Questions tagged [l2tp]

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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Missing routes so that L2TP VPN works (no IPsec)

I would appreciate help with understanding routes and adding missing ones in the following L2TP setup: I have two OpenWRT based routers, Router A is the L2TP VPN server, and Router B is L2TP VPN ...
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Wrong certificate used when using the Windows L2TP VPN client

I have my VPN security gateway configured to only allow clients having a VPN computer certificate issued by a specific CA. Such a certificate is correctly installed on the client side. In addition to ...
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Setup L2TP Tunnel to transport Ethernet Frames on pfSense and xl2tp

We have two sites connected through an IPSec Tunnel established between a pfSense Firewall on each side. Hosts from both sides can communicate fine through IPSec. We have a new application using ATA ...
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36 views

Diagnose L2TP VPN connection failures in CentOS 7

My local machine CentOS Linux release 7.7.1908 (Core) connects to my workplace VPN using LT2P IPSec with PSK. I have two gateways, but since both of them produce similar logs, I'm going to post one of ...
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42 views

Failure to connect to a L2TP VPN over IPSec on Ubuntu 16.04

I am having issues connecting to my company's L2TP VPN over IPSEC. This is a Pelink Balance 305 router which has been configured correctly. I have checked that other colleagues have been able to ...
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L2TP VPN connection to SoftEther server returns Unauthenticated connection

I've been working from home for the past few weeks and have been using the company's VPN to access the resources due to the lockdown. Thus far, it has been working great. This week however, I keep ...
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Firewalld equivalent of “DROP l2tp” “ACCEPT L2TP if policy is ipsec?”

What's the equivalent of something like this ? DROP udp -- anywhere anywhere udp dpt:l2tp policy match dir in pol none DROP all -- anywhere ...
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Windows Server 2016 - L2TP VPN local network issuse

we configured VPN access to our server via L2TP with preshared key to tunnel our RDP admin connection. Everything works fine if we need to just connect to the server - We are behind NAT from out ISP ...
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Why can I not connect to VPN? Domain Joined and mentions “device compliance”

I have the wonderful challenge of setting up our Unifi USG to accept connections from individual domain-joined laptops. I got the supported L2TP server working (as I have used this already for months ...
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No connection to Microtic L2TP/IPSEC server on Windows

I have trouble to connect to L2TP/IPSEC server on Microtic. But only on Windows (Windows 10), when i try to conntect i get RasClient Error 789. In this case, there is no connection record in the log. ...
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234 views

Unable to Connect L2TP IPSec VPN on Mac OSX

I'm struggling to debug an issue connecting a Mac to a L2TP IPsec VPN. Macbook Pro running Mojave 10.14.6, following instructions here https://forum.peplink.com/t/setting-up-l2tp-with-ipsec/8046 I ...
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Strange client-side routes from IPSec L2TP split-tunnel VPN

I am puzzled by the routes that an IPSec/L2TP/PPP VPN sets up on the client side for a split-tunnel VPN. I am expecting a /24 route to be added on the client, but a /8 route is set up. The client ...
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What Does This L2TP/IPSec Error Mean?

I am trying to connect to a Cisco Meraki VPN that uses L2TP/IPsec. On my side I am using Libreswan/NetworkManager to configure my connection. When I try to connect, I get logs as follows: Mar 02 11:...
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71 views

RDP connection failed after logging into VPN (L2TP/IPSec) on a sever

I have a virtual machine Win 10, and I can connect to it via RDP (Remote Desktop Protocol) from my local laptop. Now I want to establish a VPN (L2TP/IPSec) on the remote Win 10 to a third host, ...
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77 views

L2TP (xl2tpd) IP Address Allocation

I’m making my own study of different ways to establish tunnels between Debian server (LNS) and Android OS (LAC). In case of L2TP without any encryption, LACs should routing traffic through ppp tunnel ...
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Route trafic from one wAP to VPN

i have two mikrotik routers. One router - 2011 (main) has public static IP address and has L2TP over ipsec vpn server running on it. I can connect to it from laptops and mobiles. When i connected, my ...
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My centos based m2m gateway not Forwarding packets from l2tp to eth1

I am getting data from a remote RTU (192.168.100.2) to my server through L2TP on peer ip (168.18.13.3) over public ip defined on eth0. I configured eth1 with 168.18.13.1 And this is connected to ...
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route l2tp server to openvpn client

i configured l2tp/ipsec server on ubuntu also i installed openvpn client on this server i need when l2tp client connect to this server traffic forward to openvpn and client get openvpn server ip ...
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Accessing to the Internet via L2TP and SSH proxy

