RE: [FW1] Netmasks on different NIC's

[Carric Dooley <carric@com2usa.com>]

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You are using VLSM, but that is fine.  It looks good to me.  =)


Carric Dooley CNE
COM2:Interactive Media
http://www.com2usa.com

"In theory, there is no difference between theory 
and practice. But, in practice, there is. " 
			- Jan L.A. van de Snepscheut 

On Tue, 12 Oct 1999, [windows-1252] Bjørnar B. Larsen wrote:

> Hello everybody! It's all set up and seems to work fine now, and I'd like to
> thank you all, and in case you're interested, tell you what became of my
> firewall.
> 
> Summary:
>  - All my subnets were off by one (my bad!)
>  - I've subnetted a 16 address range instead 
>    of a 32 address range on NIC5. The net 
>    address is divisible by 16
>  - I'm using the class B range 172.30.xxx.xxx 
>    mask 255.255.0.0 on NIC6
>  - I put in an extra NIC7 for future use. 
> 
> The BGP/VLSM/supernets/CIDR discussion went right over my head... Am I using
> this with my current configuration?
> 
> NIC1: xxx.xxx.xxx.32-63 mask 255.255.255.224 (32 addresses)
> NIC2: xxx.xxx.xxx.64-95 mask 255.255.255.224 (32 addresses)
> NIC3: xxx.xxx.xxx.96-103 mask 255.255.255.248 (8 addresses)
> NIC4: xxx.xxx.xxx.104-111 mask 255.255.255.248 (8 addresses)
> NIC5: xxx.xxx.xxx.112-127 mask 255.255.255.224 (16 addresses)
> NIC6: 172.30.xxx.xxx mask 255.255.0.0 (B range for local net)
> NIC7: xxx.xxx.xxx.128-255 mask 255.255.255.192 (64 addresses)
> 
> 
> Thank you very very much.
> 
> 
> :) Bjørnar
> 
> I wrote:
> > 
> > I've got FW-1 ver4 sp3 running on NT4 SP4.
> > 
> > Forgive me if I'm out where the buses don't run:
> > 
> > One of our vendors told me you couldn't play with the netmasks on the
> > Network Interface Cards as you wanted. We own a C-range, and 
> > I'm interested
> > in having the following setup:
> > NIC1: xxx.xxx.xxx.33-64 mask 255.255.255.224 (32 addresses)
> > NIC2: xxx.xxx.xxx.65-96 mask 255.255.255.224 (32 addresses)
> > NIC3: xxx.xxx.xxx.97-104 mask 255.255.255.248 (8 addresses)
> > NIC4: xxx.xxx.xxx.105-112 mask 255.255.255.248 (8 addresses)
> > NIC5: xxx.xxx.xxx.113-144 mask 255.255.255.224 (32 addresses)
> > NIC6: 192.168.xxx.xxx mask 255.255.0.0 (B range for local net)
> > 
> > Does this look all right to you, or do I have to group these 
> > address ranges
> > differently?
> > 
> > 
> > Thanks for your input,
> > 
> > 
> > :) Bjørnar
> > 
> 



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