Baslinux mailing list

[sindi keesan <keesan AT sdf.lonestar.org>]

On Tue, 19 Oct 2004, sindi keesan wrote:

> > > Well, now I can telnet or do send/receive between two
> > > computers hooked up with ethernet cable, both in linux,
> > > but not over serial cable.
> >
> > /root/netsetup has a template for networking via serial cable.
> >
> > Cheers,
> > Steven
>
> I tried that already (got that info from a web site earlier)
> Just tried it again BL3 to BL2.  Won't telnet or even ping.
>
> pppd /dev/tthS0 115200 192.168.1.1:192.168.1.2 local crtscts
> registered device ppp0
> reversed the numbers on the other computer.
>
> Ping 192.168.1.1 (sends to itself in 0.0 ms)
> ping 192.168.1.2 56 data bytes   - nothing happens, I hit Ctrl-C
> and 100% packet loss
>
> telnet won't work either (with in.telnetd -debug on target computer)
>
> The website said I needed to make a file /etc/ppp/options with things like 
> local and crtscts in it.  I will try that next.
>
> Did not help.  On BL3 it just does nothing visible except tell me 56 data 
> bytes, on BL2 ping tells me network is unreachable.

I have been reading various HOWTOs and web pages.  THere is also slip, 
cslip, dip and slattach and wvdial and linuxconf to set up ppp but I found 
one suggestion to use ifconfig.

WHen I run ppp it tells me registered device ppp0.  So on the analogy of 
an ethernet network I typed:
ifconfig ppp0 192.168.1.1 192.168.1.2 (and reversed the numbers
on the other computer).

Now it pings.  But will not connect via telnet (same way I tried it for 
ethernet connection where telnet worked).  Connection refused.  Do I need 
to authenticate?

I added noauth to the pppd line.  Try again.  Connection still refused.
I tried receive/send - connection is still refused.

One site talked about using chat to enter login and password.  I have used 
that in DOS to dial and connect with epppd (DOSppp).  I might try this 
next.

Is there some way to set this up so as not to need login and password?
With ethernet I did not need either to send files.  With plip I sometimes 
had this same problem if things were not set up right (using a script 
without pauses, for instance).

I was reading about putting the IP address of the incoming computer into
pap-secrets so that authentication would not be required but that did not 
seem to work.  * * "" 192.168.1.2

Can I telnet over a plip connection?  At least send/receive already work.
It would be faster but I would need to unplug the printer and I already 
have a second serial port free.  Serial transfer is about 10K/sec, 
ethernet 1-10MB/sec and parallel was in between (1/40 of ethernet = 250K, 
8x serial = 80K?)  Ethernet is fine between desktop computers with linux 
but gets more complicated with DOS, and laptops don't have ethernet 
connections (mine don't anyway).  I presume if kermit works over serial 
and ethernet it will also telnet/transfer over parallel connection.  As 
should zmodem?

I just tried BL3 kermit for dumb terminal connection to BL2 (first 
has to kill pppd which was using that serial port).

The first time I tried to connect I got a scrambled screen with
Password spelled with four upper ASCII characters.  (Kermit entered my 
login wrong from the .kermrc file to start with).

I exited the kermit connection and tried again and things were okay.

I then tried to run X from the dumb terminal and it put X on the OTHER 
computer where I had to use the other keyboard to exit it.

Same thing for links2 graphical (svgalib).
And for seejpeg (also svgalib).

With CLI programs I can stay on the kermit end, using the original 
keyboard and monitor.  Even using color VGA (text mode).

Probably this has something to do with video memory.

I am using a TTL monitor at the same time and when I am NOT in dumb 
terminal mode I cannot use both TTL and graphical VGA - if I switch 
between terminals I lose one or the other, but if both are text mode they 
both continue to display.  The graphical memory (half of it) is used by 
the MDA (TTL) mode.

So a dumb terminal cannot use X on my setup but probably could for people 
who don't also have a TTL monitor plugged in at the same time on the dumb 
terminal computer.

How does one go about using one of these two computers as an X server?
(Without server software just agetty).

Would BL3 in 4MB be able to connect to a computer with more RAM (and 
monitor turned off) and run programs in X?  Or even with 3MB?  I can't 
check this until I put it on a computer with just one (VGA) monitor.
Would a (VGA only) DOS computer with 512K and kermit also work for this?

Still don't know how to telnet over a serial cable.
Steven, did you actually have this working with BL2 or 3?

Sindi