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Questions tagged [cellular]

25 questions
14
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1 answer

What are the data link protocols for cellular networks?

What are the link layer protocols for cellular networks? There are several platforms for high speed cellular networks. From GSM, to GPRS, W-CDMA, HSPA, LTE, etc. I (mostly) know about the physical details of radio transmission from what I studied at…
Panda Pajama
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10
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1 answer

MTU on mobile data networks

I found various lists of MTUs for different links, but they never contain UMTS, LTE, EDGE, HSPA, GPRS. What are the MTUs of the above mentioned technologies?
bot47
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2 answers

Alternate way to connect a vpn through a MIFI

This has gotten to be a major problem at our company and depending on who I ask, the problem either does not really exist (mfr. and vendor) or is insoluble ( according to most users including techs who know how to prove their point). The problem…
questor
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1 answer

Dynamic DNS service for low qps but high deployment count

I deploy cellular modems that currently have sims with static ip addresses. For various reasons, we may move to providing sims without static ips. The cellular modem supports DDNS (bluetree modem). Since we will have a very low query per second rate…
michael
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1 answer

How (in)secure are cell phones in reality?

I was recently re-reading an old Wired article about the Kaminsky DNS Vulnerability and the story behind it. In this article there was a quote that came across a little bit exaggerated to me: "The first thing I want to say to you," Vixie told…
Aron Rotteveel
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2
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1 answer

Windows 10 as a router: NAT incoming NIC 1 traffic out via NIC 2

I have a Windows 10 LTSB PC that I am trying to treat as a server (Running IIS and SQL) and a router, but the router side is giving me issues. I have 1 Ethernet based NIC (192.168.1.180 no gateway) and 1 cell modem based NIC (100.100.7.31 gateway:…
heyufool1
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1 answer

nginx not serving site on cellular data connection

I have a web server running nginx. If I access the website through a wifi connection, it loads the website. If I access it using LTE on my phone, it just shows the default "Welcome to nginx!" page Here is my site config file: server { listen…
andrewtweber
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How do I troubleshoot an IPsec tunnel (from a cellular router to a public server)?

I'm new to IPsec and struggling with a setup that might soon be widely used in our operations (provided I do understand it, eventually...). A cellular router (blackbox by netModule, from its log messages it seems to be running Linux and OpenSwan)…
Hanno Fietz
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2 answers

Keeping a persistent 3G connection on Windows

I'm in charge of managing an array of Windows Embedded 7 Standard based PCs (they act just like plain old Windows 7). The computers have 3G cards as their only means of communication, and are on buses. Right now, the 3G cards are configured in NDIS…
David Pfeffer
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5 answers

Extending Cell Phone Coverage and Reception Strength in Basement - Do Cell Phone Extenders Work?

In our offices we have a very strong cell phone signal above ground, however in our conference room in the basement, Verizon & Sprint have almost no coverage (while AT&T works, it is 1 or 2 bars vs full bars above ground). We are looking into…
Dave Drager
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How Does Droid's Exchange Connector Work?

TL;DR: flow chart http://img2.pict.com/6e/d6/a7/2101822/0/mockup.png I'm curious about how email flows into the Droid handset from my corporate MS Exchange server. If I run through the regular Exchange config wizard and configure it to talk…
Michael Haren
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Should a MobiTex service with a highly resilient website offer content over WAP?

I'm trying to offer services over the MobiTex network (also see wiki) and want to reduce double-work. I'm trying to understand if it is a good idea to WAP enable my website. Given that WAP usage is increasing (since MMS is a hybrid of SMS + WAP),…
makerofthings7
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Pantech UML290 Verizon Driver

Is there a separate driver available for Pantech UML290 4G LTE USB Modem? I would prefer not to have to install VZAccess, but use the default Windows DUN support.
Mitch
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Take hash of a string in nginx?

I want to distribute traffic in an nginx reverse proxy across upstreams based on a string that's present in a header, but do so both deterministically and performantly. Situation-wise, think something like a cellular routing setup. In order to do…
a p
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Hosting a bunch of sites on a server with Verizon DSL?

I have 50 demo sites (running on .Net 3.5) that are very resource intensive. So shared hosting or using a Virtual Server is not working out. These sites are not production and do not use a lot of bandwidth. I can buy a server from Dell for about…
user29266
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