I'm trying to connect to my workplace's network using VPN (PPTP,
specifically). It has been setup, and it works (the other tech who
works with us verified that). I, however, am unable to connect from my
house. I've determined that the reason is that he was using a direct
connection to the internet, where as I'm am trying to connect through
my firewall/router at my house, which happens to be a Slackware 11 box
using IP Masq & iptables. I connect to the internet via dialup, not
that that should matter too much.

I've googled around the internet a few times, and discovered that what
I need is for my router to enable PPTP Passthrough, but I couldn't
find a good reference on how to do that on Slackware/manually. Does
anyone here know of a good way to do this? The machine I'm trying to
connect with from home is a Windows XP box (I plan on putting
Slackware on a partition beside it & dual booting).

Any help with this problem would be greatly appreciated.

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 2007-03-30, mleo2003 <mleo2003@gmail.com> wrote:
> I'm trying to connect to my workplace's network using VPN (PPTP,
> specifically). It has been setup, and it works (the other tech who
> works with us verified that). I, however, am unable to connect from my
> house. I've determined that the reason is that he was using a direct
> connection to the internet, where as I'm am trying to connect through
> my firewall/router at my house, which happens to be a Slackware 11 box
> using IP Masq & iptables. I connect to the internet via dialup, not
> that that should matter too much.

Verify that by connecting your client workstation directly to the
Internet and then attempting to make the connection.

> I've googled around the internet a few times, and discovered that what
> I need is for my router to enable PPTP Passthrough, but I couldn't
> find a good reference on how to do that on Slackware/manually.

I'm amazed at the number of people who think they know everything about
TCP/IP because they've setup a couple of NAT routers for simple LANs. I
have _never_ heard of anyone refer to this as "PPTP Passthrough". That
sounds to me like some term a proprietary firewall vendor has dubbed a
fix to their firewall because it doesn't by default know anything about
GRE.

I'm willing to bet that your problem is because your firewall doesn't
pass GRE (protocol 47) packets. Google for iptables and GRE/pptp and
you should find all the information you need.

- --
It is better to hear the rebuke of the wise,
Than for a man to hear the song of fools.
Ecclesiastes 7:5
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.7 (GNU/Linux)

iD8DBQFGDbYYFRvIvfSNceoRArjSAKChdNaXLJiux0I6zIxm/0KZBEZX3ACgr6LC
TGjAYS+hNRuGnWtK+BvDqok=
=iuvg
-----END PGP SIGNATURE-----

I'm not the one who called it that, I just saw it called that, and it
made sense in my head, so I just used it.

Thanks for the point to look up, I'll see what I can find out using
that info.

On Fri, 30 Mar 2007 14:11:40 -0700, mleo2003 wrote:

> I'm trying to connect to my workplace's network using VPN (PPTP,
> specifically). It has been setup, and it works (the other tech who
> works with us verified that). I, however, am unable to connect from my
> house. I've determined that the reason is that he was using a direct
> connection to the internet, where as I'm am trying to connect through
> my firewall/router at my house, which happens to be a Slackware 11 box
> using IP Masq & iptables. I connect to the internet via dialup, not
> that that should matter too much.
>
> I've googled around the internet a few times, and discovered that what
> I need is for my router to enable PPTP Passthrough, but I couldn't
> find a good reference on how to do that on Slackware/manually. Does
> anyone here know of a good way to do this? The machine I'm trying to
> connect with from home is a Windows XP box (I plan on putting
> Slackware on a partition beside it & dual booting).
>
> Any help with this problem would be greatly appreciated.
>
Caveat: I am not running PPTP.

This project covers PPTP using Linux kernels >= 2.6.15.
http://pptpclient.sourceforge.net/

Background
http://en.wikipedia.org/wiki/Point-t...eling_protocol

Some of the final tweaking to get this working may depend on how you
connect. Do you connect via dialup to an ISP, or are you calling your
office directly?

Your Firewall <-> ISP <-> INTERNET <-> Office PPTP at static IP

I'm dialing to the internet, and then connecting to the Static IP of
the office, just like your "diagram" shows. I haven't had time to play
with it this weekend, but I'll work on it tonight some.

On Mon, 02 Apr 2007 07:51:40 -0700, mleo2003 wrote:

> I'm dialing to the internet, and then connecting to the Static IP of
> the office, just like your "diagram" shows. I haven't had time to play
> with it this weekend, but I'll work on it tonight some.

Time to play with "WHAT"? Ever heard of quoting some of the text you're
replying to, dimwit?

> User-Agent: G2/1.0
> X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1

Oh. Well, that explains it.

