Questions tagged [3g]

3G or 3rd generation mobile telecommunications is a generation of standards for mobile phones and mobile telecommunication services fulfilling the International Mobile Telecommunications-2000 (IMT-2000) specifications by the International Telecommunication Union.

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How can I use a LTE interface inside a docker container?

For my customer, I have to setup docker containers on separate machines that run various services on various physical links. I cannot use "host" mode for my docker containers. So far, I have ...
FLBzh's user avatar
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1 answer
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How to automatically set a default route on RPI when ppp0 (3G) connection is established?

I want to connect a RPI to the internet via an UMTS stick. I could get it working with some manual interaction. As the RPI is place on an external location where i don't have access to all the time, ...
CodeNinja's user avatar
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1 answer
343 views

Mobile Broadband on Ubuntu 18 (Jetson Nano)

I am having trouble setting up cellular connection to T-Mobile with a Huawei E220 stick. It used to be able to connect but it does not connect any more. PIN is disabled, and stick works fine under ...
JC-'s user avatar
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2 votes
0 answers
34 views

USB broadband 3G connecting to a wireless router

In my workplace, the ADSL / internet line (which is connected to a TP-Link router) is down, so I need to use a USB 3G broadband modem to give other computers internet access. I was wondering if there'...
Yaman Obaid's user avatar
2 votes
1 answer
5k views

PPP / 3G modem not getting an IP: No network protocols running

Modem in use: SIM5310 connected to an ARM based board. root@cm-debian:~# uname -a Linux cm-debian 4.4.0-cm-t335-5.1-00030-gd350d89-dirty #29 SMP Sat Nov 4 19:18:48 PDT 2017 armv7l GNU/Linux I am ...
Smokie's user avatar
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0 answers
279 views

Troubleshoot random Network disconnection (USB Modem)

In general how to debug random network disconnection issues? I am working on Intel Edison board which is connected to the internet via a Huawei E8231 USB Modem. Few devices loose the internet ...
Sandeep's user avatar
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1 answer
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Black screen on RDP when coming over 3G VPN

I have a couple Server 2008 R2 boxes that, when accessed using RDP over 3G VPN connection, display a black screen. Couple things that I have noted: 1) When using RDP (same laptops) within the LAN, ...
Jared Scott's user avatar
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1 answer
187 views

Mobile ip assignement using NAT are location dependent?

This post explains very well the logic behind ip assignation for mobile devices but as far as I understand 1 IP can be assigned to various smartphones by the ISP using NAT. I would like to know if ...
Krem's user avatar
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0 answers
899 views

forcing proxy traffic to route via a specific 3G dongle interface

I've searched for details on how to do this but I've been unsuccessful - I wondered if someone could offer up some advice. I have 2 network cards (LAN and 3G in my case), LAN is my main interface (...
lost's user avatar
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2 votes
1 answer
6k views

QOS with iptables and tc with unstable WAN

I have a router/gateway under Linux, I want to add some QoS to reserve bandwidth for a specific flow. This can be done with iptables/netfilter and tc, but all examples start from the fact that you ...
Benoit PHILIPPON's user avatar
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How to route all internet requests to a local pc

I have a friend who works in a small office with ~10 computers + 4 servers. Local service provider told him that there will be a planned maintenance and they will have ~2-3 days of internet downtime. ...
SercioSoydanov's user avatar
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1 answer
2k views

Joining two networks over internet with same ip range

We have two offices in a single Windows 2003 domain and sharing same IP range (no overlapping). Every office has its Microtik router as gateway. Thing is, first office has a solid wired internet ...
Roman Doroshenko's user avatar
1 vote
1 answer
2k views

Possible for Socket communication between 2 internet-connected GSM modems?

I have 2 internet-connected 4G modems connected to 2 separate computers and I'd like to send/receive data between them with sockets (UDP) using the modems' packet-switched 4G Internet connection, not ...
Dutch's user avatar
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6 votes
2 answers
47k views

(reverse-) ssh connection "time out during banner exchange"

I have set up a few 100 embedded boxes to contact HQ by opening up reverse ssh tunnels, each under a new port. This is mostly working fine, but today I encountered a problem with using the tunnel ...
Christian's user avatar
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-2 votes
1 answer
242 views

How to get a portable LTE modem + wifi access point that uses replaceable (AA/AAA) batteries? [closed]

There is a lot of devices, that act as a 3G/4G modems and access points. Their weak part is that they use internal battery, which is expensive/not easily replaceable. The ideal solution would be to ...
Adam Ryczkowski's user avatar
0 votes
2 answers
96 views

Does the DNS resolver know about the application layer protocol in use? [closed]

My iPad's 3G connection usually gets hijacked and shows me my provider's welcome page every time I first browse the internet. I have noticed that this only happens when using HTTP, and pages that use ...
kettlepot's user avatar
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4 votes
3 answers
25k views

