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Top Forums Shell Programming and Scripting Problems with "write" and "wall" Post 302719837 by 123_abc on Tuesday 23rd of October 2012 09:06:14 AM
Old 10-23-2012
Problems with "write" and "wall"

Hello,
I am using VirtualBox to simulate a small network with two Linux computers, the host is Mac OS X. My problem is that I can't send "write" and "wall" messages from the host to one of those Linux computers.

Here is what works:
- The virtual Linux computer answers "ping" messages that have been sent from the Mac OS X host.
- Both computers can ping the router.
- The virtual Linux computer can ping internet hosts like 173.194.34.136.

Here is what doesn't work:
- I can't send "write" and "wall" messages from the host to the Linux guest computer and vice versa.
- The wall commands are dispatched, but not received.
- The write command doesn't work as expected, because I'm a receiving a
" user1 is not logged in on pts/2" although user1 is logged in
in pts/2 (the Linux computer).


Here are my Linux cable connection settings:
IP-address: 192.168.0.102
Netmask: 255.255.255.0
Router/Gateway-IP: 192.168.0.1
DNS-Server: 192.168.0.1

Here are my network settings in VirtualBox for this Linux installation:
- Bridged networking
- PCnet-FAST III
- Promiscuous mode: for all VMS and host

What might be going wrong here? Smilie
 

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VDE_L3(1)						      General Commands Manual							 VDE_L3(1)

NAME
vde_l3 - Virtual Distributed Ethernet 'Layer 3' Switch. SYNOPSIS
vde_l3 -v vde_plug:ipaddress/netmask [-v...] [-r target_network/netmask:gateway] [-G default_gw] [-M mgmt_socket] DESCRIPTION
A vde_l3 connects to one or more vde_switches, performing ip forwarding among its virtual interfaces. A new interface is created at startup for each -v option given at command line. Static routes to target networks can be defined using the -r option. vde_l3 -v /var/run/s1.ctl:192.168.0.1/24 connects to the vde sock at /var/run/s1.ctl with its virtual interface ve0, having the address 192.168.0.1 and netmask 255.255.255.0. vde_l3 -v /var/run/s1.ctl:192.168.0.1/24 -v /var/run/s2.ctl:10.0.0.254/255.255.0.0 connects to the two vde socks, with its virtual interfaces ve0 and ve1, having addressess 192.168.1.0 and 10.0.0.254 respectively. Hosts in each network can specify the vde_l3 as their gateway to reach the other one. OPTIONS
-v vde_plug:ipaddress/netmask Creates a virtual network interfaces on the vde_l3 box, with address ipaddress and netmask netmask. Please note that the netmask can be specified either in the 'classic' A.B.C.D mode, or just by giving the number of leading bits (f.e., /17 for 255.255.128.0). One can define as many interfaces as she wants. -r target_network/netmask:gateway Specify a static route through gateway to reach hosts in target_network with netmask netmask. One can define as many routes as she wants. -G default_gw Specify a default gateway, to be used whenever no static route is defined for a target host. -M mgmt_socket the unix socket where the parameters (interfaces addresses, routes, etc.) can be checked and changed runtime. unixterm(1) can be used as a remote terminal for wirefilter. NOTICE
Virtual Distributed Ethernet is not related in any way with www.vde.com ("Verband der Elektrotechnik, Elektronik und Informationstechnik" i.e. the German "Association for Electrical, Electronic & Information Technologies"). SEE ALSO
vde_switch(1), vdeq(1), unixterm(1), vde_cryptcab(1), wirefilter(1). AUTHORS
VDE_L3 is a tool by Daniele Lacamera <root@danielinux.net> VDE is a project by Renzo Davoli <renzo@cs.unibo.it> Virtual Distributed Ethernet May 7, 2007 VDE_L3(1)
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