Date: Sun, 17 Apr 2016 21:42:52 +0000 (UTC) From: Jouni Laakso <jounijl@yahoo.co.uk> To: Adrian Chadd <adrian@freebsd.org> Cc: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: Re: Huawei E3372 ( sonera.fi ) Message-ID: <1081793933.2190222.1460929372233.JavaMail.yahoo@mail.yahoo.com> In-Reply-To: <CAJ-Vmon6hLf5=xn8N9Jju5z6DWaA_dxSUenBg4UbgJ7k4FFn3g@mail.gmail.com> References: <CAJ-Vmon6hLf5=xn8N9Jju5z6DWaA_dxSUenBg4UbgJ7k4FFn3g@mail.gmail.com>
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I'm happy someone answered and I'm not talking to myself. I finally had a question.
1) How to get two ways communication to succeed with this or these devices? Overall, how any IoT usb modem is connected with static IP-address?
I have tried ipfw forward and tcpdump to snoop the traffic from ue0. I have put ipfw to forward all incoming packets to httpd-server. Both http and https. I can not see any traffic coming in from the modem 192.168.1.1. The forward rule is:
${fwcmd} add 100 fwd ${wwwip},80 tcp from any to 192.168.1.1 80 recv ${outif}
${fwcmd} add 100 fwd ${wwwip},443 tcp from any to 192.168.1.1 443 recv ${outif}
This works with the proxy.
This is not excactly NAT but no packets are found with ' tcpdump -n -i ue0 ' either. The modem has a www -admin page at http://192.168.1.1. I could not reach it's address from the Internet but sending to the public NAT address, finally the admin -page loaded to the web browser. Trying with google translate did not give results. Trying with another IP-connection did not reach the IP at all.
1.1) Should I enable PPP -link over the connection somehow? PPP was the connection method with the previous usb-modems and the IP at tun0 interface was given from the service provider.
2) Does anyone know how to switch the E3372 modem to a state giving a device to use the AT-commands? With these commands, listing the available modes is possible and solving the possibilities to use the modem revealed.
Devices now are:
crw------- 1 root operator 0xd1 Apr 17 21:26 pass3
crw-r----- 1 root operator 0xd2 Apr 17 21:26 da0
lrwxr-xr-x 1 root wheel 9 Apr 17 21:26 ugen4.2 -> usb/4.2.0
crw-rw-rw- 1 root wheel 0xc6 Apr 17 22:46 dsp0.0
crw------- 1 root wheel 0x4 Apr 18 00:07 console
crw-rw-rw- 1 root wheel 0xd Apr 18 00:33 null
3) What is a correct IoT modem type? Is PPP ok with static IP-addresses or does it have to have NAT capabilities? Which ones have this?
Answear to the question: Sorry my inaccuracy. It just seems to me that the latency is higher from just using the web browser. I have so many tests going on that I just haven't tested more accurately. Today I have been using the link first time with an antenna. The results would have been inaccurate. Personnally I think it can be either block sizes or differences in locking the cdce versus the u3g cuaU. Really I do not know. Maby these are the usual? Is it better to leave the modem to an external device or use it with the web browsers and applications? By the way, I'm using only 2 cores. This one uses less power. Maby it can affect the results?Maby it's just the antenna. E3372 has two antenna links. A polarized antenna or two antennas far apart could give better results.
This is the configuration:
192.168.1.100 <ue0> <--- cdce/usb ---> <modem interface> 192.168.1.1 <------ ISP 4G ------> <public IP>
It is not possible to add a NAT address to the Huawei modem because it does not have this kind of capability? At least not from the Admin-page. Or does it just send the packets destined to 192.168.1.1 to network 192.168.1.0 ? Tcpdump showed that nothing came back using the SSL-ports. With HTTP the public IP appeared many times until it was switched (maby with http redirect or similar?) back to the Admin page 192.168.1.1. The URL was first http://192.168.1.1/html/index.html?url=<the public IP> .
Do I have to buy a new modem and what kind of a modem it should be?
br, Jouni
On Sunday, April 17, 2016 9:56 PM, Adrian Chadd <adrian@freebsd.org> wrote:
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>hi! this is cool to know! any ideas why the latency is higher?
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>-a
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>On 16 April 2016 at 13:44, Jouni Laakso via freebsd-wireless
><freebsd-wireless@freebsd.org> wrote:
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>> Hello list,
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>> I wanted to send this information to help others in their quest of 4G connectivity with FreeBSD here at Europes continent and in Finland. Huawei does not include a lot of information about their products. These 4G-network modems are usually provided by the subscriberline companies and with their own products. This one was from Sonera (Teliasonera, .se and .fi) here in Finland.
>> Huawei E3372 seems to be a CDCE device. /boot/loader.conf has to have a line if_cdce_load="YES". Only usb_modeswitch works with this one. Command:
>> /usr/local/sbin/usb_modeswitch --default-vendor 0x12d1 --default-product 0x1f01 -J
>> swithes to the CDCE mode. Device ue0 appears to be configured (with ifconfig -command). Using 'dhclient ue0' a network address is found and using the address and adding a default router the network interface is usable. An admin HTTP-page can be found from http://192.168.1.1. CDCE has two network interfaces at both ends of USB. Both ends can be configured with their own IP-address.
>> ID:s idVendor = 0x12d1 idProduct = 0x1f01 are switched to ID:s idVendor = 0x12d1 idProduct = 0x14dc . This seems to be correct since the connection to the Internet succeeded with cdce.
>> Using u3g.c:U3G_DEV(HUAWEI, K3372_INIT, U3GINIT_HUAWEISCSI)
>> Causes the modem to appear as a device id 0x1442 . Using this, only NTP port was listening. Maby this is a ntp mode. Using:U3G_DEV(HUAWEI, E3372_INIT, U3GINIT_HUAWEISCSI2)
>> does not give any results. These are the current possibilities if compiling a new kernel every time is possible.
>> It would be easier if a device had only one identification code. Reading about the different codes from usb_modeswitch list, it is maby clear that the service provider can change the device ID:s. This is not very easy to the users. If the device was only a modem, it would be usable without the flip-flop states of the modem-devices. ISO image is given with Windows and Linux drivers or software and after installing the software, the state becomes a modem state. Possibly with a HTTP-interface to connecto to the Internet.
>> Quick test with Linux shows that the latency time is less with Linux. Previously using PPP with these kind of wireless devices, FreeBSD has shown best latency times. This is an estimate. Using an external modem (propably Linux inside) caused more latency with PPP over the previous 3G link.
>>
>> With best regards,
>>
>> Jouni L.
>> _______________________________________________
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