Questions tagged [ppp]

PPP (point-to-point protocol) was developed and standardized in order to carry all traffic between two network devices over a single physical connection, direct link between two nodes.

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Set up SIM7000E via PPP

I am trying to set up SIM7000E via ppp. SIM7000E is connected to a beaglebone black via micro USB cable. Beaglebone uses 5.10.168-ti-r71 kernel (Debian). SIM7000E drivers have been installed ...
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1 answer
60 views

VirtualBox - Internet with "Host-only" over PPP

I have a VM that uses Host-only Network. On the Host Machine I have a ppp0 interface through which I have access to the internet (as additional public IP-address). But if you send traffic from ppp0 to ...
4 votes
2 answers
13k views

MacBook not connecting anywhere via VPN

I was wondering if someone could help me troubleshoot this issue. I have a handful of VPNs set up on my MacBook (Snow Leopard) which I know are working, but today when I tried to use them I get the ...
11 votes
2 answers
5k views

Verizon USB551L 4G Stick on Linux

I have been trying to get a Verizon USB551L 4G USB Stick working on Debian Linux. I have been able to get it to connect, but it always disconnects after 10 secs to 2.5 minutes, then it cannot connect ...
2 votes
1 answer
1k views

Is it possible to use PPP to create a network bridge?

Is it possible to use PPP (pppd) to create a network bridge between two subnets? That is, connect two segments of the same network, tunneling Ethernet frames, rather than IP packets? As I understand,...
0 votes
2 answers
609 views

Make a http server accessible in a remote network through VPN

I have an all Linux environment. I'm connected to a remote network through a PPP VPN tunnel. My machine at home appears to be on the same network as the remote machines through the PPP interface. This ...
0 votes
0 answers
539 views

Static route + pptp VPN for communication between different networks through internet

I'm trying to configure two routers that are responsible for two different networks. I have a 4G tplink router TL MR6400 in one side, and a 4G Teltonika router RUTXR1 on the other side. I want the ...
1 vote
1 answer
695 views

pppd: short connection time

Problem Description I am using a ublox SARA-R410 modem and pppd with a Linux host over UART. I sometimes see very short connection intervals where seemingly pppd forces a reconnect without a logged ...
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517 views

How to connect to the Internet using a dial-up modem on Ubuntu

I got a dial-up ISP connection as my backup ISP. I have a Digisol modem which has a single RJ45 port which I have connected through a switch to a Ubuntu desktop. The ISP gave me a username and ...
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153 views

What Windows 10 serial framing protocol uses "CLIENT" as part of its handshake?

I need to implement IP networking over a bytestream with one end a custom microcontroller and the other end Windows or Linux, I've selected PPP for the protocol, which was straightforward to set up on ...
1 vote
1 answer
2k views

How to set priority on network interfaces on Linux

I'm working on a custom Linux OS (built with Yocto) and I have two internet sources, one is GSM and another one is Wi-Fi. GSM is handled with PPP connection (ppp0 interface) and for Wi-Fi I use ...
0 votes
1 answer
100 views

Can't access PPP equipment connected to VMWare Guest

Well, basically, what I'm trying to do is to connect an equipment that needs to talk to a Windows Host through a Linux (Lubuntu) Guest. Now a bit more of details: 1 - I have a software that only runs ...
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499 views

Raspbian - Network Manager maps modem to an ehternet and not PPP interface

I have a very interesting problem: I'm trying to achieve cellular connectivity on RPi4, with a modem (Telit LE910C4-EU). For this purpose I'm using modem manager & network manager: apt-get update ...
0 votes
1 answer
199 views

Windows 10 PPP dial-up with u-blox TOBY-L200 stopped working

I have a TOBY-L200 LTE module connected by USB to a Windows 10 machine. When I try to connect to internet over PPP, I get the message Error 734: The PPP link control protocol was terminated. This ...
0 votes
1 answer
280 views

Create a VPN to get around blocked ports

I'm working on my laptop in a library at a university, where the "free" guest wifi blocks all ports except 22, 80, 443, and some others. This prevents me from using some services like SMTP-TLS. ...
1 vote
1 answer
1k views

How to find 3G signal strength when connection is already established by pppd?

