netdev - Re: [PATCH 1/2] ipvs: ip_vs_ftp depends on nf_conntrack

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Message-ID: <20120712153937.GB18793@1984>
Date:	Thu, 12 Jul 2012 17:39:37 +0200
From:	Pablo Neira Ayuso <pablo@...filter.org>
To:	Simon Horman <horms@...ge.net.au>
Cc:	lvs-devel@...r.kernel.org, netdev@...r.kernel.org,
	netfilter-devel@...r.kernel.org,
	Wensong Zhang <wensong@...ux-vs.org>,
	Julian Anastasov <ja@....bg>,
	Hans Schillstrom <hans.schillstrom@...csson.com>,
	Jesper Dangaard Brouer <brouer@...hat.com>
Subject: Re: [PATCH 1/2] ipvs: ip_vs_ftp depends on nf_conntrack_ftp helper

On Wed, Jul 11, 2012 at 09:25:26AM +0900, Simon Horman wrote:
> From: Julian Anastasov <ja@....bg>
> 
> 	The FTP application indirectly depends on the
> nf_conntrack_ftp helper for proper NAT support. If the
> module is not loaded, IPVS can resize the packets for the
> command connection, eg. PASV response but the SEQ adjustment
> logic in ipv4_confirm is not called without helper.
> 
> Signed-off-by: Julian Anastasov <ja@....bg>
> Signed-off-by: Simon Horman <horms@...ge.net.au>
> ---
>  net/netfilter/ipvs/Kconfig | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/net/netfilter/ipvs/Kconfig b/net/netfilter/ipvs/Kconfig
> index f987138..8b2cffd 100644
> --- a/net/netfilter/ipvs/Kconfig
> +++ b/net/netfilter/ipvs/Kconfig
> @@ -250,7 +250,8 @@ comment 'IPVS application helper'
>  
>  config	IP_VS_FTP
>    	tristate "FTP protocol helper"
> -        depends on IP_VS_PROTO_TCP && NF_CONNTRACK && NF_NAT
> +	depends on IP_VS_PROTO_TCP && NF_CONNTRACK && NF_NAT && \
> +		NF_CONNTRACK_FTP

If you require FTP NAT support, then this depends on NF_NAT_FTP
instead of NF_CONNTRACK_FTP.
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