Date: Mon, 19 Jan 1998 12:18:17 -0800 From: "Michael L. VanLoon -- HeadCandy.com" <michaelv@MindBender.serv.net> To: alex@comsys.com Cc: freebsd-isp@FreeBSD.ORG Subject: Re: Network address translation Message-ID: <199801192018.MAA12370@MindBender.serv.net> In-Reply-To: Your message of Mon, 19 Jan 98 12:04:05 -0700. <34C3A3A5.7C3F@comsys.com>
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>We need to setup a classroom at our ISP here in Carbondale.
>We'd like to use 10. addresses for the classroom systems. Any
>pointer to success with some version of network address translation,
>would be helpful.
As someone else said, "man natd", or in NetBSD "man ipnat". Also,
"man ipf" for a more general discussion of ip filters (in NetBSD
anyway).
FYI, I have a 24-bit address space, 198.232.197/24. I have configured
my NetBSD box to translate all packets going out from all hosts with
the upper bit set in my address space (i.e. 198.232.197.128 -
198.232.197.255), so they appear to come from my ISP-connected
address. This is what appears in my ipnat.conf:
map ppp0 198.232.197.128/25 -> 205.153.153.98/32 portmap tcp/udp 1025:65000
map ppp0 198.232.197.128/25 -> 205.153.153.98/32
Note that the code in the ip filter stuff has diverged somewhat
between FreeBSD and NetBSD, so this syntax may not be exactly correct
for the FreeBSD stuff, but it should give you an idea how it's done.
-----------------------------------------------------------------------------
Michael L. VanLoon michaelv@MindBender.serv.net
Contract software development for Windows NT, Windows 95 and Unix.
Windows NT and Unix server development in C++ and C.
--< Free your mind and your machine -- NetBSD free un*x >--
NetBSD working ports: 386+PC, Mac 68k, Amiga, Atari 68k, HP300, Sun3,
Sun4/4c/4m, DEC MIPS, DEC Alpha, PC532, VAX, MVME68k, arm32...
NetBSD ports in progress: PICA, others...
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