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Corporate VPN service with separate nets for different users/groups

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Special Forums IP Networking Corporate VPN service with separate nets for different users/groups
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Old 11-17-2009
Corporate VPN service with separate nets for different users/groups
Hi

We are going to host some services for customers with separate private networks for each customer. Each customer will need one or more users.

I have to put up a VPN solution, and I would like to use something that will work on "any" platform, easily, without too much installation/configuration. I feel PPTP is a good option since the "agent" is included on most platforms. We have a firewall/router on a Debian Linux server, and I'd like to extend it's services to include the VPN service. It has access to all nets, so it should be easier to get that to work.

My firewall/router has four interfaces, but only three of concern. eth0 is the outside, eth1 is the inside and eth2 is DMZ. I use proxyarp to get traffic from eth0 to eth2, with iptables filtering. eth1 has three internal nets in the 192.168.* series. The new nets I want to use for customers will be separate VLAN's on that interface with 10.20.x.* addresses. The firewall/router will of course have an IP in each of these (typically .1).

The big question is how to set this up? Can pptpd be used? Should this be done on a separate server?
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LEARN ABOUT SUSE

networkmanager

NETWORKMANAGER(8)					      System Manager's Manual						 NETWORKMANAGER(8)

NAME

       NetworkManager - network management daemon

SYNOPSIS

       NetworkManager [--no-daemon]

DESCRIPTION

       The  NetworkManager  daemon  attempts to make  networking configuration and operation as painless and automatic as possible by managing the
       primary network connection and other network interfaces, like Ethernet, WiFi, and Mobile Broadband devices.   NetworkManager  will  connect
       any  network device when a connection for that device becomes available, unless that behavior is disabled.  Information about networking is
       exported via a D-Bus interface to any interested application, providing a rich API with which to inspect and control network  settings  and
       operation.

       NetworkManager will execute scripts in the /etc/NetworkManager/dispatcher.d
	      directory in alphabetical order in response to network events.  Each script should be (a) a regular file, (b) owned by root, (c) not
	      writable by group or other, (d) not set-uid, (e) and executable by the owner.  Each script receives two arguments, the  first  being
	      the interface name of the device just activated, and second an action.

       up     The  interface has been activated.  The environment contains more information about the interface; CONNECTION_UUID contains the UUID
	      of the connection.  Other variables are IP4_ADDRESS_N where N is a number  from  0  to  (#  IPv4	addresses  -  1),  in  the  format
	      "address/prefix gateway".  IP4_NUM_ADDRESSES contains the number addresses the script may expect.  IP4_NAMESERVERS contains a space-
	      separated list of the DNS servers, and IP4_DOMAINS contains a space-separated list of the search domains.   Routes  use  the  format
	      IP4_ROUTE_N  where  N  is a number from 0 to (# IPv4 routes - 1), in the format "address/prefix next-hop metric", and IP4_NUM_ROUTES
	      contains the number of routes to expect.	If the connection used DHCP for address configuration, the received DHCP configuration	is
	      passed in the environment using standard DHCP option names, prefixed with "DHCP4_", like "DHCP4_HOST_NAME=foobar".

       down   The interface has been deactivated.

       vpn-up A VPN connection has been activated.  The environment contains the connection UUID in the variable CONNECTION_UUID.

       vpn-down
	      A VPN connection has been deactivated.

       hostname
	      The system hostname has been updated.  Use gethostname(2) to retrieve it.

OPTIONS

       The following options are supported:

       --no-daemon
	      Do not daemonize.  This is useful for debugging, and directs log output to the controlling terminal in addition to syslog.

DEBUGGING

       The  following environment variables are supported to help debugging.  When used in conjunction with the "--no-daemon" option (thus echoing
       PPP and DHCP helper output to stdout) these can quickly help pinpoint the source of connection issues.

       NM_SERIAL_DEBUG
	      When set to anything, causes NetworkManager to log all serial communication to and from serial  devices  like  mobile  broadband	3G
	      modems.

       NM_PPP_DEBUG
	      When  set  to anything, causes NetworkManager to turn on PPP debugging in pppd, which logs all PPP and PPTP frames and client/server
	      exchanges.

SEE ALSO

       nm-tool(1)

																 NETWORKMANAGER(8)