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Questions tagged [ppp]

The Point-to-Point protocol enables packet-based communication over a serial interface.

146 questions
28
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4 answers

How to use "adb ppp"?

I am trying to connect from my Android device to the host using usb and ppp. There seems to be an option "adb ppp " that can be used. But I can't find an explanation on how to use it. There is an old discussion here. But they ended patching adb. I…
huherto
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3 answers

PPP Server on Windows

We have a solution where some hardware connects to a COM port on a Win 7 machine, and interacts with our Java app. The hardware wants to use a PPP Server to transparently connect to an other server over TCP/IP. Does anyone have a suggestion on how…
Marius Reppe
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1 answer

What is difference between /dev/ppp and /dev/net/tun?

What is difference between PPP and tun/tap? Both seem to be for implementing networking over user-space programs. With PPP, kernel creates ppp%d for use and let userspace program provide the backend for it. With tun/tap, kernel creates tun%d for use…
Vi.
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4 answers

How does PPP or Ethernet recover from errors?

Looking at the data-link level standards, such as PPP general frame format or Ethernet, it's not clear what happens if the checksum is invalid. How does the protocol know where the next frame begins? Does it just scan for the next occurrence of…
Gili
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1 answer

Raspberry Pi sim900 Default Internet Access

I have set up a ITEAD sim900 GSM module to interface with raspberry pi. I believe I have established a gprs connection to AT&T though wvdial as I get these results. --> WvDial: Internet dialer version 1.61 --> Initializing modem. -->…
infobug
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5
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1 answer

STM32 LWIP PPPos implementation

On my STM32F7 I have to connect a 3G modem using serial port. I can communicate with the modem using AT commands. I would like to use PPPos (PPP over serial) library from LWIP to enter in PPP mode. So I take a long look at the official…
lgm42
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5
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2 answers

Why GPRS modem provides embedded TCP/IP stack

My colleague and I are mining the GPRS MODEM market for a module suitable for use with embedded Linux. During the market scan, we see that several vendors highlight that their MODEMs include an embedded TCP/IP stack. This makes me wonder: when we…
Christian Madsen
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5
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TCP/IP over shared serial bus

Is there a serial protocol available for linux that allows for multiple devices to communicate over a serial interface (shared serial bus) with TCP/IP. My understanding is that PPP is meant for only two devices to communicate over serial…
michael
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4
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1 answer

Is my SIM card faulty or is my provider annoying me?

I'm trying to establish a PPP connection using pppd and AT Commands. This usually works fine with a SIM card of my local provider. However, I received a card from a friend that is living in Germany and I wanted to give it a try from Switzerland but…
morandg
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4
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1 answer

PPP connection through serial cable works on WindowsXP but doesn't work on Windows7

I have a device that establishes PPP connection (or incoming connection in terms of Windows) through null-modem cable and then communicates with PC using TCP sockets API. The problem is that all works fine on WindowsXP but does not work on…
ITaddict
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4
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3 answers

Start a remote process using java

Machine A connects to a remote machine B using sshpass and that remote machine B doesn't give ssh access to root directly so I connect to it through user and use sudo and I also have disabled password for the user when he does sudo su. When the…
Shashank Singh
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4
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2 answers

PPP protocol over serial port

Where can I find some low level information about old days PPP protocol modems, over serial line? I have a embedded WiFi SOC that I want to use from linux as a modem, so "connect" via AT commands, configure, etc, then relay all TCP packets…
yo3hcv
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4
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2 answers

Embedded Linux - Get Signal Strength of Modem While Connected

I am running a USB cell modem via PPP in Embedded Linux. I can use AT commands via minicom to connect to the modem and interrogate the signal strength (AT+CSQ) when the PPP connection is not active. However, when it's active, this is not possible.…
kittyhawk
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4
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1 answer

How to setup a Azure VPN on the client side for internet access purposes (Google behind GFW)?

I'm trying to setup a VPN for internet access purposes (I'm in china behind the the great firewall) but I'm not an networking expert. Someone out of China who has an Azure subscription created a package for allowing me to connect to that VPN with…
Natalie Perret
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2 answers

How can I communicate over a PPP connection in a C# application?

I've used a PPP connection before using pppd in linux, but now I need to communicate with hardware via a PPP connection from a C# application and I'm new to .net. Is there a way I can open a PPP connection from within the application and set the…
Ayeayeron
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