?
> > 
> > Ah, when you ping the world, are you pinging using a domain name or an
> > IP?
>  
> I'm using an IP, not a domain name. It seems to try the ICMP ping packet
> first ....
> 
> icmp     1 29 src=10.10.10.156 dst=66.70.90.121 type=8 code=0 id=22790
> [UNREPLIED] src=66.70.90.121 dst=10.10.10.156 type=0 code=0 id=22790
> use=1
> udp      17 8 src=10.10.10.156 dst=167.206.112.3 sport=1112 dport=53
> [UNREPLIED] src=167.206.112.3 dst=10.10.10.156 sport=53 dport=1112 use=1
> 
> .... and then when it doesn't get a reply, it tries sending a udp packet
> to the DNS server (I've no idea why it does this).
> 
> Separately, I'm able to sit at sumida the proxy box and ping everything
> and anything, both by ip and DN.  
> 
> > I appears you are using a domain name and it's not getting resolved.
> > According to he cat above, your router is may be droping the DNS
> > requests.  Could this router be doing a DNS proxy?  Try setting the
> > DNS IP on your client and sumida to 192.168.10.254 and see if it
> > works.  Also, where did 192.168.2.254 come from?  According to you
> > original post, the network between sumida and the router is
> > 192.168.10.0.
> 
> I tried changing the ip's for the DNS as you suggested ... no success.
> The network was 192.168.10.0.  As part of mucking up the whole system, I
> changed it at one point.  It is now 192.168.2.0.  I'm quite sure that I
> was consistent with my changes throughout both boxes.
> 
> > One last thing, can you client ping 192.168.10.254?  That would prove
> > that sumida is forwarding.
>  
> The client is not able to ping 192.168.2.254 (used to be
> 192.168.10.254). It can, however, ping the sumida the proxy box, both by
> IP and by pinging sumida the DN.
> 
> Banging head against wall at this point.  This should be
> straightforward.

Oh! Oh! Oh!  The router doesn't know about the 10.0.0.0 network.  It
needs a static route to 192.168.2.150 to reach the 10.0.0.0/24
network.  That's why!  The traffic leaves fine, the router doesn't
know where to send the responding traffic to reach 10.0.0.?.

This has to be it!
jc

--
Jeff Coppock            Systems Engineer
Diggin' Debian          Admin and User


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