From: Julio Sanchez Fernandez <j_sanchez@stl.es>
To: linux-kernel@vger.kernel.org
Subject: Re: Transparent proxies and binding to foreign addresses
Date: 27 Jul 2001 09:16:58 +0200 [thread overview]
Message-ID: <m2hevyaljp.fsf@j-sanchez-p.stl.es> (raw)
In-Reply-To: <m2lmlcakrq.fsf@j-sanchez-p.stl.es> <m2lmlcakrq.fsf@j-sanchez-p.stl.es> <200107270215.EAA1376016@mail.takas.lt>
In-Reply-To: Nerijus Baliunas's message of "Fri, 27 Jul 2001 04:15:32 +0200 (EET)"
Nerijus Baliunas <nerijus@users.sourceforge.net> writes:
> On 25 Jul 2001 21:09:13 +0200 Julio Sanchez Fernandez <j_sanchez@stl.es> wrote:
>
> JSF> This mechanism has worked since I originally wrote my kludge up to
> JSF> 2.2.x but, from what I can gather, it does not work anymore in 2.4.x.
>
> Hello,
>
> I don't know if it is useful for you, but http://www.mcknight.de/jftpgw
> supports transparent proxy for Linux 2.4.x kernel.
Only impersonating the server. What does not work is impersonating
the client and that cannot be fixed from user space.
> BTW, do you know of any port forwarder which works with 2.4 kernel in
> transparent mode? I tried mmtcpfwd and portfwd, but both do not work.
Anyone that used TCP and worked before should be easy to adapt by just
finding where it got the destination address with getsockname and
using the getsockopt with SOL_ORIGINAL_DST thing. Apparently, UDP is
out as well, though I don't care about that currently.
Add to your list more forwarders like transproxy and those (plug-gw in
particular) in the TIS (NAI) FWTK with the transparency patches
described at http://www.fwtk.org
While none of them has been adapted to 2.4, they should be easy as I
said above.
And as long as you don't care what origin address the server sees,
that's alright. But all connections now seem to come from the proxy.
And that does not let you do things like differentiated services,
access control or audit. Even user support becomes a mess.
Julio
next prev parent reply other threads:[~2001-07-27 7:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-07-25 19:09 Transparent proxies and binding to foreign addresses Julio Sanchez Fernandez
2001-07-27 2:15 ` Nerijus Baliunas
2001-07-26 19:41 ` Rob Landley
2001-07-27 7:16 ` Julio Sanchez Fernandez [this message]
2001-07-31 18:13 ` Nerijus Baliunas
[not found] ` <200107311820.UAA1709621@mail.takas.lt>
2001-08-01 6:54 ` Julio Sánchez Fernández
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