Domain name works with 3G connection but not on WiFi

I'm an administrator on two different SBS 2011 servers. Both servers are running MS Exchange. They are on different physical location, different hardware, different domains both internally and ...
Carl's user avatar
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2 votes
3 answers
4k views

Poor Bonding performance over 2 bonded vpn channels

I have two Linux machines that I wish to connect via a bonded link. One machine has two UMTS modems (DN:5mbit UL:1.2mbit) as its gateways, and the other machine has optical fiber (DL:100Mbit UL: ...
frico's user avatar
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1 vote
2 answers
130 views

Remotely manage mobile-broadband-connected linux host [closed]

I have a remote Linux host that is connected to the internet via mobile broadband, and hence does not allow incoming connections. Does anyone know if there is a service that could allow me to remotely ...
Nick Wilkinson's user avatar
0 votes
3 answers
430 views

Broadband router with builtin cellular backup [closed]

At my dad's workplace they often have internet outages that cause them to lose business. My dad wants to have a 3G internet connection as backup to their primary connection. They want to have it ...
Ram Rachum's user avatar
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1 vote
1 answer
342 views

iPhone loads Wi-Fi captive portal page over 3G (iOS 6)

I've made a captive portal using iptables NAT redirection and white-listed MACs. This works nicely, and iDevices pop up my login/terms page after association. However, I've noticed that when 3G is ...
derringer's user avatar
-2 votes
2 answers
936 views

Antenna connection 3G modems [closed]

something less software related. :) I need to identify the antenna connector for two of 3g modems. the connector looks like this: I do have a crc9 antenna i would like to use, so i just have to find ...
Meiko Watu's user avatar
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3 answers
604 views

What's the best fail-safe backup option to access the firewall in case the network becomes unreachable?

We're hosting 12 servers on a rack in a datacenter with minimally sufficient administrative skills to do the job right now. We have VPN to a firewall and a DMZ and internal network configured. But ...
davidparks21's user avatar
14 votes
1 answer
3k views

What are the data link protocols for cellular networks? [closed]

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 ...
Panda Pajama's user avatar
0 votes
1 answer
231 views

How to prevent particular program from using particular network connection under Windows?

In my company almost every user has 3G mobile connection and many of them travel a lot. To prevent expensive mobile charges I'm looking for a solution that would prevent particular program (Windows ...
toffitomek's user avatar
3 votes
1 answer
666 views

UDP Packet Size.. max, ping failing to 3G.. Recalcitrant software vendor

We have a network of 330 clients (Service Vans) connected via 3G to our central office. Currently these clients are connected via a small ruggedized 3G router that establishes the 3G connection and ...
Duncan_m's user avatar
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-2 votes
2 answers
2k views

Access the internet over wireless, but still use our wired LAN?

Currently we have a T1 feeding into a router. This router connects to a switch for our small office clients. Our T1 really sucks, and since no one offers any decent service in our area, my boss ...
Julian's user avatar
  • 1
0 votes
2 answers
2k views

Recomend a 2G/3G/4G router with two or more SIM cards [closed]

I'm looking for a device that takes two or more GSM SIM cards, connects over 2G/3G/4G, depending on what is available in that area, and aggregates those links for higher bandwidth and/or redundancy in ...
klozovin's user avatar
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-5 votes
3 answers
2k views

Cell Tower IP Address Blocks [closed]

I am thinking of creating an app that only allows users connected via a cell tower. Are there IP ranges that are only used by cell towers? I realize that it may be a 'moving target', but does anyone ...
roberthuttinger's user avatar
1 vote
0 answers
224 views

Cisco 2900 series router - 3x 3g HWIC - Can you use the same subnet for each HWIC?

We host a site with a 2900 series router with 3x 3G-HWIC cards installed. It is hosted with telstra and plugs into our corporate WAN. The card authenticates against radius and advertises a route ...
Lance's user avatar
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1 vote
1 answer
2k views

Trying to configure HWIC-3G-HSPA

I'm trying to configure a couple of Cisco 1941 routes. The are both identical routers. Each as a HWIC-1T (Smart Serial interface) and a HWIC-3G-HSPA 3G interface. These routers are to be sent to ...
user1174838's user avatar
1 vote
0 answers
102 views

Cisco 1841 w/ 3x 3g HWIC - Can high utilisation cause disconnect?

