Date: 05 Jun 2008 01:33:05 +0200 From: "Arno J. Klaassen" <arno@heho.snv.jussieu.fr> To: Petar Bogdanovic <petar@smokva.net> Cc: net@freebsd.org Subject: Re: IP-forwarding (help) Message-ID: <wplk1kydvy.fsf@heho.snv.jussieu.fr> In-Reply-To: <20080604221738.GA6776@pintail.smokva.net> References: <wpiqwouczq.fsf@heho.snv.jussieu.fr> <20080604221738.GA6776@pintail.smokva.net>
next in thread | previous in thread | raw e-mail | index | archive | help
Petar Bogdanovic <petar@smokva.net> writes: > On Wed, Jun 04, 2008 at 11:06:01PM +0200, Arno J. Klaassen wrote: > > > > Hello, > > > > this is probably a FAQ and/or I'm to tired, but I'd be pleased > > if anyone can tell me what I do wrong : > > > > I have a box with two interfaces, one connected to my lan > > (172.16. ), one to a test-box (192.168.1.1) : > > > > em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > > options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM> > > ether xxx > > inet 172.16.1.240 netmask 0xffffff00 broadcast 172.16.1.255 > > media: Ethernet autoselect (1000baseTX <full-duplex>) > > status: active > > > > em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 > > options=9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM> > > ether xxx > > inet 192.168.1.254 netmask 0xffffff00 broadcast 192.168.1.255 > > media: Ethernet autoselect (1000baseTX <full-duplex>) > > status: active > > > > > > I enable ip.forwarding : > > > > # sysctl net.inet.ip.forwarding > > net.inet.ip.forwarding: 1 > > > > > > And this is my routing table : > > > > Internet: > > Destination Gateway Flags Refs Use Netif Expire > > default 172.16.1.254 UGS 0 20 em0 > > 127.0.0.1 127.0.0.1 UH 0 0 lo0 > > 172.16.1.0/24 link#3 UC 0 0 em0 > > 172.16.1.6 xxxxxxxxxxxxxxxxx UHLW 1 87 em0 1194 > > 172.16.1.230 xxxxxxxxxxxxxxxxx UHLW 1 286 em0 572 > > 172.16.1.240 xxxxxxxxxxxxxxxxx UHLW 1 0 lo0 > > 172.16.1.254 xxxxxxxxxxxxxxxxx UHLW 2 0 em0 487 > > 192.168.1.0/24 link#4 UC 0 0 em1 > > 192.168.1.1 xxxxxxxxxxxxxxxxx UHLW 1 2 em1 616 > > 192.168.1.254 xxxxxxxxxxxxxxxxx UHLW 1 0 lo0 > > > > For this I added to rc.conf : > > > > static_routes="test lan" > > route_test="-net 192.168.1.0/24 192.168.1.254" > > route_lan="-net 172.16.1.0/24 172.16.1.240" > > I'm pretty sure that you don't need these three lines. Turning > net.inet.ip.forwarding on should be enough. That's what I thought? Without the above lines it doesn't work either. And ip.forwarding "works" in the sense trafic goes from 192.168.1.254 forward to 172.16.1.240 over lo0, but then taking "link#3" to go to 172.16.1.0/24 fails. I feel this is /me still not fully understand routing tables. NB, this is on 7-stable-amd64 Arno
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?wplk1kydvy.fsf>