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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pppd Could not determine local IP address

I am trying to create a pppd connection on Angstronm embedded system with telit HE910-D. I am using pppd version 2.4.3. After PAP authentication succeeded there are a bunch for Naks and Rejections. I ...
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How to keep ppp up and running

I'm using a USB Cell Modem on a Arm SBC running Debian Jesse. I have a wvdial.conf file and a ppp0 file in my /etc/network/interfaces.d directory: auto ppp0 iface ppp0 inet wvdial It mostly Just ...
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60 views

Force Wireshark to decode part of Data as another protocol

I have some traffic samples where the Layer 2 is PPP and the next protocol field value is 0x0281, which indicates MPLS Unicast. There are 4 bytes following this PPP header before I see the IP header. ...
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60 views

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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243 views

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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362 views

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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232 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 ...
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1k views

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

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

Networking from a tun6to4 to pppX interfaces on debian

So my /etc/network/interfaces looks like auto eth0 iface eth0 inet static address 198.51.100.50 netmask 255.255.255.0 gateway 198.51.100.1 # VPN Subnet auto eth0:1 iface eth0:1 inet static ...
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367 views

Unable to Connect to VPN with PPTP on OSX 10.9

I'm attempting to connect to a VPN on my MacBook Pro running OSX 10.9 Here are the connection settings: Interface: VPN VPN Type: PPTP Authentication Settings: Password Configure IPv4: Using PPP ...
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248 views

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 ...
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107 views

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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1k views

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: ...
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1answer
610 views

ppp0 strange default router address

I'm using 3G-modem to provide an Internet connection to my Linux box. So, when I issue ifconfig command, I see the following: ppp0: flags=4305<UP,POINTOPOINT,RUNNING,NOARP,MULTICAST> mtu 1500 ...
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1answer
300 views

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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2answers
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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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1k views

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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2k 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 ...
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1k views

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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255 views

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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1k views

Communication between two systems using pppd

I have two Vritual Machines (part of a bridged network) (both Ubuntu 64-bit) running Oracle VM Box. I can communicate between the two machines using netcat.I have installed ppp daemon on both the ...
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997 views

Is it possible to change the physical address of a WAN (PPP/SLIP) Interface of a dial up connection

I am using dial up connection to connect to the internet. It shows an physical address for that connection. My OS is Windows XP. I can change the physical address of a Local area connection and ...
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1answer
469 views

How to connect via specific network interface?

I'm trying to connect a Raspberry Pi to the Internet via a 3G modem. I'm ssh'ing into it via ethernet (eth0), I have the 3G connection up and running (ppp0). How can I connect to all external ...
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536 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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561 views

Making PPTP VPN Secure

I've been reading about the security, or lack of, with regards to a PPTP VPN. The specific things mentioned over and over are the fact that DNS can leak and the encryption is insecure. Is this a ...
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275 views

Linux PPP Routing issue [ Network Unreachable ]

Well I set up a ppp connection for my USB modem. I even got an IP address but when I try to do a ping I get network unreachable. I think it could be because the same laptop also sometimes get ...
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894 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 ...
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153 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?
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6k views

How can I use my cell phone to establish a dial-up networking connection?

I am using Windows 7 and have a BlackBerry with T-Mobile (U.S.). I have paired the phone with my computer over Bluetooth, which automatically creates a serial port for it. I am able to open the port ...
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94 views

creating RS-232 connections over RAS with a null modem connection [duplicate]

Possible Duplicate: Using RS-232 connections over RAS with a null modem connection I have a requirement where in I have to establish a null modem communication using RAS api for PPP (in ...
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606 views

Clash between PPP connections on Windows 7

I am using COM ports to connect to some hardware. I setup RAS connections for the various COM ports. If I connect to one device at a time then I am able to communicate using a TCP/IP socket with ...
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1answer
521 views

pppd config , how to bring up eth0 automatically?

How can i allow ppp daemon bring up eth0 first before connection ? If the ethernet port is down , no connection would be success. So i'm putting this into /etc/ppp/peers/dsl , but eth0 won't be ...
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pfSense 2.0 - Can PPP L2TP be used to be an L2TP tunnel?

i noticed in pfSense 2.0 (RC3) that my PPPoE interface is now a PPPoE tunnel assigned to my WAN NIC (Network Interface Card): where the PPPOE0(xl0) - ianboyd@superuser.com network port is defined ...
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1answer
6k 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 ...
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1answer
673 views

how to get ppp interface gateway address in debain 6?

I am using debain 6 and using a Sierra modem c888 to connect internet. I am using wvdial package for connecting the modem. I am able to connect internet. The question I have is, how do get the gateway ...
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3k views

PPTP: Use LDAP or PAM as authentication backend

I'm using pptpd and pppd on a Debian linux host to provide VPN capabilities to mobile phones. I would like to use my OpenLDAP server for authentication and authorization purposes (instead of keeping ...
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247 views

Remote Desktop/access from a ppp connection

I have setup a ppp connection through a serial port between two computers with a null modem using these instructions. My Question is how would I remote desktop or access the host computer via the ppp ...
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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.. ...
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292 views

Ethernet and PPPoE conflict with each other

I have an old computer in my dorm room. It acts as a gateway and traffic-shaper (htb) for me and my roommates. Debian is installed into it. It has been working quite good for a year. Nothing ...
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1k views

Why is byte stuffing preferred to use with PPP?

I read that PPP can use both bit and byte stuffing, but I can't think of any reason why byte stuffing is preffered. Can you?
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please explain the difference between two way hand shake and three way for PAP and CHAP

well the difference i general specifically for -two way - PAP -three way - CHAP and what has it got to do with how the connection terminates
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1k views

Run scripts after establishing PPPoE connection in Ubuntu

I need to change some configuration after a PPPoE connection has been established. (Change /etc/resolv.conf, add routes.) I made a script, moved it to the /etc/ppp/ip-up.d/ and made it executable, ...
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1answer
1k views

Orange UK Internet Everywhere (Huawei E1752) using Linux/PPPd

I have been trying to get an Orange UK 3G dongle to work with Slackware 13.1 (ships with what is allegedly pppd v2.4.5). It seems to successfully authenticate with CHAP (not that the ISP seems to ...
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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 ...
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570 views

PPP connection between PalmOS and Ubuntu (over ttyUSB0?) without crashy “visor” kernel module

I have a Palm Treo 680 which I'd like to use as a media remote, using Palm MPC. Almost the exact instructions on that page used to work perfectly for establishing a PPP connection over the USB cable; ...
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8k views

Mac OS X L2TP VPN won't connect

I'm running Mac OS X Server 10.6, providing an L2TP VPN service. The VPN works just fine when connecting from all computers except one --- this one computer stays at the "Connecting..." stage for a ...
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1answer
3k views

pppd disconnects from 3G, doesn't reconnect, w/ persist set

I am trying to configure pppd to connect to a 3G network (Sprint, in this case) and then stay connected, reconnecting automatically if the remote connection is terminated. I have enabled the persist ...
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1answer
3k 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 ...
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61 views

Error handling pppd configuration?

I have a computer, running ubuntu, that I want to be connected to the network at all times. It has a GSM modem connected to it via USB. Is there some program available that monitors that the ...