Re: [PATCH] xtables-addons: xt_RAWNAT: skb writable part might not include whole l4 header (ipv4 case).

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On Mon, May 13, 2013 at 01:50:20PM +0400, Dmitry Popov wrote:
> On Wed, 8 May 2013 23:32:16 +0200 (CEST)
> Jan Engelhardt <jengelh@xxxxxxx> wrote:
> 
> > The only way to solve the NAT problem is to do without it.
> > Full NAT is not simple at all, it requires DPI.
> > RAWNAT is just a dumb l3addr replacer and does not help
> > getting multi-connection sessions (such as 959ish FTP) going.
> 
> Well, in means of full nat - yes. I have no statistics of how people use 
> nf_nat/xt_RAWNAT, but in my tasks I have a lot of packets that do
> not need DPI.

Not only DPI. You're also leaking your network topology though ICMP
error messages, as the internal header is not mangled.
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