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Questions tagged [ppp]

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

146 questions
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pppd stuck in dialing process

i'm connecting several usb modems to my Ubuntu: uname -a Linux devlp 2.6.32-28-generic #55-Ubuntu SMP Mon Jan 10 21:21:01 UTC 2011 i686 GNU/Linux pppd version: 2.4.5 i'm doing a test with 8 sierra wireless modems, and all of them are connected and…
RoeeK
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My systemd unit file and bash scripts not working for interface ppp0 checks

Trying to understand systemd and craft a service that works , using two bash scripts I have to down/up an IPsec/L2tpd tunnel. All works fine if I use the bash scripts commands from the command line, but for some reason I'm getting race conditions or…
keratos
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Could not link driver rlm_sql_mysql

I have a problem with MySQL: freeradius -X gives the following command: Could not link driver rlm_sql_mysql: /usr/lib/freeradius/rlm_sql_mysql.so: cannot open shared object file: No such file or directory Make sure it (and all its dependent…
Krisz
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How to use another machine within Azure P2S VPN as a gateway?

I have configured Azure P2S IKEv2 VPN and downloaded the VPN client (in machine it shows as PPP adapter) into 2 machines, one each in different countries. Say our IP addresses are 170.10.10.121 & 170.10.10.122 . From here on we'll call the site with…
Neo
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PPP and ethernet interface not working at the same time

My device is running on Debian OS strech version (not desktop). I am not an IT personal, but a programmer. I need to know how to configure the network on the debian so both PPP cellular modem & the ethernet interface can access the internet. There…
user1528794
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Sierra Wireless AirPrime Issue

Facing a bit of issue with Sierra Wireless AirPrime EM7430. It's added in device which has internal sim slot and USB ports as well. The device has Ubuntu 14.04 OS server and we SSH to it. Now, for the USB port, I can connect modem ( using…
priths14
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Why does PPP over Serial not answer to ping request?

I use GSM module Telit GL865 in UART communication with STM32F7 MCU and softwares STM32CubeMX, Keil. When I send AT commands over UART to GSM module as below, I get an IP address by the internal stack of the GSM module and ping it…
Sarp Engin Daltaban
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What is the difference between LwIP PPPoS libraries? Which one should I use, that the STM32CubeMX gives or that the examples based on?

When I use STM32CubeMX, it gives me sources as follows: https://github.com/tabascoeye/lwip/blob/master/src/netif/ppp/pppos.c with functions pppos_create(..), pppos_input(..), ppp_connect(..) When I look at the examples like created 1 year ago, it…
Sarp Engin Daltaban
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Why LCP negotiation over PPPoS session doesn't start via LWIP, between STM32F7 and Telit GL865 GSM Modem?

I am using Telit GL865 GSM Modem with STM32F7 nucleo development board. I make them communicate via USART1. Firstly, I configure the modem with AT commands as below; after that, modem starts to send LCP packages and since I cannot handle them, NO…
Sarp Engin Daltaban
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Static IP for Telit GL865 GSM module via LWiP PPPoS by using STM32F7

I am using STM32F7 with development board Nucleo-F746ZG. I have activated UART, LWIP middleware and its PPPoS support. I can make STM32F7 communicate with Telit GL865 GSM modem by using AT commands over UART, (i.e) make the modem establish static IP…
Sarp Engin Daltaban
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Telit UL865 3G Modem ATD*99***1# Command “NO CARRIER” Response

Currently, I am working on Telit UL865-EUD 3G Modem. I worked with Telit GL865 GPRS modem before that's why I am familiar with AT commands and initialization logic. My problem is that my UL865 modem always returns "NO CARRIER" to ATD*99***1#…
dredg
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Calculating the PPP Frame Check Sequence

I'm attempting to generate a valid PPP Frame Check Sequence (FCS) using C#. The code I have implemented is based off of this answer. public static class Crc16 { const ushort polynomial = 0x8408; static readonly ushort[] fcstab = new…
Brett Wertz
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How do I create an FCS for PPP packets?

I am trying to create a software simulation on an Ubuntu GNU/Linux machine which will work like PPPoE. I would like this simulator to take outgoing packets, strip off the ethernet header, insert the PPP flags (7E, FF, 03, 00, and 21) and place the…
J Sin
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Point to Point Protocol

I have recently been working on Point to Point Protocol. My understanding is that it is a peer to peer link layer protocol which provides packet data connection over unconventional physical medium. So on both the peers the PPP runs at the link…
Harsha
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script file referenced in PBK file fails to connect and crashes settings

I have legacy code from Windows 95 that is still being worked on and sold. It creates RAS dial-up entries that reference a script (*.scp) file in the DEVICE=switch section of the PBK file. The entry is created using RASSetEntryPropertiesA() in…
Gregor Brandt
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