From: Pablo Neira Ayuso <pablo@netfilter.org>
To: Stanislav Fomichev <stfomichev@yandex-team.ru>
Cc: netfilter-devel@vger.kernel.org, kaber@trash.net, fw@strlen.de
Subject: Re: [PATCH v2] netfilter: skip checksum verification for outgoing rejected ipv6 packets
Date: Wed, 23 Oct 2013 11:22:08 +0200 [thread overview]
Message-ID: <20131023092208.GA4938@localhost> (raw)
In-Reply-To: <20131022124323.GB3255@stfomichev-desktop>
On Tue, Oct 22, 2013 at 04:43:23PM +0400, Stanislav Fomichev wrote:
> Don't verify checksum for outgoing packets because checksum calculation
> may be done by the device.
>
> Without this patch:
> $ ip6tables -I OUTPUT -p tcp --dport 80 -j REJECT --reject-with tcp-reset
> $ time telnet ipv6.google.com 80
> Trying 2a00:1450:4010:c03::67...
> telnet: Unable to connect to remote host: Connection timed out
>
> real 0m7.201s
> user 0m0.000s
> sys 0m0.000s
>
> With the patch applied:
> $ ip6tables -I OUTPUT -p tcp --dport 80 -j REJECT --reject-with tcp-reset
> $ time telnet ipv6.google.com 80
> Trying 2a00:1450:4010:c03::67...
> telnet: Unable to connect to remote host: Connection refused
>
> real 0m0.085s
> user 0m0.000s
> sys 0m0.000s
Applied to nf-next, thanks!
prev parent reply other threads:[~2013-10-23 9:22 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-22 8:36 [PATCH] netfilter: skip checksum verification for outgoing rejected ipv6 packets Stanislav Fomichev
2013-10-22 10:55 ` Florian Westphal
2013-10-22 12:40 ` Stanislav Fomichev
2013-10-22 12:43 ` [PATCH v2] " Stanislav Fomichev
2013-10-23 9:22 ` Pablo Neira Ayuso [this message]
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