Transparent proxy with IPv6 on Linux [REDIRECT target is gone]

Transparent proxy with IPv6 on Linux [REDIRECT target is gone]

[Brian G]

Hi, on Linux with netfilter: previously I could do "iptables -j 
REDIRECT" to create a IPv4 transparent proxy. However, this is 
unsupported on IPv6.

How can I achieve this? iptables6 removed the REDIRECT target because it 
does not support Network Address Translation in IPv6.

I need the transparent proxy to work with IPv6 under Linux. How are 
people doing this?

- Brian

Re: Transparent proxy with IPv6 on Linux [REDIRECT target is gone]

[Jean-Philippe Menil]

Le 04/04/2011 07:13, Brian G a écrit :
> Hi, on Linux with netfilter: previously I could do "iptables -j 
> REDIRECT" to create a IPv4 transparent proxy. However, this is 
> unsupported on IPv6.
>
> How can I achieve this? iptables6 removed the REDIRECT target because 
> it does not support Network Address Translation in IPv6.
>
> I need the transparent proxy to work with IPv6 under Linux. How are 
> people doing this?
>
> - Brian
> -- 
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Hi,

you need at least, a 2.6.37 kernel with the tproxy module:
CONFIG_NETFILTER_TPROXY=m
CONFIG_NETFILTER_XT_TARGET_TPROXY=m
and the last iptables release:

root@test-jp-2:~# ip6tables -t mangle -nvL
Chain PREROUTING (policy ACCEPT 5584 packets, 416K bytes)
  pkts bytes target     prot opt in     out     source               
destination
    60  4400 DIVERT     tcp      *      *       ::/0                 
::/0                 socket
     0     0 TPROXY     tcp      *      *       ::/0                 
::/0                 tcp dpt:80 TPROXY redirect :::50080 mark 0x1/0x1

Regards.

-- 
Jean-Philippe Menil - Pôle réseau Service IRTS
DSI Université de Nantes
jean-philippe.menil@univ-nantes.fr
Tel : 02.53.48.49.27 - Fax : 02.53.48.49.09

Re: Transparent proxy with IPv6 on Linux [REDIRECT target is gone]

[Jan Engelhardt]

On Monday 2011-04-04 07:13, Brian G wrote:

> Hi, on Linux with netfilter: previously I could do "iptables -j REDIRECT" to
> create a IPv4 transparent proxy. However, this is unsupported on IPv6.
>
> How can I achieve this? iptables6 removed the REDIRECT target because it does
> not support Network Address Translation in IPv6.

(Nothing was removed, it was never there.)