(#001) - Dynamically Assigning IP Addresses to Netware Servers
by: Jim Huddle CNE, CNE5, CBS, MCSE, send
as long as I can remember, which isn't all that long since
I've got the memory of a gnat, I've been aggravated because
hasn't been a way to dynamically assign an IP address to a
Netware server. Now I grant you that most of the time you
want a static address on a server, but occasionally you do
need more flexibility.
Netware 5.1 shipped it included a way to do this. They didn't
make much noise about it and I only discovered it about a
week ago. Its a bit clumsy to set up, but once its
configured it works very well.
key is an NLM named DHCPCLNT. Why would you use this? Well
I've got a cable modem at home and I was using a software
gateway on my primary workstation to provide my home network
with access to the Internet. It worked okay, but it also used
a lot of resources and there were some issues with the Netware
client. In addition, whenever I had to reboot the workstation,
my spouse would look over the top of her monitor and give
me a decidedly unpleasant look. The 'Cosmic Muffin' should
protect the man who prevents his spouse from getting The Weather
Channel site 24 hours a day. In the real world though, if
you run Netware, this is a nice way to get Internet access
without buying a cable modem router. You can set up both network
address translation (NAT) and filtering on a base 5.1 box
without installing Border Manager.
what to do. First you'll need to install a second NIC in the
server. Most cable providers only support a few NICs and only
on Windows, so once you do this you're pretty much on your
own. I used an old Relisys NIC I had laying around. Install
the driver and set up the NIC as you would any other one in
Netware. Once thats done open INETCFG, go to Bindings
and assign the NIC an IP address. Do this because you can't
bind IP to a NIC in INETCFG unless you give it an address.
It doesn't matter what you assign it, but it's best to use
one of the private addresses set aside for internal networks.
Why Novell didn't add that ability when they released the
NLM I'll never know. But they didn't, so just live with it.
Press Escape and then Expert TCP/IP Bind Options/Network Address
Translation. Under Status, select Dynamic Only.
from that and select Protocols and TCP/IP. Make sure IP Packet
Forwarding is Enabled and RIP is Disabled. Back out to the
main menu and select View Configuration. From there select
Protocol Bind Commands. Note the name INETCFG has given the
NIC. You'll need the name in the next part.
and exit INETCFG. Either restart the server or enter Reinitialize
system from the console prompt. After that enter CONFIG from
the console prompt and verify that the second NIC is properly
bound with the IP address you gave it.
everything is good at the console prompt, type EDIT AUTOEXEC.NCF.
Since you can't configure DHCPCLNT from within INETCFG, you
have to load it separately once initsys.ncf has run. Find
the line that loads INITSYS.NCF. Under that, type in LOAD
DHCPCLNT NAME=<name from inetcfg bind statement> -inetcfg.
The "- inetcfg" tells the NLM to update inetcfg
with the setting the NLM pulls from the ISP. Putting this
here will load the NLM on every reboot of the server. Escape
and save the file.
at the console prompt type in the same command. Nothing very
exciting happens. Hit Ctrl-Escape and you should see a line
that says "DHCP Client INFO SCREEN". Select the
number to the left. You will be on screen showing the status
of the NIC. If all has gone well you will see the address,
subnet mask and gateway assigned by the cable providers
DHCP server. You'll also see the lease time, when it expires
and the DNS servers provided by the ISP. If you check it again
after the lease expires you'll see a line telling you the
lease was successfully renewed and repeating the information
you need to set some packet filters to keep the bad guys out.
That will have to wait for next time as I'm over my word limit.
to the Editor are welcome and occasionally abused in public.
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