RE: [uml-user] Networking Questions

[Peter B. <pe...@ra...>]

To answer my own question...

Instead of the startup being:
linux umid=test root=/dev/ubd0 ubd0=~peter/redhat80/rootfs
ubd7=~peter/redhat80/swapfs eth0=tuntap,,,192.168.0.4

I should have used:
linux umid=test root=/dev/ubd0 ubd0=~peter/redhat80/rootfs
ubd7=~peter/redhat80/swapfs eth0=tuntap,,,192.168.0.5

And I then end up with something like this:

router 192.168.0.1
|
uml host eth0 192.168.0.3
|
uml host tap0 192.168.0.5
|
uml process eth0 192.168.4

The uml host can ping the uml process (192.168.4).  As can other machines
hooked up to the router.
-----Original Message-----
From: use...@li...
[mailto:use...@li...]On Behalf Of
Peter Bryant
Sent: Wednesday, January 29, 2003 10:12 PM
To: use...@li...
Subject: [uml-user] Networking Questions


Hi all.  This is my first post here.

A couple of days ago I didn't have a linux compile under my belt.  Now I've
managed to apply skas patches to host kernels; build UML kernels; create
root file systems; and overcome xterm/respawning too fast on startup.

Now, I'm working on getting the network going.

At the moment the UML host is 192.168.0.3 on a private 192.168.0.* network
connected to the Internet via the router on 192.168.0.1.

I'd like to create a UML process with an IP of 192.168.0.4.  The goal would
be to have that process running httpd and mysql daemons accessible by other
hosts on the 192.168.0.* network - including my Windows laptop ;)

I've tried eth0=tuntap,,,192.168.0.4, but when I sshd to that address from a
remote host I ended up logging into the UML host (vs. the UML process
itself).

I've also tried, to no avail, the bridging method suggested here.
http://user-mode-linux.sourceforge.net/networking.html That only succeeded
in making my UML host inaccessible to the network.  bummer.  I'm sure I was
doing something wrong.

Can anyone suggest the steps/commands I'd need to get my UML process up and
running on 192.168.0.4?

FWIW here is my ifconfig on the UML host:
[root@localhost uml]# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:80:AD:98:92:74
          inet addr:192.168.0.3  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::280:adff:fe98:9274/10 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:380 errors:0 dropped:0 overruns:0 frame:0
          TX packets:173 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:33513 (32.7 Kb)  TX bytes:14772 (14.4 Kb)
          Interrupt:3 Base address:0x1420

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:12 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:944 (944.0 b)  TX bytes:944 (944.0 b)

My uml host is 2.4.20 with the skas patch 3 applied.

My uml process startup is currently something like:
linux umid=test root=/dev/ubd0 ubd0=~peter/redhat80/rootfs
ubd7=~peter/redhat80/swapfs eth0=tuntap,,,192.168.0.4

My uml kernel is stock 2.4.19 + uml-patch-2.4.19-48.bz2

Any advice appreciated.

BTW: (in case it influences the advice) my ultimate goal is to set up a
dedicated server on the Internet and assign each UML processes with one of
the public internet IPs assigned to the UML host.



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