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Setare VPN linux - Documentatie online - Internet prin satelit ONE WAY

***********************************************************************
***   DOCUMENTATIE DE CONFIGURATIE PENTRU CONECTARE VPN-BizarNet        ***
***                                                    Linux                                                      ***
***                           Made By Ago Caba (agocs@sksyu.net)                               ***
***********************************************************************


TXT VERSION

This setup works for 2.2 kernels
1. Setting up the sat card
Software you need:
1. http://www.linuxtv.org/download/dvb/dvbd3.tar.bz2
2. http://www.linuxtv.org/download/dvb/siemens_dvb-0.8.2.tar.gz


Extract the driver (2.) into folder /root/sat/0.8.2/ and the dvbd (1.) also into /root/sat/0.8.2

Compile them:
cd /root/sat/0.8.2/DVB/driver
make
cd /root/sat/0.8.2/dvbd3/
make
cp dvbd /usr/sbin/

If compile fails you must upgrade your libs and gcc

Create following scripts:

</root/sat/makeinsmod>
   #!/bin/sh
   echo -n "Loading dvb kernel modules..."
   (
	   cd /root/sat/0.8.2/DVB/driver/
	   make insmod >/dev/null 2>&1
   )
   echo "done !"
</root/sat/makermmod>

   #!/bin/sh
   echo -n "UnLoading dvb kernel modules..."
   (
	   cd /root/sat/0.8.2/DVB/driver/
	   make rmmod >/dev/null 2>&1
   )
   echo "done !"
</root/sat/W6>
   #!/usr/bin/perl
   open(IN,"/bin/ps ax|");
   @lines=<IN>;
   close(IN);
   @lines = grep(/dvbd/, @lines);
   if(@lines){
   		system("killall -9 dvbd >/dev/null 2>&1");
   }
   open(IN,"/sbin/ifconfig|");
   @lines=<IN>;
   close(IN);
   @lines = grep(/dvb0/, @lines);
   if(@lines){
	   system("/root/linuxsat/sat/Smakermmod >/dev/null 2>&1");
	   sleep(2);
   }
   system("/root/linuxsat/sat/Smakeinsmod >/dev/null 2>&1");
   sleep(2);
   system("/usr/sbin/dvbd -q");
</etc/dvbd.conf>
   international
   dvb_ifname dvb0
   power 1
   symbolrate 27500000
   frequency 11727000
   ttk 1
   diseqc 0
   AFC 0
   polarisation 1
   filter_0 330
   

Now, after starting /root/sat/W6 you should see dvb0 in your interface list (ifconfig).

Set up the system so /root/sat/W6 starts on boot-up.

Setting up the VPN client
You need the following features enabled in kernel
* CONFIG_PPP
* CONFIG_FIREWALL
* CONFIG_IP_FORWARD
* CONFIG_IP_FIREWALL
* CONFIG_IP_ROUTER
* CONFIG_IP_MASQUERADE
* CONFIG_IP_MASQUERADE_ICMP

The software you need:
http://prdownloads.sourceforge.net/pptpclient/pptp-linux-1.1.0-1.tar.gz
BizarNet doesn't use mppe coding so you don't need
http://prdownloads.sourceforge.net/pptpclient/ppp-mppe-2.4.0-4.tar.gz


Extract the pptpclient into /root/pptp-linux-1.1.0-1/
Compile it:
cd /root/pptp-linux-1.1.0-1/pptp-linux-1.1.0/
make
cp pptp /usr/sbin/


Now create the pptp tunnel using /root/pptp-linux-1.1.0-1/pptp-command

1.) start
2.) stop
3.) setup
4.) quit
What task would you like to do?: 3
ls: /etc/pptp.d: No such file or directory
1.) Manage CHAP secrets
2.) Manage PAP secrets
3.) List PPTP Tunnels
4.) Add a NEW PPTP Tunnel
5.) Delete a PPTP Tunnel
6.) Configure resolv.conf
7.) Select a default tunnel
8.) Quit
?: 4

Add a NEW PPTP Tunnel.