I have One Client machine and Two VPS and their OS are CentOS 7. I am able to connect to VPS 1 by L2TP, But I want to connect to VPS 2 from VPS 1 by ssh and get connected to the Internet. (Client) =...
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L2TP VPN has no Internet access on iOS clients but works on Windows/Android clients

I have a pretty simple setup right now for my family who live in Iran to get them internet access, since the government has shut down their internet. My VPS is running Windows Server 2012 R2. I have ...
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L2TP/IPsec VPN connections do not work on Window s7/10

I am having issues recently with VPN connections on Windows 7 & 10. The connections that worked great do not connect at all any more. Didn't know about the issue, as I work on Mac. Is there a ...
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635 views

TP-LINK TL-MR6400 IPSEC L2TP VPN tunnel with GCP server

I have a TP-LINK TL-MR6400 router, connected to internet by means of an LTE sim. This is a very rough network diagram of my current situation.1 My IoT services sit behind the TL-MR6400. Unfortunately ...
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DSCP Marking on Layer 2 Tunnel Packets

How to set DSCP marking on Layer2 Tunnel Packets. eth0<...........................................>eth1 10.10.10.1 10.10.10.2 br0}tun1+eth1 ...
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513 views

Setup l2tp using Strongswan

I setup ikev2 using Strongswan, Now I need to add l2tp support to that What is the best and easy method to add l2tp support to Strongswan? Appreciate for any help
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No internet access through L2TP/Ipsec using Ubuntu 18.04 - Routing table

I have set up a VPN network using the package https://github.com/nm-l2tp/NetworkManager-l2tp. The VPN works well (on certain situations) but I think there's a problem with the routing. When I'm not ...
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866 views

Connect Ubuntu 19.04 Server to Ubiquity Unifi USG L2TP VPN Server?

I am trying to connect a remote Ubuntu Server 19.04 instance to a Ubiquity Unifi USG L2TP VPN Server. I have the VPN server set up as an L2TP server with PSK and verified that it is working by ...
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626 views

L2TP over IPSEC strongswan/xl2tpd slow connection debian 9 and 10

I have tried almost anything - my internet connection 500 Mbit/s I connect from the same external IP subnet so my speed to the server is also 500 Mbit/s. When i use wget from my l2tp server i have ...
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153 views

Windows RRAS VPN L2TP throughput

I have a windows server 2016 RRAS VPN + DHCP working very fine. It distributes IP to VPN clients and to other machines on the local network. We use L2TP protocol with a shared key for encryption. ...
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612 views

Strongswan CentOS 7 to Mikrotik Router L2TP VPN “NO_PRPOSAL_CHOSEN”

I have reviewed existing Q&A on this issue and, maybe there's a hook I'm not seeing, but I don't know what else to try. I get this output when attempting to launch VPN from CentOS "client": [...
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459 views

Mikrotik L2TP/IPSEC VPN setup

Issue: Setting up L2TP VPN using IPSEC and the connection fails after getting an IPSEC key (and establishing). Steps taken: Reloaded and reconfigured using different instructions (several times) ...
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725 views

Windows Server 2019 - L2TP VPN in RRAS only accessable from internal interface, not from external

I have a problem installing a L2TP VPN Connection with Windows Server 2019. There are two interfaces: "Intern" - 10.0.0.1 / Internal interface "Extern" - 192.168.2.3 / External interface, connected ...
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481 views

L2TP VPN connection not working - PAYLOAD_MALFORMED

I am trying to replace an old VMWare server (ESXI 5.1.0) with a new one (ESXI 6.7.0) and to do that we are trying to replicate the setup of the old one. We have another physical server that needs to ...
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886 views

Trying to setup L2TP and IKEv2 on the same server with Strongswan

I'm attempting to setup both L2TP (for use on my Android phone) and IKEv2 (for use on my Mac) on the same server with Strongswan I'm getting the following error when connecting L2TP, but IKEv2 works ...
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377 views

L2TP/IPSec: Linux can not connect to Cisco ASA (but Windows can)

Our partner provides a service that is available only through the L2TP/IPSec tunnel. We successfully connect to it from Windows, but the connection hangs dead a couple of times a week. Therefore, I ...
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451 views

How do I route internet traffic through an established L2TP connection?

