Date: Sun, 21 Dec 2003 21:05:19 +0100 From: zk <zk@wspim.edu.pl> To: freebsd-security@freebsd.org Subject: Re: Configuring JAIL to bind on lo0 interface Message-ID: <20031221200519.GD465@hhos.serious.ld> In-Reply-To: <20031220014231.GA23229@blurp.one.pl> References: <20031219162648.GA76539@blurp.one.pl> <20031219170339.48E40D2@ken.ccs.sut.ru> <20031220014231.GA23229@blurp.one.pl>
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On Sat, Dec 20, 2003 at 02:42:31AM +0100, GiZmen wrote: > > As i understood your problem you need addition alias on lo0 interface > > for gateway ip purpose. So you have lo0 interface and lo0_alias0 > > 192.168.1.1 as default gateway for jails. And now you create new jails' > > ip as aliases on lo0 iface. > > > > For example: > > > > no jail, only gateway - lo0_alias0 192.168.1.1/24 > > > > jail1 - lo0_alias1 192.168.1.2/24 - hostname jail1.domain.com > > in this jail set default gateway to 192.168.1.1 > > > > jail2 - lo0_alias2 192.168.1.3/24 - hostname jail2.domain.com > > in this jail set default gateway to 192.168.1.1 also > > > > Your host machine have to be gateway enabled. > > > > Now if you want to switch on internet access from jail1 you only need to > > add nat rule to translate jail1's ip to the host primary ip. > > > > Alesha. > > I dont know how can it work? AFAIK in jail i cant change the default > gateway. > Don't set default gateways in jails. You can use something like this ipfw add <no> divert natd all from any to any via <external_iface> (...) -- rules to allow nated packets to pass packets from jails. To allow traffic from outside to your server on private address you can try: ipfw add <no> fwd <server_addr> <protocol> from any to <external_iface_addr> <port_no> in recv <external_iface> or ipfw divert with another natd process. It's possible to configure lo1, lo2 ... interfaces with diffrent addreses (with pseudo-device loop <no> in kernel config file). I've described FreeBSD 4.x. zk
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