1.) Other

Which configuration would you like to use?: 1
Tunnel Name:bizar


Server IP: <The IP adress of the server>
What route(s) would you like to add when the tunnel comes up?
This is usually a route to your internal network behind the PPTP server.
You can use TUNNEL_DEV and DEF_GW as in /etc/pptp.d/ config file
TUNNEL_DEV is replaced by the device of the tunnel interface.
DEF_GW is replaced by the existing default gateway.
The syntax to use is the same as the route(8) command.
Enter a blank line to stop.
route: <Hit Enter here>
Local Name and Remote Name should match a configured CHAP or PAP secret.
Local Name is probably your NT domain\username.
NOTE: Any backslashes (\) must be doubled (\\).

Local Name: <your password>
Remote Name [PPTP]: <Hit Enter here>
Adding bizar- X.X.X.X - passwd - PPTP
Added tunnel bizar
1.) Manage CHAP secrets
2.) Manage PAP secrets
3.) List PPTP Tunnels
4.) Add a NEW PPTP Tunnel
5.) Delete a PPTP Tunnel
6.) Configure resolv.conf
7.) Select a default tunnel
8.) Quit
?: 8


create the file /etc/options.pptp

lock
#debug
#logfd 2
nodetach
require-pap
noauth

empty the /etc/ppp/options file if it exists

create /etc/ppp/pap-secrets containig:

<Username> * <password> *

Create /etc/ppp/ip-up

#!/usr/bin/perl system("/sbin/route add -net 62.41.25.0/24 gw <IP of your default gateway> 2>&1 >/dev/null");
system("/sbin/route del default 2>&1 >/dev/null");
system("/sbin/route add default gw EuroARGV[4] 2>&1 >/dev/null");


Create /etc/ppp/ip-down

#!/usr/bin/perlsystem("/sbin/route del -net 62.41.25.0/24 gw <IP of your default gateway> 2>&1 >/dev/null");
system("/sbin/route del default 2>&1 >/dev/null");
system("/sbin/route add default gw <IP of your default gateway> 2>&1 >/dev/null");


Now create script


</root/pptp-linux-1.1.0-1/pptp-keepalive>
 #!/usr/bin/perl$pptpC="/root/pptp-linux-1.1.0-1/pptp-command  start bizar";
 my EuroLOG=1;
 my Euroerrfile = ">>pptpKA.err";
 my EuroLogfile = ">>pptpKA.log";
 my EuroUip="www.google.com";
 sub ErrLog
 {
	 open(ERR,$errfile);
	 my Europar = localtime;
	 print ERR join (": ",$par,$_[0]);
	 close(ERR);
	 return(0);
 }
 sub Log{
 	if ($LOG){
 		open(ERR,$Logfile);
 		my Europar = localtime;
 		print ERR join (": ",$par,$_[0]);
		close(ERR);
 		return(0);
	}
 }
 Log("pptp-keepalive started !\n");
 while(1){
	 # We'll test if vpn is up
	 open(IN,"/sbin/ifconfig|grep ppp0|");
	 @lines=<IN>;
	 close(IN);
	 @lines = grep(/ppp0/, @lines);
	 if(!@lines){
	    #restart the pptp client
	    Log("ppp0 was not found, starting pptp !\n");
	    system("/usr/bin/killall -HUP pppd >/dev/null 2>&1");
	    system("/usr/bin/killall -9 pptp >/dev/null 2>&1");
	    system("/usr/bin/killall -9 pptp-command >/dev/null 2>&1");
	    system("$pptpC >/dev/null 2>&1");
	 }
	 # We'll test if outside world is ping-able
	 open(IN,"ping -n -c 1 -w 20 EuroUip|");
	 @lines=<IN>;
	 close(IN);
	 @lines = grep(/100\% packet loss/, @lines);
	 if(@lines){
		 #reloading the drivers
		 system("/root/sat/W6 >/dev/null 2>&1");
	 }
	 sleep(10);
 }
 


Set up the system so /root/pptp-linux-1.1.0-1/pptp-keepalive starts on boot-up

Now you can test the pptp with command
/root/pptp-linux-1.1.0-1/pptp-keepalive &

After a while you should see ppp0 in your interface list.

You'll have to modify the pptp-keepalive script if your linux box is connected to the net with ppp. Change the line:
system("/usr/bin/killall -HUP pppd >/dev/null 2>&1");

so it will hang up only pppd used by pptp.

Thanks to:
Ago Caba
SKSYU.NET system admin

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