[mod.protocols.tcp-ip] HOST TABLE REDUCTION

ron@BRL.ARPA.UUCP (02/19/87)

I just got some neat automatic mail messages about the internet
host table domain cleanup which points out to me some additional
silliness going on.  Why (this is rhetorical, I know why) are there
hosts listed in the INTERNET HOST TABLE that are not INTERNET HOSTS.
A host on our IMP, PERDIMS-38, is an X.25 PAD, and doesn't know IP
from a hole in the ground.  Yet it is Port 9 on IMP 29 so someone
crafted up a 26.9.0.29 address for it.

-Ron

Mills@UDEL.EDU.UUCP (02/21/87)

Ron,

I'm not worried about that or even those Honeybunch and Sperrysys X.25 gizmos
there, since the table predates IP/TCP anyway. After all, this is an internet
table, not only an Internet table.

Having said that, the challenge for the student is how to fool a triple-X
PAD into connecting to an Internet host on the X.25 side while fronting
for another Internet host on the terminal side, said host speaking serially.
Before you laugh me off the block, consider what has to change in the call-
request packet and how to encode the IPgram on the terminal side. You are
allowed to change the firmware in minor ways. No, it is not a TAC, since
it does not speak TCP. It is a dial-up IP host interface for personal
computers, but where the interface can speak ugly X.28 in dinosaur mode
as well. I might even buy one or two.

Dave