[pptp-server] Help!!

[Santos Jorge Ariel]

Hello, My name is Ariel Santos I'm a net administrator in a sudamerican company. I try to make a proxy vpn so i can send through this machine so many clients as i want. Each one of those clients makes a vpn conection against the pptp server. (Look at the figure below)
                                                                  Linux                              
PPTP 192.168.64.xxx            --------------- > Masq and ---------> Internet --------------> PPTP Server
Client  192.168.64.xxx                                Firewall                              

I followed this How-to, I installed my firewall with the 2.2.17-14 kernel, all modules are running ok (modprobe ip_masq_pptp)
I can make the connection with multiples clients but only one can transfer packages.
When the first client (the one who could send packages) finish the connection all other users lost their connections 
I was wondering if there is something else that i can do, because i tried with a lot of patchs, kernel and i can't solve this problem  

Sorry about my english and i hope your answer as soon as posible

Thanks Ariel Santos

PD: I also tried with ip_masq_vpn.patch.gz


Problem:

I've a problem with GRE (47) protocol; error: Discard order of packets[GRE] when the second conection begins.
         The VPN server (ip: 200.59.152.XXX) can´t get a los of diferent in coming conections from clients who come througth a proxy (ip: 200.58.51.XXX)


    VPN
CLIENT 1
    VPN
CLIENT 2     -----------<      PROXY     >----------------<  VPN SERVER  >
    VPN        -----------<(200.58.51.XXX)>----------------<(200.59.152.XXX) >
CLIENT 3     -----------<     PUBLIC      >----------------<       PUBLIC      >
    VPN
CLIENT 4

What patch should i try ? (for vpn server's kernel)

PD I try with pptpd-1.0.0 and pptpd-1.1.2 and make the patch ip_masq_vpn_2.2.X.patch.gz


thanks for your time 


      A su Disposición.
     
       



                             Jorge Ariel Santos

                                 Operaciones





      Belgrano 430 3º D C1092AAR Buenos Aires Argentina

      Tel/Fax 011-4878-4444 int 55

      Mail santos at workout.com.ar 


     

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