Newbie question: is net.inet.ip.fastforwarding intended for
ru at freebsd.org
Sat Jan 17 02:16:11 PST 2004
On Sat, Jan 17, 2004 at 12:17:48PM +0800, Xin LI wrote:
> As title. To my imagination (I have taken a sight on the kernel networking
> code), the fastforwarding path is intended for routers only, so if I want
> some functionalities, for example, NAT, the fastforwarding is not useful,
> and my experiment shows that if I enable it, ipfilter's NAT will be broken.
> Am I right?
> Thanks in advance!
Worse. From the inet(4) manpage,
: IPCTL_FASTFORWARDING (ip.fastforwarding) Boolean: enable/disable the use
: of fast IP forwarding code. Defaults to off. When
: fast forwarding is enabled, IP packets are for-
: warded directly to the appropriate network inter-
: face with a minimal validity checking, which
: greatly improves the throughput. On the other
: hand, they bypass the standard procedures, such as
: IP option processing and ipfirewall(4) checking.
: It is not guaranteed that every packet will be
ru at FreeBSD.org
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