[AusNOG] Ethernet + 4G router recommendations

Radek Tkaczyk radek at tkaczyk.id.au
Wed Nov 5 15:35:39 EST 2014


Thanks for the suggestions guys.

Have lots of options to work with here.

Radek

-----Original Message-----
From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Bryn Loftus
Sent: Wednesday, 5 November 2014 2:31 PM
To: Ken Wilson
Cc: ausnog at ausnog.net
Subject: Re: [AusNOG] Ethernet + 4G router recommendations

The Dovado range can do bridgemode with some modems. They have some nifty usb modem monitoring as well.

Sent from my iPhone

> On 5 Nov 2014, at 3:16 pm, Ken Wilson <ken.wilson at opengear.com> wrote:
> 
> You can do bridge mode if you’ve got a linux device terminating the 4G connection.
> The basic method is to get the connection up, strip the IP address off the 4G connection, and provide it to a host down stream via DHCP.
> Set a default gateway out the 4G modem - (if its an CDC-ethernet 4G modem as most are, you’ll have a gateway assigned you can use), set up a static route to the 4G IP address via the ethernet adapter connected to the downstream host, and enable proxyarp on that ethernet adapter.
> 
> 
>> On 5 Nov 2014, at 8:30 am, Bruce Forster <bruce at tubes.net.au> wrote:
>> 
>> Not sure about bridge mode... however with the l2tp + ppp / ipsec you dont have double nat the tunnel does pass over the nat from the TP-Link device but all other traffic is inside the tunnel...
>> 
>> 
>> 
>> 
>> On Wed, Nov 5, 2014 at 7:53 AM, Karl Auer <kauer at biplane.com.au> wrote:
>>> On Wed, 2014-11-05 at 07:28 +1000, Bruce Forster wrote:
>>> If you are really pressed for cash... you can get one of these:
>>> http://www.computeralliance.com.au/tp-link-tl-mr3020-portable-wirele
>>> ss-n-150mbps-router/3g-support
>> 
>> Ignorant question: Can something like that be used in bridge mode, as 
>> one might with an ADSL modem? Or is 3G/4G handled differently?
>> 
>> This device seems to do bridge mode over 3G:
>> 
>>   http://www.wificamit.com/super-modem-33.html
>> 
>> For the OP's requirement, something like that (or the TP-Link) in 
>> bridge mode might be nicer than managing a dongle or built-in 3G/4G. 
>> Also avoids double NATting.
>> 
>> Regards, K.
>> 
>> --
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> ~~
>> Karl Auer (kauer at biplane.com.au)
>> http://www.biplane.com.au/kauer
>> http://twitter.com/kauer389
>> 
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>> 
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>> 
>> --
>> Regards,
>> 
>> Bruce
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