WZR-HP-G300NH2 trouble passing internet from 3g dongle 2 lan

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Treebark
DD-WRT Novice


Joined: 22 Sep 2017
Posts: 8
PostPosted: Wed Feb 14, 2018 10:04    Post subject: WZR-HP-G300NH2 trouble passing internet from 3g dongle 2 lan Reply with quote
I have a WZR-HP-G300NH2 running the latest beta DD-WRT v3.0-r34929M std (02/12/18 )

I am using a 3g/4g dongle Alcatel l100 which is on the compatibility list

The dongle connects to internet and gives me a wan ip in ddwrt gui, I can ping google.com from gui services - > commands

When I connect a client on lan/wifi the clients are not able to see the internet and ping attempts time out, I put the firewall down but out of ideas

I read somwhere that in betas there is some vlan bug but can't remember further

Please help me
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zloy_elektrik
DD-WRT Novice


Joined: 15 Jan 2012
Posts: 12
Location: Kiev, Ukraine
PostPosted: Mon Feb 19, 2018 2:49    Post subject: Reply with quote
Same problem. Tp-link tl-wr1043nd v1 build v3.0-r35034
Tried different 3G dongles, Huawaei E372 and some old ZTE. ppp0 is UP, dns name resolve via lan/wifi work, but no ping/internet connection. log from serial:
Code:

Huawei E367E398 detected
[  139.810000] usbcore registered new interface driver option
[  139.810000] usbserial USB Serial support registered for GSM modem (1-port)
[  139.820000] option 1-11.0 GSM modem (1-port) converter detected
[  139.830000] usb 1-1 GSM modem (1-port) converter now attached to ttyUSB0
[  139.840000] option 1-11.3 GSM modem (1-port) converter detected
[  139.840000] usb 1-1 GSM modem (1-port) converter now attached to ttyUSB1
[  139.850000] option 1-11.4 GSM modem (1-port) converter detected
[  139.860000] usb 1-1 GSM modem (1-port) converter now attached to ttyUSB2
[  139.880000] usbcore registered new interface driver qcserial
[  139.880000] usbserial USB Serial support registered for Qualcomm USB modem
[  139.950000] usbcore registered new interface driver sierra
[  139.950000] usbserial USB Serial support registered for Sierra USB modem
sh can't open devusbtts2 no such file

Wait till carrier is attached

.Bad argument `100.112.22.143'
Error occurred at line 5
Try `iptables-restore -h' or 'iptables-restore --help' for more information.

100.112.22.143 - modem ip address.
If i log in (via serial) and add rule
Code:
iptables -A POSTROUTING -t nat -j MASQUERADE -o ppp0

ping/internet via lan/wifi begin to work.
Some simple script, that add iptables rule on ppp0 up is a solution, but I have no script writing skills, and in 2018 things like that should work without any scripts.
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Treebark
DD-WRT Novice


Joined: 22 Sep 2017
Posts: 8
PostPosted: Mon Feb 19, 2018 3:16    Post subject: Reply with quote
I ended up installing gargoyle and works on that
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zloy_elektrik
DD-WRT Novice


Joined: 15 Jan 2012
Posts: 12
Location: Kiev, Ukraine
PostPosted: Tue Feb 20, 2018 20:17    Post subject: Reply with quote
Latest gargoyle works with my 3g dongle, but i was unable to setup openvpn client (tun interface up, but has no ip, nothing helpfull in client/server logs..) I'm now again on dd-wrt build 33555, 3g works, openvpn client works (but i'm still trying to setup proper routing between two networks)

UPD. Latest build with 3g working is r33772. Previous builds - 3G working, next built - "Error occurred at line 5 "
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