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- Newsgroups: comp.protocols.tcp-ip.ibmpc
- Path: sparky!uunet!noc.near.net!nic.umass.edu!news.amherst.edu!amherst.edu!jwmanly
- From: jwmanly@amherst.edu
- Subject: Problems with BOOTP and NSCA Telnet for DOS
- Message-ID: <1993Jan25.124603.1@amherst.edu>
- Lines: 72
- Sender: news@unix.amherst.edu (No News is Good News)
- Nntp-Posting-Host: amh.amherst.edu
- Organization: Amherst College, Amherst Mass.
- Date: Mon, 25 Jan 1993 16:46:03 GMT
-
- Hi there. We are having a problem using BOOTP under NSCA Telnet 2.3.05.
- The difficulty is that PCs who receive their IP addresses via BOOTP (as
- opposed to via RARP), cannot seem to connect to sites with IP addresses
- beyond our local 148.85.*.* network.
-
- Background:
-
- We have been using NSCA Telnet around here for quite a while to enable our
- PC's to reach both sites on-campus and elsewhere, and it has been working
- well.
-
- Recently, however, we have become interested in using the dynamic IP
- configuration capabilities of Telnet so that we might be able to have a
- single identical CONFIG.TEL file for all the PCs we use (they all have the
- same kind of ethernet card in them).
-
- We first tried using the RARP (myip=RARP in the CONFIG.TEL file) mechanism,
- and that worked just fine -- the machines got their own IP addresses just
- fine, and could still reach sites both local and remote.
-
- However, for various reasons we would prefer to use the BOOTP mechanism to
- tell the PCs what their own IP addresses are. When we do this
- (myip=BOOTP), the PCs find their own addresses correctly, and can still
- reach local sites (sites on our network, 148.85.*.*) just fine. BUT, they
- can't seem to reach sites outside our network through our gateway, even
- though we have not modified the gateway address in the CONFIG.TEL file.
-
- The error we get (from the messages screen) is
-
- ---------------------------------------------------------------------------
- NCSA Telnet 2.3.05 for the PC
-
- Tektronix initialized
- My Ethernet address: 2:60:8c:8e:7a:5e
- My IP address: 148.85.8.11
-
- Host machine not in configuration file
-
- Querying the DOMAIN name server
-
- DOMAIN lookup OK for: nic.near.net
- Trying to open TCP connection to: nic.near.net
-
- Domain Port is:23
-
- Can't open connection, timed out
- ---------------------------------------------------------------------------
-
- Note that except for the last line, this is exactly the same screen that we
- get when trying to do dynamic IP via RARP. Note also that the same failure
- occurs if we try to TELNET via IP number -- instead of via name -- to some
- place outside our own local 148.85.*.* network.
-
- At first, this simply looks like TELNET has somehow gotten confused about
- where it's gateway is, however a particularly confusing thing about the
- error we get is that the "timed out" message is almost immediate. If we
- remove the gateway address from the CONFIG.TEL file, we get the same error
- at the same speed. HOWEVER, if we use dynamic IP via RARP, and remove the
- gateway specification from the CONFIG.TEL file, then the timeout takes
- quite a while and the error message is the more meaningful "gateway not
- responding", rather than "timed out". So it appears that something more
- than just "BOOTP messes up TELNET's gateway address" is going on.
-
- Any ideas? Is anyone else successfully using BOOTP to dynamically
- configure the IP addresses of their PC's AND using those PCs to reach sites
- beyond their local network? Is there a more recent version of NCSA Telnet
- which might have fixed this problem? BTW, we are running DOS 5.0.
-
- Thanks for any light anyone can shed on this matter.
-
- - John W. Manly <JWMANLY@AMHERST.EDU> (System Manager -- Amherst College)
-
-