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From: tom@wcc.oz (Tom Evans)
Newsgroups: comp.sys.mac.comm,comp.protocols.appletalk
Subject: Re: Using NCSA Telnet with Apple Internet Router
Keywords: Internet Router, LocalTalk, Ethernet, TELNET
Message-ID: <1082@wcc.oz>
Date: 8 Oct 90 08:39:08 GMT
References: <1990Oct2.050129.20610@monu6.cc.monash.edu.au>
Organization: Webster Computer, Melbourne, Australia
Lines: 29

In article <1990Oct2.050129.20610@monu6.cc.monash.edu.au>, sci213v@monu6.cc.monash.edu.au (mr  p    freeman) writes:
> 
> I am seeking advice as to whether it is possible for NCSA Telnet to operate
> in the following situation.

Summary - [Macs]<--LocalTalk-->[Mac, Apple Internet Router]<-Ethernet-->Unix

In a word, no. When running on a Mac directly connected to Ethernet,
NCSA Telnet can directly send the TCP/IP/Ethernet packet straight onto
the wire. When the Mac is on LocalTalk, the TCP/IP packet is put into
the data field of a DDP packet and sent to socket 72 on anything that
answers an NBP LookUp for "a.b.c.d:IPADDRESS", where "a.b.c.d" is the
IP address of the machine you're trying to talk to.

The Apple Internet Router doesn't handle this form of encapsulation.

However, you have a MultiGate there, and if you change the
configuration to allow allocation of IP addresses out the EtherTalk
interface (which is where the packets from the Internet Router are
coming from), it will do the encap/decap/IPGATEWAY stuff for you.

Phone me for configuration details (MultiGate and NCSA Telnet tricks).

BTW the FastPath can do the same trick if Option 7 is set.

========================
Tom Evans  tom@wcc.oz.au  
Webster Computer Corp P/L, 1270 Ferntree Gully Rd Scoresby, Melbourne 3179
Victoria, Australia 61-3-764-1100  FAX ...764-1179