I want signal strength information when a pppd connection is already running. I am running pppd on an embedded Linux environment and a 3g modem manufactured by Cinterion. I know commands from which I ...
0 votes
1 answer
4k views

Connecting to the Internet with a 3G USB Modem

I am trying to establish a connection to the Internet with wvdial. Everything is alright but the problem is I can't ping for example google.ca or its IP address. Here is the output of the wvdial ...
1 vote
1 answer
1k views

Issues with libgcrypt when starting from a service

I'm currently working on a embedded linux distribution to get networking up and running. I need it to switch between ppp connection and wifi when it's available. I'm doing this with wpa_cli -a (active ...
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1 answer
53 views

Multiple connections automatic switching

I'm currently working on a very bare systemd based embedded OS. I have ppp and wifi as means of connecting to the internet. I need it to switch from ppp to wifi when it's available. Kind of like you ...
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0 answers
1k views

VPN l2tp over IPSec: ppp - No auth is possible. Ubuntu 18.04 LTS

I setup IPSec over VPN using this tutorial https://20notes.net/linux/setup-l2tp-over-ipsec-client-on-ubuntu-18-04-using-gnome It is working using NetworkManager. However NetworkManager allow only one ...
1 vote
2 answers
344 views

Debian modem problem

I'm a new Debian user, it looks like a very good choice 4 me, every thing is stable, free and easy to use. The problem is, I'm using my modem to establish a dial up connection to the internet (ppp) (...
2 votes
0 answers
457 views

VPN nameserver remains in resolv.conf after disconnecting

I'm using Network Manager (1.18.0-1) on the Arch Linux system where resolvconf is also present (from openresolv which is a base package netctl dependecy). When I'm connecting to the VPN server via ...
3 votes
0 answers
3k views

IPCP: timeout sending Config-Requests

We have a problem with part of our devices which are using ppp to connect to the internet using 3G modem in US. The issue seems really odd as only few of the devices have this problem but it is a ...
4 votes
2 answers
15k views

Strange default router address for interface 'ppp0'

I'm using a 3G-modem to provide an Internet connection to my Linux box. So, when I issue the ifconfig command, I see the following: ppp0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> ...
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115 views

Brige a internet connection fron one computer over a serialport to another computer

I have two computers, one connected to the internet via ethernet, and another one that I would like to get a network connection to by serial link from the first computer. Basically letting the first ...
1 vote
1 answer
921 views

Routing eth network packets over ppp connection

I have 2 machines with a ppp connection over serial between them. They are also connected to seperate LANs on their ethernet interfaces. I want to be able to have communication between these two ...
0 votes
0 answers
677 views

Many issues setting the default gateway on boot-up

I am using a BeagleBone embedded computer running Debian. I have two network interfaces : A connection to a cellular modem over USB which uses ppp and connects to the outside world. It receives a ...
0 votes
1 answer
584 views

ppp interface and an ethernet interface both not working together

I have a Rasberry Pi with two network interfaces. One is a ppp interface connecting to a cellular modem over USB. The other is a local ethernet connection with an ethernet cable connected to a ...
1 vote
1 answer
115 views

Using a cellular modem vs a cellular router to connect to the internet

I am working on a project using an embedded Rasberry Pi computer running Debian to communicate with the internet using 4G. I have used a cellular modem at first, whereby we communicate with the modem ...
0 votes
1 answer
717 views

Why my ppp modem interface doesn't show me a public IP address

I have a cellular modem from Zoomtel. I connected my BeagleBone embedded computer running Debian to it via pppd. When I run ifconfig , I see the interface ppp0. However this gets a local IP address ...
0 votes
1 answer
635 views

PPP connection to a virtualbox guest

For testing some software, I'm trying to set up a PPP connection between an Ubuntu 18.04 host and an Ubuntu 16.04 guest running in VirtualBox. So far I've tried: Creating virtual serial devices on ...
2 votes
1 answer
1k views

PPP(Cellular) Bonding

I am trying to transfer data over multiple connections. My system info: Ubuntu 16.04 LTS 2x 100Mbps ETH 3x LTE Cellular Modem (Mobile Broadband) connected over USB I want to use the network ...
4 votes
1 answer
1k views

PPP - PPTP VPN drops connection with weird debug message

I'm trying to establish a link between a Win2008R2 PPTP Server and a Debian 8 client using PPP. When connecting to the VPN server, authentication succeeds. After authentication it's negotiating the ...
0 votes
1 answer
322 views

Can not connect to Raspberry Pi from internet

I am trying to use RPi to forward traffic to my home webserver. That is, a remote user should connect to the webserver through internet from anywhere. The setup is as follows: the RPi gets the ...
1 vote
0 answers
362 views

On a home DSL line, why would PING fail, but LCP echo work fine?