It is my experience that when an interface is being overutilised that the queues start to overflow and the device will start dropping packets. I am currently experiencing difficulties with a cisco ...
Lance's user avatar
  • 281
1 vote
1 answer
3k views

Can I limit how much bandwidth is consumed by active directory stuff on windows 7 clients running over 3G

We have a number of windows 7 clients on mobile devices. These are connected over 3G (sometimes wifi) to a LAN. Authentication is through active directory. This is consuming bandwidth by constantly ...
stombeur's user avatar
  • 125
8 votes
6 answers
9k views

Ubuntu failover from Ethernet-to-ADSL-modem to USB 3G dongle

I have an internet connected Ubuntu server, connected by Ethernet to a residential ADSL line. This is adequate, most of the time, but I can't rely upon the ADSL link to be as reliable as I'd like. ...
aSteve's user avatar
  • 231
1 vote
1 answer
6k views

network is not available even when cisco vpn client is connected. wrong route?

I'm using Vodafone 3G modem. I've disabled other network devices in the system (ethernet, wifi, wimax) turned off firewall and antivirus. cisco vpn client connects successfully but I still can not ...
Oleg Vazhnev's user avatar
0 votes
3 answers
3k views

Mapping a private server (running in 3G mobile network) to a public subdomain

Networking newbie question: I am trying to understand what would be the best way to expose several mobile web servers, all of them are behind a router which is a typical 3G network configuration, ...
Jaime's user avatar
  • 59
0 votes
1 answer
116 views

Internet Backup if DSL & Cable Fail [closed]

We have a T1, a DSL Line and a cable modem in each building to assure that we can connect to the internet in case one fails. However during the latest power outage we also lost all of them and were ...
Jimmy's user avatar
  • 111
5 votes
2 answers
10k views

Can 3G networks be packet sniffed / analyzed?

Just wondering if 3G networks can be sniffed like public wifi networks, via wireshark for example (I'm almost sure this is not possible due to encryption, but I just want to make sure?)
foreyez's user avatar
  • 151
2 votes
2 answers
2k views

High Transaction System Recommendations [closed]

I am a SQL Server database administrator and developer and I also have many years experience as an application developer. I currently have a customer with a very big project who is looking to me for ...
Todd's user avatar
  • 21
1 vote
2 answers
1k views

Site not resolving on Att 3g network through Iphone

I have a website www.example.com and it works fine everywhere except when using 3g on my iphone, even works on Edge network. I have installed ping on my iphone and when on 3g it is says unable to DNS ...
Scott's user avatar
  • 11
0 votes
1 answer
147 views

Securing a server by using an allow list based on UDID of 3G mobile devices

How can I create a white list of a server that distinguishes between Mobile devices based on their UDID.
Ric's user avatar
  • 171
1 vote
1 answer
199 views

Ubuntu - 3G Wireless Internet Security

I have a standalone Ubuntu 10.04 server (+ gnome) with a wireless 3G internet connection that is used to download data from an ftp server, process it, and then upload it again. Remote administration ...
JT.WK's user avatar
  • 431
2 votes
2 answers
2k views

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 ...
David Pfeffer's user avatar
0 votes
1 answer
4k views

Error 619 PPTP VPN on Windows 7

I have spent 3 hours trying to work this out but I'm all out of ideas. I have a 3G internet connection via a USB dongle and a Windows 7 laptop, I cannot connect to a PPTP VPN while connected to the ...
Chris's user avatar
  • 23
0 votes
1 answer
1k views

How to create routes for LAN IPs in Windows XP

Hello i'm trying to use lan and 3g network at the same time on XP, as per previous questions i need to create routes for lan ip ranges. How can i do this
Nuno Furtado's user avatar
0 votes
2 answers
847 views

3G/Edge/GPRS IP addresses and geocoding [closed]

So, we're looking to develop a mobile website. On this mobile website, we'd like to automatically populate a user's location (with proper fallback) based on their IP address. I'm aware of geocoding a ...
StephenPAdams's user avatar
0 votes
3 answers
1k views

Cheapest way to get a Cisco firewall with a Sprint data connection?

I work for a Sprint dealer. A customer of ours has sites where the only available internet connectivity is a Sprint cellular signal. They've been using a Cisco ASA5505 firewall. To give it WAN ...
Nathan Long's user avatar
  • 1,545
2 votes
3 answers
502 views

Lan on Wifi, internet on 3g Windows 7

I'm using Windows 7 and I'm currently without DSL because we've just moved. I'm using my iphone tethered as a 3G modem but whenever I turn on the wifi I'm unable to browse the internet. How do I ...
Matthew Walker's user avatar
5 votes
2 answers
32k views

How does 3G/Mobile phones get allocated an IP address? Does this mess with Google Analytics? [duplicate]

This question is in two parts. Q1. How does a mobile phone get an IP address over 3G? Like, would it get the same IP for a shortish period of time (Eg. 1 day, etc)? Because my phone is constantly ...
Pure.Krome's user avatar
  • 6,608
2 votes
4 answers
20k views

How to hack airport extreme to support USB 3G modem? [closed]

Has anyone out there ever tried to hack the Airport Extreme, specifically with regard to the USB port? There are many cellular routers available that provide WiFi sharing of a USB modem link. However, ...
Mike Caron's user avatar