Date: Mon, 12 Jan 2004 13:18:53 -0500 From: Barney Wolff <barney@databus.com> To: Andriy Korud <akorud@polynet.lviv.ua> Cc: freebsd-net@freebsd.org Subject: Re: NATD and available ports Message-ID: <20040112181853.GA20984@pit.databus.com> In-Reply-To: <1073922339.4002c1238030d@isp.polynet.lviv.ua> References: <1073922339.4002c1238030d@isp.polynet.lviv.ua>
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On Mon, Jan 12, 2004 at 05:45:39PM +0200, Andriy Korud wrote: > Hi. > I need to run nat box for ~2000 clients with up to 300.000 active connections. > ipnat doesn't handle such load, so I'm going to try natd - but worry that natd > will simply use all available outgoing ports and then crash. > I have 128 public IP's and in ipnat's configuration just map smaller blocks of > private IP's into certain public IP, but have no idea how can I do this using > natd. You can run multiple copies of natd, each one on its own divert socket. ipfw rules can decide which internal machines & which external addresses go to which divert socket. Performance may well be an issue, depending on bandwidth. Perhaps one NAT box per 100 client boxes would not be overkill - is adding 1% to the h/w budget unreasonable? -- Barney Wolff http://www.databus.com/bwresume.pdf I'm available by contract or FT, in the NYC metro area or via the 'Net.
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