Re: [coLinux-devel] RE: coLinux NAT

[Digital I. Inc. <ok...@di...>]

Hello green.

You are the guy talked about slirp on irc?

yes, your invention is good.
but I guess Windows RRAS can do almost same stuff.

                 --- Okajima.


>DNAT is destination NAT an iptables feature
>
>DNAT changes the destination (as apposed to the more common snat which
>changes the source)
>
>a daemon runs on the linux side and listens for connections on port 9999
>
>adressess like 127.0.0.0/8 are cidr addresses the /8 part means the first 8
>bits are significant so in this case it would match everthing from 127.0.0.0
>to 127.255.255.255
>
>a dnat entry redirects all outgoing TCP connections except those to
>127.0.0.0/8 (and during development 10.0.0.0/8 but that will be removed
>later) to 127.0.0.1:9999
>
>this daemon picks them up and works out thier original destination by
>reading /proc/net/tcp
>
>this will communicate with a daemon on the host side. during initial testing
>i will use tcp (yes i know this defeats the main object but it allows me to
>test before more suitable mechanisms are in place) but i am hopeing for some
>kind of generic char device that links to the stdin and stdout of a windows
>side app.
>
>the windows side app will make the conenctions like any other windows app.
>
>i will probabblly make it so that connecting to 192.0.2.0/24 makes a
>connection to 127.0.0.0/24 on the host
>
>i chose the 192.0.2.0 range because it is not allowed on the public internet
>and with it's documented intended use i find it unlikly that it will be used
>on a private network
>
>from rfc 3330
>192.0.2.0/24 - This block is assigned as "TEST-NET" for use in
>   documentation and example code.  It is often used in conjunction with
>   domain names example.com or example.net in vendor and protocol
>   documentation.  Addresses within this block should not appear on the
>   public Internet.
>
>-----Original Message-----
>From: Digital Infra, Inc. [mailto:ok...@di...]
>Sent: 08 April 2004 03:23
>To: peter green
>Cc: col...@li...
>Subject: coLinux NAT
>
>
>
>what is dnat?
>
>... anyway, if you mention about how to share one IP,
>I think using RRAS
>   ([Control Panel]->[Service]->[Routing and Remote Access] on Win2k/XP)
>is one candidate.
>I have not tested it, but I heard that it is generic NAT driver for Win.
>
>            --- Okajima.
>
>
>>i'm working on an alternative approach which shouldn't require any special
>>drivers on the host when finished
>>
>>the basic idea is to use a dnat to direct all outgoing connections to a
>>local daemon
>>
>>this will pick them up as connections (note connections not packets) and
>>will then communicate in some manner with a daemon on the host (i've yet to
>>work out exactly how to do this) this daemon will then use normal winsock
>>calls to connect to the destination.
>>
>>-----Original Message-----
>>From: col...@li...
>>[mailto:col...@li...]On Behalf Of
>>ch...@to...
>>Sent: 08 April 2004 00:44
>>To: Digital Infra, Inc.
>>Cc: ch...@to...; Bart Kerver; Cooperative Linux Development
>>Subject: Re: [coLinux-devel] XML configuration
>>
>>
>>I have not tried it my self but I may give it a try to see what works.
>>I was just basing my responce on my experience with trying to make
>>programs that used other programs compiled with cyg.
>>
>>IMHO vnc would probably be better for coknoppix because of the single file
>>viewer.
>>
>>Another thing I was thinking about is that the colinux-daemon may need a
>>post boot command that you can add to the config file that will run after
>>it is up and ready to accept the connection.
>>
>>Or have you already worked out a way to know when to run X so that it is
>>not coming up before coLinux is ready?
>>
>>Is there a way to use the tap driver as a standalone program or will it
>>have to be installed for the live cd to work. It would be so cool if a gui
>>would just pop up and be ready to go the first time the cd is inserted
>>with no interaction.
>>
>>chris
>>
>>>
>>>
>>> Hello Chris and Kerver.
>>>
>>> thanks for advise.
>>>
>>> I want to confirm one thing -
>>>   in your env, you can run startx.zip without /cygwin/usr/bin/X11R6 ?
>>>   for example, you do
>>>       [Cygwin]$ mv /usr/bin/X11R6 /usr/bin/X11R6.notfound
>>>   then you can run XWin.exe from startx.zip?
>>>
>>> at least, it fails in my env.
>>> Windows does not complain. Just Xwin.exe fails without any message.
>>> and I found that font files in /usr/bin/X11R6/lib/X11/fonts are
>necessary.
>>> and it also requires /tmp.
>>>
>>> To make Cygwin/X installer, I have to fix what is really necessary.
>>>
>>> I hope you try it and send me the result.
>>>
>>>      thanks in advance, Okajima.
>>>
>>>
>>>>
>>>>>
>>>>> and Kerver, I found that your startx.zip needs full Cygwin/X install.
>>>>> if you dont understand, change your c:/cygwin/usr/bin/X11R6 to other
>>>>> name.
>>>>> your zip does not run. you have any idea?
>>>>>
>>>>>                  --- Okajima.
>>>>
>>>>
>>>>A little tip I found is that when adding cygwin directories to the
>>>> windows
>>>>path add them under user variables not under system variables. That way
>>>>you can have an account that does not have access to them for testing
>>>>unless the program finds the file without using PATH
>>>>
>>>>Okajima, does windows not complain that it cannot find a certian file?
>>>>
>>>>chris
>>>>
>>>
>>>
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