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Re: routing problem?



Cedar,
maybe you might have some path mtu discovery problem?
try to tcpdump/ethereal on B and C and see what hapens.

About the routing table:
more specific routes has precedence when being looked on for routing, so
the routing tables look ok (though may be simplified).
Dani

On Mon, 3 Sep 2001, Cedar Cox wrote:

>
> I'm not exactly sure what's going on here.  This is the setup:
>
>   A ==== B -------- C ==== D
>
> A, B, and C are running linux, D happens to be a running windows, if it
> matters.  The A-B link is ethernet, as is C-D.  B-C is a CIPE link over
> the internet (a VPN).
>
>  A is 192.168.1.4
>  B is 192.168.1.1 and 10.0.1.1
>  C is 192.168.2.1 and 10.0.1.2
>  D is 192.168.2.2
>
> I have the default route on A pointing to B, on D pointing to C.  On B I
> have:
>
> Destination     Gateway         Genmask         Flags Metric Ref    Iface
> 10.0.1.2        *               255.255.255.255 UH    0      0        cipcb0
> 192.168.2.0     10.0.1.2        255.255.255.0   UG    0      0        cipcb0
> 192.168.1.0     *               255.255.255.0   U     0      0        eth0
> 192.168.0.0     *               255.255.240.0   U     0      0        eth1
> 10.0.0.0        *               255.0.0.0       U     0      0        eth2
> loopback        *               255.0.0.0       U     0      0        lo
>
> On C I have:
>
> Destination     Gateway         Genmask         Flags Metric Ref    Iface
> 10.0.1.1        *               255.255.255.255 UH    0      0        cipcb0
> 192.168.2.0     *               255.255.255.0   U     0      0        eth0
> 192.168.0.0     10.0.1.1        255.255.240.0   UG    0      0        cipcb0
> 10.0.0.0        *               255.0.0.0       U     0      0        eth1
> loopback        *               255.0.0.0       U     0      0        lo
>
>
> What I can't do is telnet from B to D (port 5800.. VNC), but I can telnet
> from A to D.  I'm not sure how I might have messed up my routing or
> something else.  Maybe it's my Genmask's.  The "strange" thing is that I
> can ping D from A or B without problem.  A traceroute from A to D looks
> like:
>
> traceroute to D
>  1  B (192.168.1.4)  2.514 ms  1.572 ms  1.229 ms
>  2  * * *
>  3  D (192.168.2.2)  62.168 ms  64.307 ms  58.755 ms
>
> If this is not enough information, just say so and I'll give more.  Maybe
> I'll get creative and draw some ascii art of the big picture.. :)
>
> Thanks
> -Cedar
>
>
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