mjhjmtu

I have a Debian OS on a Banana pi and I use a Huawei 3G modem to connect to the internet from it using the wvdial tool. I also have the usb-modeswitch installed and I think the modem is working as a modem correctly.

The existing setup was working correctly for a few months until I decided to turn off the banana pi and left it for about 3 months and now when I try to connect to the internet using the same settings it is not working.

I am able to connect to the internet carrier but cant use the internet.

When I type ping 8.8.8.8 or ping -I ppp0 8.8.8.8 it does not respond anything and returns:

--- 8.8.8.8 ping statistics ---
194 packets transmitted, 0 received, 100% packet loss, time 193000ms

my wvdial.conf looks like this:

[Dialer Defaults]
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Init3 = AT+CGDCONT=1,"IP","internet.unite.md"
Modem Type = Analog Modem
Studpi Mode = 1
Baud = 9600
New PPPD = yes
Modem = /dev/ttyUSB0
ISDN = 0
Phone = *99#
Username = tmn
Password = tmn

when I run sudo wvdial I get:

--> WvDial: Internet dialer version 1.61
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Sending: AT+CGDCONT=1,"IP","internet.unite.md"
AT+CGDCONT=1,"IP","internet.unite.md"
OK
--> Modem initialized.
--> Sending: ATDT*99#
--> Waiting for carrier.
ATDT*99#
CONNECT
--> Carrier detected. Waiting for prompt.
--> Don't know what to do! Starting pppd and hoping for the best.
--> Starting pppd at Mon Jan 1 15:55:48 2018
--> Pid of pppd: 4608
--> Using interface ppp0
--> pppd: x▒[02]
--> pppd: x▒[02]
--> pppd: x▒[02]
--> pppd: x▒[02]
--> pppd: x▒[02]
--> local IP address 100.68.71.79
--> pppd: x▒[02]
--> remote IP address 10.64.64.64
--> pppd: x▒[02]
--> primary DNS address 172.26.134.20
--> pppd: x▒[02]
--> secondary DNS address 172.26.135.24
--> pppd: x▒[02]

so it looks like it is connecting correctly to the ip 100.68.71.79

And when I do a ping 100.68.71.79 it works correctly. But on any other addresses the ping is not working.

I have checked the modem with the same sim on my windows and it was able to connect and surf the internet.

Here is output of sudo ifconfig

ppp0 Link encap:Point-to-Point Protocol
 inet addr:100.68.71.79 P-t-P:10.64.64.64 Mask:255.255.255.255
 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1440 Metric:1
 RX packets:9 errors:0 dropped:0 overruns:0 frame:0
 TX packets:1245 errors:0 dropped:0 overruns:0 carrier:0
 collisions:0 txqueuelen:3
 RX bytes:186 (186.0 B) TX bytes:64913 (63.3 KiB)

Output of sudo iptables -L

Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

Output of sudo route

Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default 100.68.71.79 0.0.0.0 UG 0 0 0 ppp0
10.64.64.64 * 255.255.255.255 UH 0 0 0 ppp0
192.168.1.0 * 255.255.255.0 U 0 0 0 eth0

here is the pppd info from /var/log/syslog

Jan 1 16:00:22 localhost kernel: [10908.423138] option 1-1.2:1.0: GSM modem (1-port) converter detected
Jan 1 16:00:22 localhost kernel: [10908.424115] usb 1-1.2: GSM modem (1-port) converter now attached to 

ttyUSB0
Jan 1 16:00:22 localhost kernel: [10908.424991] usb-storage 1-1.2:1.1: USB Mass Storage device detected
Jan 1 16:00:22 localhost kernel: [10908.425947] option 1-1.2:1.1: GSM modem (1-port) converter detected
Jan 1 16:00:22 localhost kernel: [10908.426722] usb 1-1.2: GSM modem (1-port) converter now attached to 

ttyUSB1
Jan 1 16:00:22 localhost kernel: [10908.427401] usb-storage 1-1.2:1.2: USB Mass Storage device detected
Jan 1 16:00:22 localhost kernel: [10908.428406] option 1-1.2:1.2: GSM modem (1-port) converter detected
Jan 1 16:00:22 localhost kernel: [10908.429176] usb 1-1.2: GSM modem (1-port) converter now attached to 

ttyUSB2
Jan 1 16:01:02 localhost pppd[4764]: pppd 2.4.5 started by root, uid 0
Jan 1 16:01:02 localhost pppd[4764]: Using interface ppp0
Jan 1 16:01:02 localhost pppd[4764]: Connect: ppp0 <--> /dev/ttyUSB0
Jan 1 16:01:02 localhost pppd[4764]: CHAP authentication succeeded
Jan 1 16:01:02 localhost pppd[4764]: CHAP authentication succeeded
Jan 1 16:01:07 localhost pppd[4764]: Could not determine remote IP address: defaulting to 10.64.64.64
Jan 1 16:01:07 localhost pppd[4764]: local IP address 100.68.71.79
Jan 1 16:01:07 localhost pppd[4764]: remote IP address 10.64.64.64
Jan 1 16:01:07 localhost pppd[4764]: primary DNS address 172.26.134.20
Jan 1 16:01:07 localhost pppd[4764]: secondary DNS address 172.26.135.24