--
"Ubuntu" -- an African word, meaning "Slackware is too hard for me".

mleo2003 wrote:
>
> I'm dialing to the internet, and then connecting to the Static IP
> of the office, just like your "diagram" shows. I haven't had time
> to play with it this weekend, but I'll work on it tonight some.

Ignore the crass attitude of certain boorish responders, but do
read the following sig, and the reference therein. After which you
will be able to post intelligible articles.

--
If you want to post a followup via groups.google.com, ensure
you quote enough for the article to make sense. Google is only
an interface to Usenet; it's not Usenet itself. Don't assume
your readers can, or ever will, see any previous articles.
More details at: <http://cfaj.freeshell.org/google/>



--
Posted via a free Usenet account from http://www.teranews.com

On Mon, 02 Apr 2007 22:06:46 -0400, CBFalconer wrote:

> Ignore the crass attitude of certain boorish responders, but do
> read the following sig, and the reference therein. After which you
> will be able to post intelligible articles.

The OP would do well to ignore the advice of folks like this one, who post
from Windoze, and have two signature blocks, which results in one broken
signature block. It's almost funny if you can get past the pathetic-ness
of it.

--
"Ubuntu" -- an African word, meaning "Slackware is too hard for me".

On Apr 2, 11:14 pm, Dan C <youmustbejok...@lan.invalid> wrote:
> On Mon, 02 Apr 2007 22:06:46 -0400, CBFalconer wrote:
> > Ignore the crass attitude of certain boorish responders, but do
> > read the following sig, and the reference therein. After which you
> > will be able to post intelligible articles.
>
> The OP would do well to ignore the advice of folks like this one, who post
> from Windoze, and have two signature blocks, which results in one broken
> signature block. It's almost funny if you can get past the pathetic-ness
> of it.
>
> --
> "Ubuntu" -- an African word, meaning "Slackware is too hard for me".

Actually, he was right. I am on Google, and forgot that not everyone
can see that my working on "it" meant working on getting the PPTP VPN
working (even though that is the title of this discussion...) I was
trying not to repost a lot of repeated info again, and forgot that not
everyone can see all the previous conversations. I apologize.

I'm using Windows for now, and am trying to obtain the Slackware 11
DVD to install onto this computer soon (dialup sucks for that kind of
thing). And, even if I weren't installing it, my choice of operating
system has nothing to do with my intelligence, I use what I can do to
what I need to do. For some things I do, I need Windows. For other
things, I need Linux. Now, when the entire rest of the world adopts
Linux, I'll gladly wipe the Windows partition off this computer
forever and ever. Until then, I need it to test things out before
sending them to people, so if it does screw something up royally, I've
only FUBAR'd myself, and not someone who is paying me money.

And as a final note to Dan C, I don't appreciate being called a
dimwit. I am still very new to Usenet's, and trying to learn as fast
as possible, but I will make mistakes. I usually admit to them, and
try to learn from them and go on, but when people automatically form
biased opinions based on what they *think* they know, it just gets
under my skin. If you'd kindly not assume I'm a dimwit for using
Windows because I need to, I'll return the favor and not assume your
some ignoramus who has nothing better to do than troll forums and try
to make fun of people and use "clever" words like "Windoze" and
"pathetic-ness". If you want people to take you seriously, please, at
least attempt to act in a way so we can.

To anyone still interested in the Original Topic: I am currently
searching for a solution on Google, but am still having trouble
finding any solutions searching for the terms "iptables GRE". Is there
anything more specific I should be looking for, or should I keep
digging away at these?

mleo2003 <mleo2003@gmail.com> wrote:
> On Apr 2, 11:14 pm, Dan C <youmustbejok...@lan.invalid> wrote:

>> The OP would do well to ignore the advice of folks like this one,
>> who post from Windoze, and have two signature blocks, which
>> results in one broken signature block. It's almost funny if you
>> can get past the pathetic-ness of it.
>>
>> -- "Ubuntu" -- an African word, meaning "Slackware is too hard
>> for me".

> Actually, he was right. I am on Google, and forgot that not
> everyone can see that my working on "it" meant working on getting
> the PPTP VPN working (even though that is the title of this
> discussion...) I was trying not to repost a lot of repeated info
> again, and forgot that not everyone can see all the previous
> conversations. I apologize.

Never apologize to Dan C. Dan C is easily the biggest asshole that
posts to this newsgroup. The only thing he adds is flamage and most
of that goes to what he calls "newbies" because those who are new to
linux are the only people that he knows more about linux.

You would be wise to simply killfile Dan C until you know more about
linux than he (and that won't take long - one install should do it)
and then you can laugh at him like the rest of us do.

cordially, as always,

rm