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.

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Using Ubuntu Karmic as an L2TP Client for VPN

I'm trying to connect to a VPN service over L2TP using Karmic as a client and it's not working. The only details I have are the remote IP address, username & password, and a shared secret string; ...
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2answers
256 views

Unable to connect from Windows to VPN while Android and iPad can

I've got a L2TP/IPSec VPN set up on CentOS (Amazon AMI) with racoon, ipsec-tools and xl2tp. I'm using a version of racoon from this repo, as it allows the use of IPSec ID wildcards (or no ...
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2answers
265 views

Can I host a VPN service on a shared Windows Host I already have?

I have a windows hosting plan with Plesk control panel, FTP, email and other popular options already found in common windows hosting plans. I want to know whether I can convert my hosting plan to a ...
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1answer
3k views

L2TP/IPSec from Windows 7 to ASA 5520

I am trying to setup L2TP/IPSec on our ASA5520 to support a fringe case for one of our developers. The Windows VPN subsystem apparently stores the kerberos or NTLM cookie for the login when you use ...
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1answer
444 views

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 ...
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1answer
235 views

cisco ASA 5505 l2tp vpn

I have a problem with cisco asa 5505 vpn configuration. I set l2tp for windows clients. I can connect to vpn but: when i have "use default gateway on remote network" on NIC enabled i have access to ...
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1answer
499 views

l2tp/pptp + freeradius (accounting information only gets updated on disconnect)

I have a basic PPTP/L2TP setup that uses a remote freeradius server with mysql. Issue is that when a user gets connected to the vpn and as long as the user stays connected (could be hours), no ...
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1answer
802 views

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 ...
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1answer
163 views

How to deny connections to xl2tp without ipsec encryption?

I try to setup l2tp+ipsec server for my mobile use and my home router use. So I made some setup and checked it works fine from android device. I see encryption on ipsec --status. My system is CentOS ...
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1answer
485 views

Can't connect VPN tunnel when other on same NAT-router is connected

We have recently changed our FW to a ZyWall 310 with drastically improved throughput over the old one. However there is a new problem that occurred, we have several L2TP/IPSec clients that connect to ...
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1answer
1k views

How can I configure IPSec on Windows 2012 R2 to use Pre Shared Key compatible with Android phones?

Our company has to comply with the mandate that all mobile phones use L2TP or IPSec VPNs when using untrusted Wifi or GPRS connections... namely to protect from MITM attacks. Were also interested in ...
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1answer
314 views

L2TP VPN Connection on Debian Squeeze

I need to make an L2TP VPN connection from a Debian Squeeze server. What I have is: The server IP address Shared Key My username and password Just using these 3 parameteres I can establish the ...
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1answer
318 views

WIndows 8.1 VPn stops working

I am having a problem that every day i have to re-install my cisco VPN client because it will not work. I can connect and the routes get published to by computer, but i can not ping anything on the ...
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1answer
3k views

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 ...
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1answer
471 views

Traffic shaping L2TP/IPsec VPN (via accounts not connection)

I need to be able to control the amount of bandwidth a specific user account can use on a VPN connection. One account I want to be able to use the VPN with no restrictions and another account I want ...
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1answer
367 views

How to setup VPN Client in Microsoft 08 R2

Our third party IT provider left us. We need to get a VPN connection setup with a client as soon as possible. I am mostly a software guy and networking is beyond my scope. We have been provided the ...
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1answer
212 views

redhat5 and l2tp client

Hi i am trying to setup a VPN connection with my redhat 5 machine the VPN server I am using suggested that l2tp will work much better then my current pptp setup (which does not really usable) any ...
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0answers
28 views

VPN for Video stream

I work at a digital TV broadcast company (cable), we have 2 head ends, one in the US and one in the Caribbean, we currently connect both sites with a cisco L2TPv3 pseudowire VPN between both sites, ...
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0answers
331 views

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 ...
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0answers
2k views

setup Zyxel USG 20W as L2TP VPN Server

I have a Zywall USG 20W (wireless disabled) behind a router supplied by my ISP. All ports (both TCP and UDP) on the ISP router are forwarded to the 20W. I'm trying to configure an L2TP VPN to be used ...
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0answers
3k views

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 ...
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65 views

Encrypted layer 2 tunnel over Internet for a contiguous subnet

I have two offices that are connected at layer 2 with fiber on a primary link with contiguous subnets on each end(it won't change anytime soon). It works just fine, I have full end-to-end layer 2 ...
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29 views

L2TP loadbalancing

Due to need to scale, I'm setting a new l2tp server using l2tpns and trying to balance the load between my two l2tp servers using LVS LVS configuration ipvsadm -A -u 192.168.10.10:1701 -s sh ipvsadm ...
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485 views

Android devices fail to connect to MS L2TP PSK

I have configured MS Server 2003 RRAS with IPSec / L2TP using PSK. iPhone devices connect fine however Android devices fail to connect. The MS "Oakley" trace file shows the negotiations for Apple and ...
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170 views

Multiple Devices connecting to VPN on CentOS server

I am looking for a solution as to what would be the VPN software for multiple OSes and Devices. I currently have 15 systems to connect to a VPN. I was using Hamachi from LogMeIn but their lack of ...
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0answers
949 views

iPad/iPhone L2TP VPN locks up SonicWall NSA2400 Randomly

Ok so I've got iPad/iPhone's connecting to my network via L2TP VPN setup interfacing with a Sonicwall NSA 2400 gateway. The problem is that sometimes when the iPad/iPhone is connected over the VPN ...
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0answers
19 views

