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Questions tagged [point-to-point-protocol]

Point-to-Point Protocol

The Point-to-Point Protocol is a link-layer protocol for networking between two network nodes.

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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: 192.168.57.25:80? Question 2: If my debian machine has…
Dánjal Salberg Adlersson
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pptp (pon) fails when called via cron (debian)

I have a pptp VPN link dialing from my (debian) linux server here, to an ISA2003 server at a remote site. The internet connection at (both) ends is somewhat dodgy, so I have written a little script to call pon myvpnlink if it detects the link has…
BuildTheRobots
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pppd terminated bya SIGTERM in Centos 7 -- who's sending it?

Folks, I created a script to keep a persistent "emergency" connection with a 3G modem, so I can access my CentOS 7 makeshift server remotely if the usual network fails. Everything works for a few seconds, but then somebody kills pppd with a…
Not your workmate
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Permissions to Ping over an interface

My server is running CentOS 6. I have a Sprint Broadband device connected as ppp0. This connection has a tendency to need restarted, so I'm trying to monitor it with Nagios (this is used for other monitoring of my network already). I have a…
dw.emplod
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nftable rules get invalidated on reconnect (VDSL, ppp0)

I'm rebuilding my router using nftables on debian jessie. I have a working setup up to the moment where my ISP decides to reassign a new WAN IP by reconnecting my DSL-link. After such a reconnect the router itself has an online connection, but…
Kai Giebeler
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What is "the meaning" of this `ip route`?

I'm slowly learning more about IP routing and the ip toolset by investigating a VPN. After I start a particular VPN client, one of the (new) routes displayed by ip route show is 128.0.0.0/1 via 10.144.1.8 dev ppp0 proto none metric 1 I'd like to…
TomRoche
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pppd "peer refused to authenticate"

I have a working pptpd+pppd server configured which currently has two Windows 7 clients successfully connecting. However, when I try to connect a linux client I'm getting a really weird exchange that ends with "peer refused to authenticate" on both…
Moshev
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xl2tpd: Provide L2TP/IPsec VPN connectivity to an entire subnet without using a default route

I've set up an L2TP/IPsec VPN using OpenSwan and xl2tpd using the "nodefaultroute" ppp option. The server's virtual IP address is set to 10.10.31.1 and it allocates addresses in the range 10.10.31.2-254. This sets up PPP links between 10.10.31.1 <->…
Tom K
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How to find DNS servers for each PPP session in linux?

How to get the DNS server address which are specific to each ppp session. For example, I have two ppp sessions each one connected different service provider, how do I find out the DNS server IP address which are assigned by each service provider?…
Ravi
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Find out why Linux chat script for ppp connection fails

I'm having trouble making a ppp connection over a GSM Modem. The Platform is an ARM based embedded device, running Debian Linux 5. The scripts worked before with this device, but not with the new shipment. I just can't get enough information out of…
Benjamin Maurer
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Reasonably Secure Alternative to Poptop PPTP Server for Ubuntu server and Windows clients?

I have a poptp server running on a old Fedora server but I'm upgrading to an Ubuntu 10.04 server. I was wondering if there are any good, reasonable secure alternatives to poptop that in can install on our new Ubuntu server as a way to get VPN access…
wag2639
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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 initializing the chat using minicom for now and not…
Smokie
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how to use ssh over serial without using pppd? ( Or how to transfer TCP over serial without using pppd)

There are many virtual machine based on QEMU in my server. Some of them are forbbiden to use networking, and only way to attach them is via virtual serial port. Due to serial console's bad features (such as working badly with tmux and vim), I want…
Komeiji Kuroko
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How to compare 2 TCP/IP stacks or implementations?

I have to recycle an old machine into a networking node for managing TCP/IP connections and PPP protocols ( basically a DSL connection ); I'm not asking for something more than this, all the tasks required are network-related tasks, no computing,…
user2485710
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Macvlan-interface and PPP-session

I need to pick up two PPP-sessions on the same interface with different MAC-addresses (on some device with openWrt). I decided to check macvlans. I created an interface with another MAC-address. ip link add link eth0 address 00:cc:cc:cc:11:33…
someuser
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