28 Aug
2021
28 Aug
'21
1:13 p.m.
On 8/28/2021 1:15 PM, Bill Gunshannon via cctalk wrote:
I edited
inetd.conf to uncomment telnet.? It helped.
I brought up a Vax Alpha 3000-300 and tried interacting with the
Ultrix-11 simulation:
Starting in Ultrix-11 I could log into the vax via telnet. Ultrix-11 ftp
was able to transfer a short ascii file from the Vax to the Ultrix-11 sim.
Going the other way, Ultrix-11 would reject an ftp request from the vax,
here is the error message -
$ ftp 192.169.0.52
%TCPIP-E-FTP_NETERR, I/O error on network device
-SYSTEM-F-UNREACHABLE, remote node is not currently reachable
$
Ultrix-11 would allow a telnet connection (after the change to
inetd.conf) and I could do an ls, but when I asked for a man page it
hung up.? Nothing after that, had to kill it.
I got the same result whether I was telneting in from the Vax or Linux
computer.? Probably not news to you.? I wonder if real hardware works
just like this....
It was good to find out that you can get things in/out of the Ultrix-11
simulation.
Doug
On 8/28/21 1:03 PM, Douglas Taylor via cctalk wrote:
I don't know what this means.? The kernel creation was automatic, it
seemed to check for enough room.
Yes, I did create a new kernel and copy it to the
correct place and
chmod 644 the new unix file.
Did yo have fun playing with the overlays?? :-) On my Debian system I can install ftpd and
telnetd (they are still in
the Debian package list) which are the unsecure ones, but I don't
know how to configure them or start them.? As in, # systemctl?
restart ftpd
Probably easier to turn them on on Ultrix-11.? Just modify inetd.conf.
Actually, I just looked and ftp is on by default. Telnet is not.
It turns out to not be a hot topic: "How do I make my Liinux system
less secure?",? but for us that noodle around with old computers with
obsolete operating systems it is exactly what we need.? In the past I
remember using Filezilla to go from a Windows7 machine into a Vax
without any problem.
I suspect you will be somewhat disappointed with networking in
Ultrix-11.? Not that there is something wrong with it, just that
the hardware is nothing like you are used to.? In the early days
of networking it was not unusual for systems like the PDP-11 to
crash just because of the traffic passing by on their network
connection.? The advent of switches helped alleviate that but it
is still common to crash a system by pushing data at it from a
modern ftp.? I expect FileZila will do it.? To be honest, I always
preferred Kermit for moving files.? It is possible to keep packet
sizes down and even slow down the transfer rate to give the PDP
time to handle it.
bill