M and I were e-mailing off-list about setting up a VPN.
M, do you mind if I repost those e-mail's here?
Regards,
- Robert
On Aug 30, 2005, at 8:53 AM, Ed Howland wrote:
Jon,
This is great. We have a question about VPNs. We want to create a VPN
gateway between the library and Robert's machine (cwelug.org) . SSH
tunnels are not enough, because we can only forward one port at a time
and we can't make FTP work because it needs a second outgoing port
to be
tunnelled (in PASV mode.)
What software should we use? I know about FreeSWAN and OpenVPN.
Thanks,
Ed
Jon Drews wrote:
Hi:
I did some experiments with running UNIX laptops in adhoc mode and
projecting X apps from one to the other. I thought I would send in
what I did in light of the previous interest about VPN and Linux thin
clients.
I had an OpenBSD laptop and a FreeBSD laptop. Here is what I did to
get the FreeBSD laptop to use the X applications from the OpenBSD
laptop.
On the OpenBSD laptop I did this:
$ /usr/bin/sudo ifconfig wi0 inet 192.168.0.4 netmask
255.255.255.0 nwid cwelug
mediaopt adhoc
and on the FreeBSD laptop I did:
# ifconfig wi0 inet 192.168.0.3 netmask 255.255.255.0 ssid cwelug
mediaopt adhoc
NOTE: the laptops cannot be connected to any other network for this
adhoc mode to work.
Also note that "nwid" is a synonym for "ssid".
I had the appropriate entries in my /etc/hosts files. For FreeBSD
that would be:
127.0.0.1 mobile.silbsd.org localhost.silbsd.org
localhost
192.168.0.3 mobile.silbsd.org mobile
192.168.0.4 notebook.silbsd.org notebook
notebook is the OpenBSD laptop and mobile is the FreeBSD laptop.
I ran an X session on the FreeBSD laptop, then opened an Xterm and
did
as an ordinary user:
[EMAIL PROTECTED] ssh -X [EMAIL PROTECTED]
I discovered the following:
1) From the Xterm that I initiated the X enabled ssh connection I
could "background" many applications and run them simultaneously. It
looked like this:
[EMAIL PROTECTED] ssh -X [EMAIL PROTECTED]
[EMAIL PROTECTED]'s password:
Last login: Mon Aug 29 18:27:23 2005 from mobile.silbsd.org
OpenBSD 3.6-stable (GENERIC) #5: Sat Jul 9 07:54:17 MDT 2005
Welcome to OpenBSD: The proactively secure Unix-like operating
system.
Please use the sendbug(1) utility to report bugs in the system.
Before reporting a bug, please try to reproduce it with the latest
version of the code. With bug reports, please try to ensure that
enough information to reproduce the problem is enclosed, and if a
known fix for it exists, include that as well.
$ gnumeric &
[1] 29884
$ /home/xfce/docs/spreadsheets/checking2005.gnumeric
$ octave &
[2] 13200
$ jobs
[2] + Stopped (tty output) octave
[1] - Running gnumeric
$ xterm -e octave &
[3] 18231
$ /home/xfce/docs/BSDCert/survey/SPREADSHT_ALL_MS2KXLS.gnumeric
/home/xfce/docs/BSDCert/survey/SPREADSHT_ALL_MS2KXLS.gnumeric
/home/xfce/docs/BSDCert/EnglishSurveyResults.xls
[3] - Done xterm -e octave
$
2) I found that if I opened a file manager I could click on the files
and they would open with the appropriate application.
3) I opened two large Gnumeric spreadsheets and four instances of
Gimp. Each Gimp loaded a large digital camera picture. I found that
Gimp was pretty responsive when doing editing operations and zooming
the large digital jpegs.
4) I then ran GMplayer from the server laptop and found that it would
play the movies but that they were in slow motion.
5) I tried to drag n' drop from a GUI file manager on the server to
the same type of GUI file manager on the client but drag n' drop did
not work.
6) I could copy and paste between applications on the client and
server. Actually I only tried tried this between two Vi editors. One
was on the client and one was on the server.
I ran top on the client laptop (the FreeBSD one) and the memory
consumption was quite low:
last pid: 255; load averages: 0.04, 0.08, 0.03 up 0
+00:29:13 20:44:39
44 processes: 1 running, 43 sleeping
CPU states: 0.0% user, 0.0% nice, 0.0% system, 0.5% interrupt,
99.5% idle
Mem: 28M Active, 13M Inact, 19M Wired, 24K Cache, 17M Buf, 92M Free
Swap: 304M Total, 304M Free
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU CPU
COMMAND
190 bsd 2 0 21024K 15204K select 0:19 1.42% 1.42%
XFree86
255 bsd 28 0 1996K 1220K RUN 0:00 2.69% 0.49% top
220 bsd 2 0 2864K 2360K select 0:06 0.05% 0.05% ssh
231 bsd 2 0 2844K 2304K select 0:06 0.00% 0.00% ssh
I think this method is viable alternative to projecting the entire
desktop from the server onto it's clients.
--
Ed Howland
WDT Solutions, LLC.
[EMAIL PROTECTED]
(314) 962-0766
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