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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27 views

Access RDP through VPN only

i have been reading about this for a few days now, but i couldn't figure it out, i know that this has been asked previously, but i am having issues setting this up. i have read these articles on this ...
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Can I have multiple clients login to the same VPN User?

I am using L2TP with IPSec on Windows Server 2019, and was wondering if its necessary to have a separate user for each tunnel. At the moment there is only one windows user that can login to the VPN. ...
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Is it possible to have L2TP/IPsec VPN auto disconnect after x hours?

I couldn't find anything on Google, everything that I found was related to the opposite problem, VPN disconnecting when people don't want it to. A little backstory: one of our potential clients needs ...
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L2TP Issues AWS EC2

I'm trying to set up l2tp inside an AWS VPC, I'm having problems. I'm on a MAC OS and I keep getting an error "A connection could not be established to the PPP server. Try reconnecting. If the ...
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Can VPN Client work on Windows Server 2016?

I've setup a VPN Server (Remote Access) on my Windows Server 2016, which is mostly used for hosting web applications in development state, so there is not much configured on that, not even an AD. The ...
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Sporadic IPSec L2TP remote access VPN failures for some users

I have set up an IPSec L2TP remote access VPN server on an Ubiquiti edge router. Clients connect using the native MacOS client. Some users have problems. Their VPN occasionally disconnects. When they ...
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55 views

How to encode Pre-Shared Key (PSK) of and L2TP IPSEC connection managed by Network-Manager

If I create a VPN L2TP IPSEC connection using Network-Manager GUI, I introduce the PSK, but this one looks different on /etc/NetworkManager/system-connection/myvpn.nmconnection I am thinking the PSK ...
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127 views

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 ...
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RDP fails to connect across L2TP VPN

I have a working L2TP VPN that I can ping all clients once connected, name resolution does not work but I believe that is a separate issue. I cannot connect using RDP between two Windows 10 machines. ...
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4k views

Configuring L2TP VPN to use with iOS 14 and macOS Big Sur

After Apple did this in Big Sur OS I can't connect to my own VPN on Libreswan 3.27 (netkey) on 3.10.0-1160.6.1.el7.x86_64 Starting with iOS 14 and macOS Big Sur (coming soon), IPsec supports HMAC-SHA-...
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535 views

Cant connect to VPN via L2TP/IPsec on mac, but connection on windows works

I've setup connection on one of our mac computers running MacOS 10.13.6 High Sierra. I've entered user, password, preshared key ect. but I Cant connect to VPN (getting VPN server did not respond error)...
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Is there a speed and performance difference between VPNs (L2TP, etc.) vs. port forwarding?

Let's say you wanted to transfer a 1 GB file from a machine at site 1 to a machine at site 2. You can either connect the two machines via a VPN (L2TP) or basic port forwarding. Which connection method ...
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VPN disconnects often with L2TP/IPsec psk using android 7 tablet

Using vpn with L2TP/IPsec psk, unintentionally disconnection happened on android 7 tablet frequently. This issue not happen on android 6 tablet. Tablet is F04-H released by Fujitsu, and vpn settings ...
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350 views

Unable to connect with L2TP VPN in Ubuntu 20.04

When I connect to vpn using my broadband internet connection with router, the connection establishes properly. Few things happening: I get ping in vpn, however, I cannot browse website or use ...
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Windows Server 2012 R2 RRAS L2TP interfaces freeze until reboot

Sometime L2TP interface in Windows 2012 R2 RRAS sets its status to Disconnected and does not try to connect any more. When connecting manually it takes 4 seconds and gives an error "Interface ...
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344 views

How to route traffic between L2TP/IPSec and WireGuard tunnels?

I have a KVM VPS running Ubuntu 18.04 which is simultaneously: L2TP server (xl2tpd + strongswan) with IP 192.168.42.1/24 Wireguard client with IP 192.168.73.3/24 (server's IP is 192.168.73.1/24) ...
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127 views

What is an authentication method for L2TP or IKEv2 VPN that sends the username and password?

Google's GSuite Secure LDAP does not expose userPassword. CHAP, MSCHAP and other authentication do not send the password. They assume the server knows the password and can use a challenge. Because ...
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L2TP over IPSEC. Both tunnel and transport in one configuration

I have existing L2TP over IPSEC VPN, running in the transport mode Is it possible also to have a tunnel mode running in parallel? I just stuck at the configs, and can't make it working Some ...
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VPN Connects via PPTP instead of L2TP

I am managing datacenters of two companies located in two different countries. Company1(Ivory Coast): I Configured VPN Type: Layer 2 Tunneling Protocol with IPsec (L2TP/IPsec) on physical desktop ...
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59 views

In a VPN, how to access resources inside a connected office from the VPN server

I have this Windows Server running on AWS, running a VPN with RRAS and NPS. The initial setup included only SSTP, and the users could easily connect from their Windows computers on their homes and use ...
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Cannot reach TCP services through vpn when using a different gateway until succesfull ping

I cannot figure out this, furthermore I'm not sure which side is the culprit, but I think that the issue is on the pfsense's side. See the below scheme: I have in my central office two routers: the ...
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Always hung on Vi, vim, but not nano when using company VPN

I have a strange problem. IT changed the VPN to a newer Cisco device. After connecting to the VPN, I can ssh to one of our corporate server. I can ls, cd, cat, sudo. BUT if I tried any editing using ...
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120 views

How to force the server to set ppp0 and ppp1 for the specified VPN connections?

I have two different VPN connections on a server as below: The first connection from a mikrotik server (192.168.100.128 as the client) to the main server (192.168.100.99 as the host with ppp0). The ...
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186 views

L2TP on Yocto project can not find tunnel

I have a problem with l2tpvpn on yocto project. My server on ubuntu 18.04 and i have set it up client on ubuntu and have run successfully but with yocto it lose. when I run the command /etc/init.d/...
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291 views

VPN between 2 Mikrotik routers and static IP using LTE USB Modem

I am trying to setup a VPN tunnel between two sites. Both sites are using a Mikrotik U951 with two Jazz 4G modems. Each 4G service has been allocated a static IP. The main problem is that I am trying ...
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183 views

l2tp/ipsec unable to connect on linux

I'm trying to connect to cisco l2tp/ipsec vpn with PSK and IKEv1 username/password. According to this article, I've found that server supports following authentification methods: SA=(Enc=3DES Hash=MD5 ...
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How can you modify the registry “ProhibitIpSec” without restarting the computer?

I need to connect L2TP vpn, but I must modify registry "ProhibitIpSec" (HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Rasman\Parameters\ProhibitIpSec) to value "1", must restart after the ...
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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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44 views

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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161 views

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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676 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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2k 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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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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63 views

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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2k views

Unable to Connect L2TP IPSec VPN on Mac OSX [closed]

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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186 views

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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526 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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134 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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49 views

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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63 views

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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2k 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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1k 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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1k 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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949 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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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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1k 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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1k 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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1k 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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537 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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