7. Any one care to interpret the routing table in the attached file (attroute)? Please only interpret one column per person.

For this conference I've added some more information to what was already talked about.  There was also one error noted.  I replaced the flag B, which I couldn't find reference to, with the flag G, which does reference that the route uses a gateway

[guster@underdark /sbin]$ ./route

Kernel IP routing table

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface

10.0.0.0        *               255.255.255.0   U     0      0        0 eth1

199.17.59.0     *               255.255.255.0   U     0      0        0 eth0

192.168.2.0     *               255.255.255.0   U     0      0        0 eth0

199.17.40.0     199.17.59.254   255.255.255.0   UG    0      0        0 eth0

127.0.0.0       *               255.0.0.0       U     0      0        0 lo

default         199.17.59.254   0.0.0.0         UG    0      0        0 eth0 

The second column of netstat's output shows the gateway the routing entry points to. If no gateway is used, an asterisk is printed instead. Column three shows the ``generality'' of the route. When given an IP-address to find a suitable route for, the kernel goes through all routing table entries, taking the bitwise AND of the address and the genmask before comparing it to the target of the route.

Flags - there are several options that can be set, to include:

G The route uses a gateway.

U The interface to be used is up.

H Only a single host can be reached through the route. For example, this is the case for the loopback entry 127.0.0.1.

D This route is dynamically created.

M This route is set if the table entry was modified by an ICMP redirect message.

! The route is a reject route and datagrams will be dropped

 The Ref column of netstat's output shows the number of references to this route, that is, how many other routes (e.g. through gateways) rely on the presence of this route. The last two columns show the number of times the routing entry has been used, and the interface that datagrams are passed to for delivery.

The Iface column lists the local interface associated with getting to the destination IP.

10. If packets are source routed where is the source routing information stored in the packet (look in the ip header)?

I think that the source routing information is contained on the options portion of the IP header, which follows the destination address.  Source