L2TP daemon server multiple IP

I have VPS with 3 public IP - Debian 7. I would like to have 3 L2TP damemons (one ip each) NATing traffic to each ip. Something like this l2tp_multiple_public_ip_diagram. I have set up l2tp daemon for ...
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0answers
39 views

Tunneling a PPTP VPN connection through a L2TP VPN connection

My company recently moved to a serviced office space : they provide the desks, power and internet. My company has a VPN to connect to the main head quarters that uses PPTP to connect. In the new ...
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0answers
69 views

MikroTik L2TP\IPsec along with IPsec tunnels

How to configure L2TP\IPsec whit IPsec working along? I have looked many tutorials, but none of them was explaining how to setup L2TP\IPsec while IPsec tunnels are running. L2TP\IPsec VPN will be used ...
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160 views

Cannot estabilish connection via VPN/L2TP to server

Hello system administrators! I would like to ask you a question, because I was looking at various internet tutorials for this, and nothing worked, so... I can't connect to server via VPN, it looks ...
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0answers
1k views

Mikrotik IPSec Tunnels not working after RouterOS upgrade

We upgraded our RB1100AH2x yesterday from 6.19 to 6.22 and lost our L2TP / IPSec tunnels in the process. The logs are now littered with IPSec errors stating failed to pre-process ph2 packet. In ...
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0answers
271 views

How to debug IPsec L2TP authentication failure (Ubuntu StrongSwan client to Windows Server 2012)

I'm trying to connect via IPsec L2TP to a Windows Server 2012 server. Both the clients and the host are behind a NAT. I can connect from a Windows 7 machine without any problems, but when trying to ...
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0answers
438 views

Cannot connect to my L2TP IPSec VPN

I am trying to get my VPN (L2TP IPSec PSK) to work. I have a Synology NAS where I have setup everything as it says on the Synology support page. In my Asus RT-N66U router I have opened UDP ports ...
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128 views

Sonicwall L2TP Server is using a “phantom” internal DHCP server

Following a few articles on options 121 and 249, I'd like to push out routes to the L2TP VPN clients using the internal DHCP server on the Sonicwall. However, the Sonicwall seems to be using a ...
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0answers
52 views

L2TP Client Routing

I've setup a VPN Terminator in our DMZ using Windows 2012 R2. It is multi-homed with 2 interfaces: 1 to the DMZ for incoming connections from VPN clients, 1 to our LAN for the tunnelled traffic from ...
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0answers
496 views

Multiple Windows clients behind a same NAT gateway cannot connect to L2TP/IPsec VPN server at the same time

I have set up a L2TP/IPsec VPN server on a cloud VM (with a public IP address) running CentOS 6.5 (kernel: 2.6.32) with openswan/xl2tpd (openswan: 2.6.37, xl2tpd: 1.3.6). However, if multiple Windows ...
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176 views

L2TP within local network not working

i can't connect to my vpn server when i'm in the same network and use the external ip address to connect. It seems like the server doesn't receive any traffic. When i'm outside the network OR use the ...
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0answers
251 views

Openswan sessions hanging with multi user VPN configuration (ipsec/l2tpd)

I've got a linux box running openswan and xl2tpd. It's a simple configuration with multiple users connecting using a sharedKey, and then establishing an L2TP connection with PPPD providing the ...
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0answers
718 views

Is it possible to configure L2TP IPSec connection on a Fortigate 30D?

We've got a FortiGate-30D running v5.0,build4225,130521 (GA). I've managed to configure Cisco IPsec VPN and Web-SSL, and tested both, but I'm unable to configure the L2TP IPSec VPN. Looking at the ...
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0answers
523 views

Site to site IPSec VPN between Server 2012 and USG 50

I am looking to setup an IPSec VPN server in our organisation using a Windows server 2012 machine with remote access and routing installed. I would then like to perform a site to site IPSec VPN ...
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182 views

OS X Server ignoring static VPN IP request

I've just enabled the VPN service on OS X Server, everything is working fine however we are facing one issue. All of our clients (about 30 iMac's) are connecting to the VPN with a static IP however OS ...
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0answers
570 views

l2tp vpn is disconnected after few minutes

I installed IPSec/L2TP on my vps server. I tried to connect from my mac to this VPN server. First time, connection is succeeded. But after a few minutes, connection was broken by itself. After ...
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0answers
170 views

L2TP connection error via Windows 8 client

When I try to connect to an L2TP server via Windows 8 client I receive error 789:The L2TP connection attempt failed because the security layer encountered a processing error during initial ...
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0answers
312 views

Configure RRAS to send DNS search domain to Mac L2TP VPN client

Is there any way to make RRAS send the default search domain (ie the connection's search domain, the FQDN of the domain in question) to Mac clients who connect via L2TP? Or is this something that just ...
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0answers
356 views

718 error number while connecting to server

i have configured nttac+ to my server and set authentication to radious server , but when i want to connect to my server through l2tp i get 718 error number ! log file of nttac is : #24-02-2013 ...
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1k views

How to change L2TP/PPTP VPNs port

on centos 6 there are open source implantations of L2TP VPN (e.g xl2tp), i wanna know that if default l2tp vpn port blocked can we run vpn on different ports or maybe change cipher setting ? what ...