From: David Ahern <dsahern@gmail.com>
To: Toerless Eckert <tte@cs.fau.de>, Sowmini Varadhan <sowmini05@gmail.com>
Cc: Bill Fink <billfink@mindspring.com>,
Cong Wang <cwang@twopensource.com>,
netdev <netdev@vger.kernel.org>
Subject: Re: vnet problem (bug? feature?)
Date: Mon, 16 Feb 2015 08:30:12 -0700 [thread overview]
Message-ID: <54E20D04.8050409@gmail.com> (raw)
In-Reply-To: <20150216101309.GB25792@faui40p.informatik.uni-erlangen.de>
On 2/16/15 3:13 AM, Toerless Eckert wrote:
> I fail to find a good reference explaining why linux would default to
> rp_filtering = 1 (more appropriate for routers) even if forwarding defaults to 0
> (more appropriate for multi-homed hosts).
It's a userspace default. For Fedora/Red Hat based systems see
/etc/sysctl.conf (older releases) and /usr/lib/sysctl.d/50-default.conf
(newer ones).
I recall it defaulting to 1 in the early 2000's so it has been that way
for a long time.
From Documentation/networking/ip-sysctl.txt:
rp_filter - INTEGER
...
Default value is 0. Note that some distributions enable it
in startup scripts.
David
next prev parent reply other threads:[~2015-02-16 15:30 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-13 11:41 vnet problem (bug? feature?) Toerless Eckert
2015-02-13 23:48 ` Cong Wang
2015-02-14 10:15 ` Toerless Eckert
2015-02-14 18:17 ` Bill Fink
2015-02-15 10:12 ` Toerless Eckert
2015-02-15 19:00 ` Toerless Eckert
2015-02-15 21:16 ` Sowmini Varadhan
2015-02-16 10:13 ` Toerless Eckert
2015-02-16 15:30 ` David Ahern [this message]
2015-02-16 19:54 ` David Miller
2015-02-16 21:51 ` Bill Fink
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