[SOLVED] Problem to setup RSH

jauch · 11-17-2009, 06:03 PM

Hi!

I'm very lost with the rsh.

I need the rsh to use PVM.
But until now, the best that I get was make rsh work on the same computer.

My network is as follow:

A modem-router connected to internet.
A wireless router working like a "hub" connected to modem.
One Desktop and two notebooks connected via "wireless" to the wireless "router/hub"
The modem give the IP's to my machines (DHCP)

I'm trying to put rsh to work, but without success until now.

From notebook_1 to desktop, I get a "desktop: Unknown host" when I try to do this command: rsh desktop ls
If I try this command with the IP instead, I get a "connection timed out"...

I seted the hosts.equiv and the .rhosts file like I found here and on the net, but without success.

Until now, only from one machine (notebook_1), that I put a line with the word rsh on the securetty file, I can use rsh using "rsh localhost ls" or "rsh notebook_1 ls". Both forms work, even if "localhost" and "notebook_1" are not seted on the hosts.equiv file, since each form is on the .rhosts file

I see that on the "etc/hosts" file, on both machine, the "name" of the machine is seted to 127.0.0.2... (maybe this is the problem?)

Anyone can help me?

Thanks!

kbp · 11-17-2009, 08:00 PM

You need to ensure you have network connectivity and name resolution first. If you're not running a local name server (dns) you will need to add entries in /etc/hosts on each machine for every other machine

eg.
/etc/hosts on pc1

Code:

10.0.0.1  router
10.0.0.2  pc1
10.0.0.3  pc2
10.0.0.4  pc3

.. you get the idea

Once this is complete, try testing connectivity from each machine to every other machine -

eg. From pc1:

Code:

ping router
ping pc2
ping pc3

cheers

jauch · 11-18-2009, 06:36 PM

Hi kbp!

First, Thanks

I'll do a test right away!

But a litle doubt rised...

Because the IP's are dynamically assigned by the modem, I never know what is the IP before connect to the network.

It's possible to add or change the entry on the hosts file AFTER the pc is connected without the need to "restart" it to this take effect?

And this let to another doubt.

I can "ping" any machine on my network using the IP's...

It's "absolutly" necessary to have entries on the hosts file to use rsh????

Thanks again!

kbp · 11-18-2009, 11:25 PM

Pretty sure you need name resolution so maybe you'll have to switch the pc's to static ip addressing, either that or set up dhcp/dynamic update dns

Have you tried BCCD ? ... might give you less headaches
http://bccd.net/

cheers

jauch · 11-19-2009, 03:47 PM

Hello again Kbp

I will let the BCCD option in "stand by" for now (but is really interesting what I saw on the home page).
I think that is useful to learn how to do things like make my network work as I need (even if this is not so easy)

I'm trying to do thinks without have to make IP's static. This is because I'm trying to make the PVM work with minimal need to make changes on any network.

Well, after many tests, I get to make rsh work (and PVM too), using the IP. After set all the files that were need (like rhosts), the problem that prevented rsh to comunicate was the firewall, that was up and blocking anything. For the test I disabled the firewall on both machines (do not know if the firewall it's needed with my network, because the firewall of the modem and of the router), and get rsh, and after, the PVM to work (need to set the environment variables like PVM_ROOT yet).

Thanks for all and for the tip of BCCD that I will test on the near future.

I'll see the option of make DHCP update DNS that you said, but think that if this involve setting a DNS server or have a DHCP server other than that of the "modem" (or both things), maybe isn't a "good" choice to me for now.

Anyway, thanks again!!!