[svlug] NAT !~ DHCP, comparing NAT to Masquerading to Firewalls -- Re: Routing Software

Ray Olszewski ray at comarre.com
Wed May 10 15:23:24 PDT 2000


At 02:22 PM 5/10/00 -0700, J C Lawrence wrote [in part]:

>This is a common misunderstanding.  NAT is Network Address
>Translation.  It can be:
>
>  N <=> N'       N` is the same size as N
>  M <=> M        M is smaller than M
>  N <=> 1        A special case of N <=> M often call IP Masq.
>
>Linux supports the full NAT definition, and can do all three of the
>above forms.  The usually used IP Masq variant, is just that, a
>variant whose popularity is due to the fact that most people have
>only a single routable IP address, and thus don't have a block to do 
>more interesting mapping forms.

I haven't seen how to do anything other than your case 3 using the common
Linux tools (ipfwadm/ipchains and ipmasqadm). What am I missing? Can you at
least get me started in the right direction?

------------------------------------"Never tell me the odds!"---
Ray Olszewski                                        -- Han Solo
Palo Alto, CA           	 	         ray at comarre.com        
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