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Re: routing problem?
- To: Cedar Cox <cedarc(at-nospam)visionforisrael.com>
- Subject: Re: routing problem?
- From: Dani Arbel <darbel(at-nospam)techunix.technion.ac.il>
- Date: Tue, 4 Sep 2001 10:35:12 +0300 (IDT)
- Cc: <linux-il(at-nospam)linux.org.il>
- Delivered-To: linux.org.il-linux-il@linux.org.il
- In-Reply-To: <Pine.LNX.4.21.0109032132360.13207-100000@nanu.visionforisrael.com>
- Sender: linux-il-bounce(at-nospam)cs.huji.ac.il
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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