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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PPP null modem Raspberry Pi to Windows 10

I have successfully setup a PPP connection between a Raspberry Pi 3B (Raspbian Buster) and Ubuntu (20.03.2 LTS). I would like to do the same between Raspberry PI and Windows 10. The serial connection ...
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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 ...
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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 ...
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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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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 ...
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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 ...
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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. ...
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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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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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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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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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883 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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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2 votes
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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,...
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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 ...
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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 (...
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2 votes
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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 ...
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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 ...
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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 ...
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3 votes
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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, ...
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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 : ...
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How to preserve L2 headers while sending Ethernet frames over serial line

I am using pppd (in linux) to send ethernet data over a serial line to another computer. How can I preserve L2 headers while sending Ethernet frames over serial line? It seems the ppp protocol sends ...
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1 vote
2 answers
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PPP hangs up after authentication

I am working on an Ubuntu 12.04 machine and could use some assistance to establish a ppp connection with my ISP via a Telit HE910 mPCIe module. ppp config: # pppd launch configuration used by pon(1) ...
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Unable to receive UDP broadcast packets on PPP connection

I am struggling for two days now with no success. I have two modems (do not ask, some special stuff), that uses dial up (PPP) connection. I tried this on windows XP and it works like a charm. I am ...
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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 ...
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1 vote
1 answer
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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 ...
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Custom PPP chat script on pfsense

Hi have a Dell 3G modem installed on my Alix-6f based pfsense router / firewall. In order to connect to the Internet (Telstra) I perform the following in the console : ppp (enters the ppp interactive ...
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Logging VPN Traffic (L2TP/IPSec on Ubuntu)

I'm running a small, private VPN server for me and 2-3 other people. For bandwidth monitoring, and to comply with any possible DMCA or other government (re: new Canadian law) requests, I want to have ...
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How to do port forwarding/redirecting on Debian?

I have two questions. Question 1: My debian machine has interface eth3 with ip 192.168.57.28. If someone tries to connect to 192.168.57.28:1234 how do I redirect the request to another machine: 192....
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3 votes
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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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Why is there a remaining PPP adapter after removing Routing and Remote Access

I have removed Routing and Remote Access off of one of our servers. It is a Windows Server 2008. After removing the role, I am still showing a PPP adapter, and people can still VPN into the server. ...
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Is a FreeBSD equivalent of pppd required? If yes, is it /usr/sbin/ppp?

On the Wikipedia page and the official webpage, only Linux and Solaris are listed as possible platforms. The FreeBSD handbook mentions pppd, but it is used to refer to the kernel implementation in ...
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PPP Link Protocol was terminated, Windows 7

I am trying to set up a dial up connection through a Windows 7 server to Windows XP server and keep receiving the above error. I have confirmed the username and password are correct and have tried ...
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What is a PPP Adapter? [closed]

What is a PPP adapter, I have learned that It helps in connecting LANs to WANs. How does it help in normal pc? I have got two interface IPs for my pc when I typed the command ipconfig /all. One is for ...
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9 votes
2 answers
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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 ...
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1 vote
1 answer
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What is the p-t-p (or remote IP) address in PPPoE connections?

In Linux when I connect to PPPoE via the pon command, the plog command shows two IP addresses: local IP address (which is my internet public IP) remote IP address (which I don't know what is it?) ...
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Why is PPPoE used for DSL rather than EAPoL?

While learning for my IT Security exam I wonder why PPPoE is used for establishing DSL connections instead of EAPoL? In PPPoE, the authentication is embedded in PPP frames, which are embedded in ...
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