Re: Checkpoint & NetBeui

larstr_at_no-spam.colargol.tihlde.org
Date: 01/19/04 

Date: Mon, 19 Jan 2004 21:20:07 +0000 (UTC)

buhockey21 <amward1980@yahoo.com> wrote:
: Specs:

: (2) Windows 2000 PC's (Internal - 192.168.1.100 & 192.168.1.101)
: (1) Linksys Wireless-B Router (Internal Gateway - 192.168.1.1)
: (1) Motorola Surfboard Cable Modem (External - IP provided by ISP)

: We have successfully installed and connected to our external network
: (Microsoft Terminal Server environment) using VPN-1 SecureClient
: Version 4.1 SP-5 3DES.

: However, the problem is internally within the network and we need to
: allow our (2) Windows 2000 PC's to talk with one another. This works
: succesfully with the installation of NetBeui running and Checkpoint
: NOT running. But when Checkpoint is installed and attempting to
: connect to our external network with NetBeui
: running the following error in red is displayed "You are using NetBEUI
: or another non IP network protocol which is not protected"

: How can we allow our Checkpoint connection to our external network to
: take place while at the same time permitting internal LAN browsing to
: take place among our (2) Windows 2000 PC's.

: Any insight would be a great help!

NetBEUI is a non routable protocol. This means that such trafic cannot
go across a routing device (such as the checkpoint firewall). Also, most
firewalls today supports only IP trafic and some do also support other
protocols, but never NetBEUI.

Instead of using NetBEUI you should rather use NBT (NetBIOS over TCP/IP).
This will work across firewall-1 if you setup rules for it. In order to
"browse" the network you need an internal name server to serve this
service on both segments. This means thath you must configure all your
machines to use this. Windows 2000 can use MS DNS or Bind9 for this
task. You can alternatively setup a wins server instead (it would work
as well).

Lars

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