Layer 2 Tunnelling Protocol is a layer 7 networking protocol which provides an unsecure layer 2 tunnel. It runs on top of UDP, and is commonly used to carry PPP sessions. Security is usually provided with the addition of IPsec.
Questions tagged [l2tp]
202 questions
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L2TP/IPsec through HTTP Port 80
i got an VPN (L2TP/IPsec) Tunnel running on my synology nas. my router is configured for vpn passthrough. so everything is fine. furthermore i got an webservice running on port 80.
now i got the problem, that i spend most of my time in an…

Alex Tape
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openswan and xl2tpd tunnel not working?
Since weeks i want to setup l2tp tunnel with xl2tpd and openswan in debian wheezy, the external interface is ppp0 with dynamic ip and the internal interface is eth0 with ip address 192.168.1.1.
l2tp server give me the user_id, password and the…

shams
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L2TP over IPSec VPN (OpenSwan, CentOS 6) unable to connect via iPhone (iOS 5.1) and Android (JellyBean)
I have successfully installed L2TP over IPsec VPN (PSK) using OpenSwan 2.6.38 running on CentOS.
Connect DOES WORK perfectly from Windows 8.
But doesn't work AT ALL from iPhone 4 (ios 5.1) or Android 4.1 - fails with errors "VPN server doesn't…

Neolo
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L2TP server - site-to-site vpn connection
I am not sure this is the right place for this question but here goes.
We want to connect users using an L2TP VPN connection to a users at the other end of a SonicWall site-to-site VPN.
Currently we have a SonicWall firewall/router contraption in…

Pyro
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3 answers
PFsense VPN all types failing?
I am trying to configure a new PFsense router (64 bit) and am trying to to get the VPN functions working.
I have enabled PPTP, L2TP and IPSec. I've added allow all rules to all LAN's, WAN's and each of the VPN types while I test it.
L2TP Raw Logs
…

dannymcc
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Server doesn't accept L2TP connections although it is configured to
I own a Windows Server 2003 VPN server which my clients connect to for accessing the local network..
I have configures the RRAS to use the RADIUS authentication and accept connections.
The PPTP protocol works great and does all that is expected.…

Miro Markaravanes
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1 answer
Packet flooding while configuring a Debian L2TP/IPSec client?
I'm currently at my wits end trying to configure an L2TP over IPSec VPN connection on my Debian using openswan and xl2tp box connecting to a server of unknown configuration.
I've managed to successfully establish the connection and everything…

Joseph B.
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Debian squeeze as L2TP/IPSec gateway for Android devices
I'm trying to configure Debian squeeze as L2TP/IPSec VPN for Android devices, but with no great success.
So far I have done following:
Successfully configured Debian with openswan implementation of IPSec.
I could connect from devices with Android…

user71061
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Pfsense IPsec VPN not listening on port 500?
I am trying to setup a home VPN with IPsec as I have read about PPTP having some security problems and being outdated. I found an article on the web that shows you how to setup an IPsec VPN here which I was able to follow and setup, but when I went…

user99545
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L2TP and multiple interfaces on the machine
We have setup ipsec and l2tp on linux. One question came up (due to firewall management policy) is whether it's possible to have 1 virtual interface instead of one per connected client.
Now we have:
ppp0 serverip clientip1
ppp1 serverip …

Alex
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2 answers
L2TP VPN routing issue with iphone/ipad
I am able to connect to our company's VPN with L2TP on the iphone and ipad, however, I can only get to certain resources in our company network but not others.
After looking at the iOS device logs and routing tables, it seems that only the first 30…

Banjer
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2 answers
Error connecting to Sonicwall L2TP VPN from iPad/iPhone
A client has a Sonicwall Pro 2040 running SonicOS 3.0, and they'd like to be able to use the L2TP VPN client from their iPads to connect to internal services (Citrix, etc). I've enabled the L2TP VPN server on the Sonicwall, made sure to set AES-128…

db2
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Is there any L2TP client without IPsec?
I want to use L2TP to through NAT, but i do not need IPsec, because IPsec waste much CPU. I can setup one L2TP server on linux, so is there any L2TP windows client without IPsec ?

larry
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how i can use windows vpn connection file in ubuntu?
i have a windows vpn. how i can use this vpn in Ubuntu 10.04. i don't what's this vpn gateway or other configuration items.
my VPN file content is:
[usa]
…

Chalist
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Ubuntu Server 20.04 network-manager not starting VPN automatically
I am getting desperate here. I need to connect a Ubuntu Server Machine on a VPS to a network to monitor several machines. I can only connect to the network with L2TP over IPsec.
I have tried installing the GUI on the Ubuntu Server, changing Netplan…

Javi Hache
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