From: Florian Westphal <fw@strlen.de>
To: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Cc: Florian Westphal <fw@strlen.de>,
Pablo Neira Ayuso <pablo@netfilter.org>,
netfilter-devel@vger.kernel.org,
Linux Kernel Network Developers <netdev@vger.kernel.org>
Subject: Re: [PATCH net-next] netfilter: nf_conntrack: introduce conntrack limit per-zone
Date: Wed, 23 Oct 2019 13:07:56 +0200 [thread overview]
Message-ID: <20191023110756.GM25052@breakpoint.cc> (raw)
In-Reply-To: <CAMDZJNXqJk=gDSCRv98EuCyvmCHNarC7Tcu-BuBwo8b+sTOiBQ@mail.gmail.com>
Tonghao Zhang <xiangxia.m.yue@gmail.com> wrote:
> > openvswitch supports per zone limits already, using nf_conncount
> > infrastructure.
> This path limits the UNREPLIED conntrack entries. If we SYN flood one
> zone, the zone will consume all entries in table, which state
> SYN_SENT.
> The openvswitch limits only the +est conntrack.
Why? Can't it be fixed to work properly?
> > iptables -t mangle -A PREROUTING -m conntrack --ctstate NEW -m connlimit \
> > --connlimit-above 1000 --connlimit-mask 0 -j REJECT
This should work for the synflood case, too.
prev parent reply other threads:[~2019-10-23 11:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-17 5:03 [PATCH net-next] netfilter: nf_conntrack: introduce conntrack limit per-zone xiangxia.m.yue
2019-10-23 10:31 ` Florian Westphal
2019-10-23 10:57 ` Tonghao Zhang
2019-10-23 11:07 ` Florian Westphal [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20191023110756.GM25052@breakpoint.cc \
--to=fw@strlen.de \
--cc=netdev@vger.kernel.org \
--cc=netfilter-devel@vger.kernel.org \
--cc=pablo@netfilter.org \
--cc=xiangxia.m.yue@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.