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Re: Pregunta Ras

On Thursday 10 December 2009 7:36:10 am you wrote:
> colega te escribi al privado para evitar lio en la lista

No pasa nada, es una pregunta sobre Debian.

> Si lo que quiero hacer es eso montar un ras sobre debian para conectarme
> desde un window en casa

Es una VPN y las opciones son varias, dentro de ellas ppp en Debian + pptp en 

> Colega yo soy el admin del la empresa, como no voy a tener permiso,
> Que es lo que tengo que poner a ejecutar en el cron que no puso que habia
> que ejecutar?

Tendras que leer las man, yo no soy programador y necesitas un script.

> Gracias de Todos Formas por la Atencion Prestada

No hay problema de hacer esa pregunta en la lista, lo unico que pedimos es que 
seas claro en lo que quieres hacer, ya que asi, seria mas efectivo y serviria 
a mas personas.

Te paso un como en Ingles y otro en otro mensaje, pero seguimos en la lista, 
por favor.

March 25th, 2006, 10:07 PM
First I wanted to say this is not another how to setup your dialup connection 
to the ISP.:mrgreen: 
 This doesn't pretend to be a complete howto but I've seen quiet a few posts 
on this topic in Ubuntu forums unanswered, and it took me a long time to 
figure it out myself. I'm not an expert on this but it worked for me and 
hopefully will work for you or at least will get you started. For those who 
interested in setting up a callback server this is the first step, you will 
have to edit some more config files, but you will have to do this first. 
Links to more info and credits are at the end.
 Part I . The short version:D on how to get remote access to your Ubuntu box 
via modem. Install mgetty
 sudo apt-get install mgetty
 Add a line at the end of file /etc/inittab
 S0:2345:respawn:/sbin/mgetty ttyS0
 If your modem is on COM1. 
 Initialize init by typing
 sudo init q
 Now from Win you can use HyperTerminal to connect to your Ubuntu box with 
your user name/pass.
 For those who want more here is a real deal;) 
 Part II 
 The problem: Establish PPP connection to Ubuntu server from a remote location 
using a modem and to share internet connection.
 Laptop modem<> Server modem <> Ethernet Router <> Cable/DSL modem <> Internet
 Assumptions: drivers for your modems already installed and modem is at ttyS0. 
I have an external modem attached to COM1 - ttyS0, COM2 will be ttyS1. I 
didn't have X installed so I was using nano to edit conf files, you can use 
gedit if you have X installed or any other editor. Make sure your are 
familiar with the interface of the editor before you start modifying files. 
Make sure you create backups of the files before you modify them. You will 
need to use sudo or login as root for most of the tasks. If you don't know 
how to configure your dial up on your client look for a dial up howto or 
Ubuntu docs. I also assume that you already have your local nework including 
routers properly configured and have an access to the Internet from your 
Ubuntu server. 
 Part II.a - Dial in configuration
 1. If not already installed use synaptic or apt-get to install ppp and mgetty 
packages. ppp should be already installed by default so
 sudo apt-get install mgetty
 2. Create a group ppp by adding a line in file /etc/group ppp:x:1001:
 3. Create a new user "pppuser" or whatever you will use for your dial in 
connection and assign a password by using
 sudo adduser pppuser
 edit file /etc/passwd or use sudo vipw to change entry for pppuser to 
 4. Add a line to the file /etc/inittab S0:2345:respawn:/sbin/mgetty ttyS0 for 
modem on ttyS0. Or S1:2345:respawn:/sbin/mgetty ttyS1 for modem on ttyS1 That 
will let mgetty to accept incoming calls
 5.Make a new file /usr/sbin/ppplogin and add the following in there 
 # PPP login script
 mesg n
 stty -echo
 exec /usr/sbin/pppd -detach modem debug crtscts
 6. Set access to the ppplogin file and etc/ppp directory
 chmod 750 /usr/sbin/ppplogin
 chown root:ppp /usr/sbin/ppplogin
 chmod 775 /etc/ppp
 chown root:root -R /etc/ppp
 7. Restart init by typing init q
 If you're use external modem it should be on before that.
 8. Open file /etc/mgetty/login.config Comment out everything in there and add 
a line 
 /AutoPPP/ - a_ppp /usr/sbin/pppd file /etc/ppp/options
 9. Open file /etc/ppp/options and make sure these lines are uncommented. If 
anything else is uncommented it probably should be commented.
 asyncmap 0
 ms-dns #put your dns server ip here
 In my case the ms-dns entry had an ip of my router, if you using Linksys 
router it's by default unless you changed it.
 10. Create a file /etc/ppp/options.ttyS0 for the modem on ttyS0 and add 
following in there
 Where first address is the address of your server for ppp connection which I 
