IPIP Tunnels Problem

["Bradley Schatz" <bradley () tripledash com>]

Hi,

I am further attempting to configure an IPIP tunnel under Linux 2.4.6 .
When trying to ping the remote tunnel's IP, I can see with ethereal over
the
public interface IPIP encapsulated ICMP echo requests going to the
destination, and the responding IPIP encapsulated echo responses back.

When I examine the tunl1 interface with ethereal, I can only see the
echo requests going out over the tunnel, but no responses coming back
in.

Interestingly, the machine is sending ICMP host unreachable (protocol
unreachable) unencapsulated, back to the remote gateway. Remote host is
a freeBSD box.

The tunnel is set up with the following:

MY_EXTERNAL_ADDR="ww.xx.yy.zz"
REMOTE_GW_ADDR="aa.bb.cc.dd"
REMOTE_TUNNEL_ADDR="10.0.0.6"
LOCAL_TUNNEL_ADDR="10.0.0.5"

ip tunnel add tunl1 mode ipip remote $REMOTE_GW_ADDR local
$MY_EXTERNAL_ADDR ttl 255
ip addr add $LOCAL_TUNNEL_ADDR peer $REMOTE_TUNNEL_ADDR dev tunl1
ip link set tunl1 up
ip route add 10.0.0.6 via $REMOTE_GW_ADDR dev tunl1 onlink


Any suggestions what am I doing wrong here?


thanks

bradley











bradley schatz

solutions architect
_ tripledash /

phone    +44 020 7377 07 75
fax      +44 020 7247 69 30
mobile +44 07947 58 07 18

www.tripledash.co.uk 


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