> Date: Mon, 22 May 2000 00:24:22 -0500
> From: "Samuel W. Heywood" <[EMAIL PROTECTED]>
> Subject: Re: Problem with starting EPPPD
> On Mon, 22 May 2000 03:33:19 -0400 (EDT), Thomas Mueller wrote:
>>> Real BOOTP is run on the server. To see if your server is using
>>> it, use PPPD and tcpinfo. In most cases, it will fail.
>> I suppose most ISPs would be stumped if asked whether they had real BOOTP.
> Hey guys:
> Very interesting info here. Could someone please expand on this point
> and please post an example of how to do this? What is tcpinfo?
> Also, please explain what is meant by "real BOOTP", as opposed to psuedo
> BOOTP or simulated BOOTP, or whatever other "non-real" kinds as may
> exist. Please excuse me if my questions may seem ignorant or stupid.
> I confess that I am very lacking in knowledge as to how BOOTP is supposed
> to work. The only thing I think I know about BOOTP is that it is one of
> several kinds of various processes by which an IP number may be
> dynamically assigned.
> Sam Heywood
Well...
Bootp is a protocol, commonly used in lan or tcp/ip server (and very
rare modem connections) that looks for sone data in your pc (usually
ethernet address in case of tcp/ip or lan connections) or some id-file
(in case of modem connections) and with this the BOOTP server can reply
with your IP address, gateway, pc's name, netmask, and dns server for
programs that request it (like arachne)...
Obviosly... there must be an Bootp server in the DNS server in order to
work with it... but also there are 'virtual bootp' servers which is
basically of two types:
#1: Intermediate pc's: This means that an pc (that is not a server) have
installed an program that emulates a real bootp server and replies with
data in the moment that is required...
#2: Bootp "hack": which means that in your pc before the loading of
ms-dos, a program (such as netboot loader), loads a "virtual server"
wich detects any tcp/ip operation and searches for a bootp request, and
replies inmediately with Ip's , Dns, gateways, etc... (commonly found in
universities pc's) (this method involves the uploading of a program
BEFORE ms-dos with TAKES some memory WITHOUT the knowledge of many
routines of MS-dos and this WILL prevent your computer for running many
programs that requires use of High Memory Adresses with the usual method
(allocate(x) in C for example) for example 16-bit version of djpeg, some
types of ramdisks, in some pc's win3.1 will never pop up, etc.
Note that the use of BOOTP involves the fact that you're using a
conection with fixed ip and dns server, and is used basically to give a
"facility" (i dont know how i can say this in english sorry :-) in case
that the server have to change dns or sone other types of
configuration... including your ip in case of extremes changes....
Disvantages about using bootp?? almost none, exept in the case that the
bootp server is down....
hope this can be informational.... :-)
J.
[EMAIL PROTECTED]
-- Arachne V1.61, NON-COMMERCIAL copy, http://arachne.cz/