Odd network issue - I have a VDSL (fibre-to-the-cabinet) line to home. My router connects via PPPoE to my ISP, and the ISP then sends regular LCP echo packets to monitor the connection and show ...
2 votes
0 answers
389 views

How do I make ppp reliable over lossy radio modems using pppd and tcp kernel settings on debian? [closed]

I am having a lot of trouble establishing a reliable ppp / tcpip link between two debian systems over radio modems. My hardware topology is a little complex. The system uses: Raspberry Pi 3B at ...
0 votes
1 answer
1k views

Cisco: unable to negotiate IP using IPCP with Windows server

I am connecting to Windows server using PPP (for vpn), I establish connection but server does not respond me for my address requests: *Mar 23 00:40:06.055: Vi1 MS-CHAP-V2: I CHALLENGE id 0 len 25 ...
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0 answers
5k views

Windows 8 VPN disconnects after 10 minutes with Error 829 (ERROR LINK FAILURE)

My windows VPN (PPTP protocol) simply disconnects if inactive for 10 MINUTES (on the spot!). Used this for years on the same computer / system. Changed MODEM/ROUTER recently (2 months ago) but can't ...
3 votes
0 answers
211 views

pppd loses ADSL IPv6 connection after 30 minutes

I run a modem in bridge mode and use pppd to open the connection. While the IPv4 connection is stable, the IPv6 connection seems to die exactly 30 minutes after opening it. ping6 starts returning ...
2 votes
0 answers
2k views

PPP: Modem hangup on IPCP negotiation

First of all, sorry for the question if it is obvious, I'm not very good at network configuration. I'm currently trying to connect a Linux machine with Busybox through a modem to a cellular network (...
3 votes
2 answers
20k views

wvdial, ppp0 and setting default route (automatically)

I am setting up a 3G connection to be monitored by supervisord using wvdial on a headless machine (raspberryPi/raspbian) which I can only access via the 3G connection once it's live. In short, ...
13 votes
1 answer
35k views

How to interpret the output of ipconfig/all?

I am shaky on network setting up concepts. When I do ipconfig/all on my machine, I get: I need to set up a basic home network and want to understand these basic things and what is going on. I want ...
2 votes
2 answers
4k views

What happens to the router's MAC address once the packet is forwarded into the Web?

What happens with link layer LAN Ethernet header data once the once the frame reaches the main home router and is forwarded to the first network core router? Routers are network layer devices and ...
1 vote
1 answer
1k views

Where to ppp username and password to initiate a PPP session?

I am using RedHat Linux 5.4 and I would like know where should I update the PPP username and password sothat I can connect to the ISP?
3 votes
1 answer
13k views

Configuring a PPP device with NetworkManager nmcli

I have the ppp and network-manager packages installed on my Debian-based BeagleBone and I'm trying to reliably connect it to a GPRS modem over serial. I'm using an Adafruit FONA which works like a ...
0 votes
1 answer
2k views

Fixed ppp interface name?

I have many pptp vpn tunnels or servers to connect to and linux would assign ppp0 for the 1st connection, ppp1 for 2nd connection and so on. I need the interfaces to be fixed so i can forward the ...
0 votes
1 answer
4k views

setup L2TP on Ubuntu 10.10

I'm following this guide to setup a VPS on my Ubuntu VPS: http://riobard.com/blog/2010-04-30-l2tp-over-ipsec-ubuntu/ My config files are setup as in that guide, openswan version is 2.6.26 I think.. ...
0 votes
1 answer
924 views

PPTPD on CentOS: no connection

I have installed PPTPD on my CentOS server and try to connect to it from my Mac and my Android smartphone. Both failed. This is the log on my Mac (from ppp client): Mon Jun 22 22:11:58 2015 : ...
1 vote
0 answers
1k views

itshidden.com VPN connection dies and will not reconnect on Ubuntu Server 10.04

I have a ubuntu server which should keep a connection to itshidden.com VPN through PPTP. Somehow, connection dies once in awhile and following lines appear in /var/log/syslog: Jun 24 16:52:54 gbox-...
1 vote
1 answer
9k views

Linux PPPD connection terminated -> LCP terminated by peer (User request)

I'm trying to establish a GPRS PPP connection (to Rogers Wireless data network in Canada) using the Telit HE910 modem, but it appears that something is going wrong during DNS negotiation: Serial ...