how to configure windows10 as router for mobile broadband

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Hello, I'm trying to configure w10 as router to share mobile broadband which is connected to win10.

My hardware is like the following:

 

LAN -- W10 -- mobile usb MODEM ---> internet.

192.168.137.0/24 --- 192.168.137.2 on ethernet and ip alias 192.168.137.1 on cellular net ----> default gw.

 

 

I just want route all the lan traffic through the windows10 box to the internet.

I overcome some obstacles ... for example the mobile connection goes down when I connected the ethernet cable. Then I enabled the following reg entry to enable both interface to work:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WcmSvc\Local\fMinimizeConnections DWORD32 ---> 0

 

also I enabled the routing ip with the following reg entry:

 

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\IpEnableRouter DWORD32 ----> 1

 

I also tried to share the internet connection from the ethernet interface making right click on the eth interface --> share internet connection..

 

anyway now I fired up a traffic capture software and I see the ping that come from lan (on my other pc) that should go to 8.8.8.8 then it's redirect to the cellulare net gateway but it's not routed... I show you the result from the sniffer:

 

17:44:28.855999 ARP, Request who-has 192.168.137.1 tell 192.168.137.2, length 28
17:44:29.019169 IP 192.168.137.6 > 8.8.8.8: ICMP echo request, id 16436, seq 567, length 64
17:44:29.856664 ARP, Request who-has 192.168.137.1 tell 192.168.137.2, length 28
17:44:29.977790 IP 192.168.137.6 > 8.8.8.8: ICMP echo request, id 16436, seq 568, length 64
17:44:30.855963 ARP, Request who-has 192.168.137.1 tell 192.168.137.2, length 28
17:44:30.938790 IP 192.168.137.6 > 8.8.8.8: ICMP echo request, id 16436, seq 569, length 64
17:44:31.856441 ARP, Request who-has 192.168.137.1 tell 192.168.137.2, length 28
17:44:31.901478 IP 192.168.137.6 > 8.8.8.8: ICMP echo request, id 16436, seq 570, length 64
17:44:32.856293 ARP, Request who-has 192.168.137.1 tell 192.168.137.2, length 28
17:44:33.018122 IP 192.168.137.6 > 8.8.8.8: ICMP echo request, id 16436, seq 571, length 64

 

the following is my current routing table (im sorry, it's in italian):

λ  route print
===========================================================================
Elenco interfacce
 13...84 47 09 11 81 43 ......Realtek PCIe GbE Family Controller #2
 25...00 a0 c6 00 00 18 ......SimTech HS-USB WWAN Adapter 9001
  1...........................Software Loopback Interface 1
===========================================================================

IPv4 Tabella route
===========================================================================
Route attive:
     Indirizzo rete             Mask          Gateway     Interfaccia Metrica
          0.0.0.0          0.0.0.0     10.153.34.25     10.153.34.26    306
          0.0.0.0          0.0.0.0    192.168.137.1    192.168.137.2     71
     10.153.34.24  255.255.255.252         On-link      10.153.34.26    306
     10.153.34.26  255.255.255.255         On-link      10.153.34.26    306
     10.153.34.27  255.255.255.255         On-link      10.153.34.26    306
        127.0.0.0        255.0.0.0         On-link         127.0.0.1    331
        127.0.0.1  255.255.255.255         On-link         127.0.0.1    331
  127.255.255.255  255.255.255.255         On-link         127.0.0.1    331
    192.168.137.0    255.255.255.0         On-link     192.168.137.2    326
    192.168.137.0    255.255.255.0         On-link      10.153.34.26    370
    192.168.137.0    255.255.255.0    192.168.137.1     10.153.34.26     51
    192.168.137.2  255.255.255.255         On-link     192.168.137.2    326
  192.168.137.255  255.255.255.255         On-link     192.168.137.2    326
  192.168.137.255  255.255.255.255         On-link      10.153.34.26    306
        224.0.0.0        240.0.0.0         On-link         127.0.0.1    331
        224.0.0.0        240.0.0.0         On-link     192.168.137.2    326
  255.255.255.255  255.255.255.255         On-link         127.0.0.1    331
  255.255.255.255  255.255.255.255         On-link     192.168.137.2    326
===========================================================================
Route permanenti:
   Indirizzo rete             Mask   Indir. gateway Metrica
          0.0.0.0          0.0.0.0    192.168.137.1       1
===========================================================================

IPv6 Tabella route
===========================================================================
Route attive:
 Interf Metrica Rete Destinazione      Gateway
  1    331 ::1/128                  On-link
 13    281 fe80::/64                On-link
 13    281 fe80::9ca5:19b4:204e:420b/128
                                    On-link
  1    331 ff00::/8                 On-link
 13    281 ff00::/8                 On-link
===========================================================================
Route permanenti:
  Nessuna

 

 

thanks with heart for any help.

 

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