think, should be different from your eth ip. The second address is the 
address that will be assigned to the client when connection is established. 
It will probably make life easier, unless you know what you doing, if all 
those addresses on the same subnet as your other computers on the network. 
(ip starts with the same 192.168.1.x numbers)
 You can substitute noauth for a debug line, this way it will log some info 
about you connection in a syslog.
 11. Edit file /etc/ppp/pap-secrets
 find a line after # Every regular user can use PPP and has to use passwords 
from /etc/passwd
 It should look something like that
 * hostname "" *
 substitute hostnatname with * so it looks like that
 * * "" *
 If you don't do that pap will not authenticate you and you'll be immediately 
 Now you're able to connect using dial-up connection from you laptop or a 
remote office into your Ubuntu server and use ssh or putty if you're using 
 Part II.b - Accessing internet from a remote client
 I'm sure there other or better solutions to that, but that was easy enough 
and it worked for me.
 sudo apt-get install ipmasq
 Done. ipmasq automatically senses all your interfaces and initializes IP 
Masquerade forwarding/firewalling and allows you to connect to the rest of 
your network and the Internet.
 I didn't have to do any more configurations for that.
 Credits: Part I was inspired by debenham 
http://www.ubuntuforums.org/member.php?u=21302 in his answer to benson in 
 Part II and for more information
 http://linuxgazette.net/issue77/sunil.html - Setting Up a Linux-based PPP 
Callback server
 and http://tvilda.stilius.net/callback_en.php - Debian PPP dialin and 
callback server
 http://www.aboutdebian.com/ - Some info on networking and other topics
 http://qref.sourceforge.net/ - Debian reference
 Those of you who are interested in setting up a callback server need to read 
links above. If security is a concern or you're in a business environment you 
should probably have a different setup.
 Good luck
January 27th, 2007, 02:34 PM
Thanks for the HOWTO Alex, I wanted to add a couple of remarks here since I 
had an awful time getting mgetty to work correctly for me, eventually 
compiling mgetty on Slackware before I figured out what wasn’t working. Maybe 
it’s modem-specific (I am using a Multitech MT5600ZDX), but my modem would 
never pick up correctly. The mgetty log files showed the modem returning NO 
CARRIER instead of the CONNECT string, mgetty would then bail and respawn, 
here is an excerpt from the log file (/var/log/mgetty/mg_ttyS0.log):
 01/25 23:34:29 yS0 waiting for line to clear (VTIME=1), read:
 01/25 23:34:29 yS0 send: \dATQ0V1H0[0d]
 01/25 23:34:30 yS0 waiting for ``OK''
 01/25 23:34:30 yS0 got: ATQ0V1H0[0d]
 01/25 23:34:30 yS0 CND: ATQ0V1H0[0d][0a]OK ** found **
 01/25 23:34:30 yS0 send: AT[0d]
 01/25 23:34:30 yS0 waiting for ``OK''
 01/25 23:34:30 yS0 got: [0d]
 01/25 23:34:30 yS0 CND: OK[0a]AT[0d]
 01/25 23:34:30 yS0 CND: AT[0d][0a]OK ** found **
 01/25 23:34:30 yS0 waiting for line to clear (VTIME=3), read: [0d][0a]
 01/25 23:34:30 yS0 removing lock file
 01/25 23:34:30 yS0 waiting...
 01/25 23:35:22 yS0 select returned 1
 01/25 23:35:22 yS0 checking lockfiles, locking the line
 01/25 23:35:22 yS0 makelock(ttyS0) called
 01/25 23:35:22 yS0 do_makelock: lock='/var/lock/LCK..ttyS0'
 01/25 23:35:22 yS0 lock made
 01/25 23:35:22 yS0 wfr: waiting for ``RING''
 01/25 23:35:22 yS0 got: [0d][0a]RING[0d]
 01/25 23:35:22 yS0 CND: RING
 01/25 23:35:22 yS0 wfr: rc=0, drn=0
 01/25 23:35:22 yS0 CND: check no: 'none'
 01/25 23:35:22 yS0 send: ATA[0d]
 01/25 23:35:22 yS0 waiting for ``CONNECT''
 01/25 23:35:22 yS0 got: [0d]
 01/25 23:35:24 yS0 CND: OK[0a]NO CARRIER
 01/25 23:35:24 yS0 found action string: ``NO CARRIER''
 01/25 23:35:24 ##### failed A_FAIL dev=ttyS0, pid=4661, caller='none', 
conn='', name=''
 Long story short, what I finally figured out is that mgetty isn’t sending the 
correct init string to the modem, so it apparently doesn’t know that it is 
supposed to CONNECT when the phone rings. The problem init line (highlighted 
in blue) contains only “AT”; to get the modem to pick up I had to make mgetty 
send “ATS0=0Q0&D3&C1” instead. The default value for this string is hardcoded 
at compile-time, but we can use the init-chat parameter 
in /etc/mgetty/mgetty.config to specify the entire init sequence. I replaced 
the contents of mgetty.config with the following:
 data-only YES
 init-chat "" \dATQ0V1H0 OK ATS0=0Q0&D3&C1 OK
 When I restarted mgetty and dialed in the modem picked up immediately and 
connected, bringing me straight to a login prompt.
 I hope this helps other people who are banging their heads on the wall.

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