I am struggling to connect and, more importantly, route traffic from an Ubuntu server (this means that Network-Manager and any GUI tools are out of the question) to an L2TP-IPSec VPN server running on ...
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L2TP ipsec using network-manager-l2tp and strongswan ubuntu 18.04

The VPN works flawlessly on OSX and Windows 10 but no luck with ubuntu VPN gets connected on ubuntu using Phase1 Algorithms : 3des-sha1-modp1024 Phase2 Algorithms : 3des-sha1 And in 10 seconds ...
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817 views

SoftEther VPN AD Authentication only works for wildcard user

I'm using SoftEther on SBS2011, with L2TP/IPSec protocol. My initial client is Windows 10 with built-in L2TP/IPSec protocol. In my SoftEther Users, if I add a wildcard (*) user, and select "NT Domain ...
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768 views

How to stop Windows Filtering Platform blocking ICMP packets for legitimate RDP traffic over L2TP tunnel?

RDP via Windows 2008 L2TP to Windows 10 Pro did never work flawless. The first attempt in September 2018 needed the client Cord.app to be replaced with Royal TSX on OS X 10.9.5. The remote Win10 box ...
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210 views

VPN into router behind a Sonicwall

We've installed a Sonicwall TZ Firewall and have configured an L2TP/Ipsec VPN. The SonicWall is connected to an internal router on the subnet 192.168.168.0/30 with the SonicWall on 192.168.168.1 and ...
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549 views

Administration of multiple sites (tunneling) - MikroTik & NAT

I would like to ask you for your opinion. I need to find a secure way how to manage small remote sites where I have RBs. We have HQ, where is Kerio Control as a FW and a lot of small sites with ...
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How to veryify if VPN network encrypt data correctly in Windows 7?

I configured IPSec VPN network on my router and I successfully to this VPN in local Network. I have now 2 connections under control panel: Local connection My vpn I configured full data encryption, ...
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297 views

Configure L2TPv3 on Ubuntu using hostnames for peers instead of IP

Is it possible to configure L2TPv3 using ip l2tp commands on Ubuntu 18.04 but using hostnames for peers instead of static IP addresses ? If so can someone give me a hint on how to do this ?
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strongSwan 5.6.2 and xl2tp 1.3.12 on Ubuntu 18.04 SA established but no traffic

Since updating strongSwan and xl2tpd to the latest versions available for Ubuntu I encounter a problem with ESP and AH in L2TP. Server config: Interface for generating traffic ens224: flags=4163<...
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How to forward IPsec VPN with iptables

Hello I have some questions on how to use iptables to forward IPsec VPN data. Here is what I want to do: WAN Computer -- (eth1/WAN IP)Server1(eth0/10.81.1.2) -- (eth0/10.66.2.3)Server2(eth1/WAN IP) ...
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701 views

How do I get an L2TP Foxpass VPN connection working in Windows 10?

I have an office VPN that I need to connect to which uses L2TP/IPsec with a pre-shared key. At home (on my home network) I have two computers: a MacBook Pro, and a Windows 10 machine. I am able to ...
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3k views

Windows VPN client - how to make it connect to a different port?

I have a L2TP/IPsec server setup on a CentOS box that I am using for multiple purposes, and I wish some clients connect one way, other clients connect the other way, and get different sets of ...
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157 views

RRAS L2TP VPN DNS Issue on iDevices - No Internet

I've setup an L2TP VPN server on Windows Server 2012 using RRAS and NPS primarily for connections from iPhone/iPad clients etc, the problem is I can't get internet connectivity to work when connected ...
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856 views

Windows RRAS VPN failing to set options on Mac L2TP clients due to DHCP relay discarding packets

When setting up an L2TP VPN service for remote access on Windows Routing and Remote Access, we ran into an odd problem with setting options on the connecting clients. The way to provide these ...
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616 views

Using a Windows Server 2016 AWS instance how can I allow the ESP protocol in the security group of the server?

Stack Overflow Link I am following. (last step of step 1 of the anwser I have attempted to change the inbound/outbound security groups for my server but ESP is not on the list of protocols. I tried ...
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l2tpv3 tunnel with local ip in vrf (linux kernel vrf)

On a ubuntu host I have two identical ip addresses configured on two interfaces enslaved to two different kernel vrfs. Here they are: mikle@LabHost:~$ ip link show vrf VRF1401 7: enp3s0f0.1401@...