Server Fault Stack Exchange
Server Fault Stack Exchange

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.

202 questions
3
votes
1 answer

Is L2TP preshared key anywhere stored in plaintext on w2k8?

Some time ago I have configured l2tp vpn server on w2k8 rras that uses preshared key. Now I am trying to setup another client but the key that I have documented does not seem to be correct. I have full access to server and one client that both have…
Dusan Bajic
  • 2,056
  • 1
  • 18
  • 21
3
votes
2 answers

iptables rules to allow L2TP/IPSEC VPN behind firewall

I asked about this on the Smoothwall Express forums but they are understandably reluctant to provide to much help. After all, they really want to sell the commercial version. I need to provide an L2TP/IPSEC VPN for remote support of some new…
John Gardeniers
  • 27,458
  • 12
  • 55
  • 109
3
votes
1 answer

IPsec/L2TP VPN with OSX client: xl2tpd reports "maximum retries exceeded"

I'm following this guide for getting an IPsec/L2TP VPN server set up on a Gentoo machine, and I'm having trouble getting an OS X client to connect. From the logs, I believe I'm making an IPsec connection OK, but xl2tpd is refusing to go any further…
Tim
  • 1,158
  • 1
  • 14
  • 23
3
votes
1 answer

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), according to logs, it drops before phase 2…
Mantas
  • 31
  • 2
2
votes
0 answers

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 another Ubuntu machine in a completely different…
LLlAMnYP
  • 213
  • 1
  • 2
  • 7
2
votes
0 answers

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@enp3s0f0: mtu 1500…
off-on
  • 21
  • 4
2
votes
1 answer

OpenSwan + xl2tpd VPN: How can I share Internet connection

I have an OpenSwan IPSec + L2TP VPN on Linux setup working from off of my server so I can connect to it from my laptop (roadwarrior setup). I am able to connect to the VPN remotely just fine, however the internet connection is not shared. I'm…
Michael
  • 303
  • 1
  • 10
2
votes
1 answer

L2TP and IPSEC from Windows XP: Where do I put the IPSEC group name?

I'm completely new to networking, but need to setup a VPN. I have a linksys router and have gone through and set it up to use IPSEC and have setup a group name, user, password and pre-shared key. But I can't seem to connect via Windows XP. One…
Kelly
2
votes
1 answer

Can't Ping other local ips on l2tp vpn connection, getting: ping: sendmsg: No such device

I have setup an l2tp client using xl2tp to connect to an l2tp vpn server. The server connection requires that the connection be setup WITHOUT ipsec. So I have set up a basic xl2tp connection. The connections seems to work and I get an ip address…
user2293727
  • 21
  • 3
2
votes
3 answers

Why does VNC viewer on Mac Book Pro report RFB protocol error when connecting to AWS over L2TP?

There is a small group of us working on Amazon Web Services (AWS), we use mac books as our desktop machines and VNC into servers running on AWS. The problem started when we upgraded our VPN from PPTP to L2TP (Centos 6 with Openswan). My colleague…
Ross Addinall
  • 41
  • 1
  • 1
  • 4
2
votes
1 answer

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, however, because we're running video streams over…
rantsh
  • 145
  • 10
2
votes
2 answers

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 Linux release 7.0.1406 (Core) based on Digital…
Insspb
  • 33
  • 6
2
votes
2 answers

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 500, 1701 and 4500 for port forwarding to my NAS that…
Rox
  • 441
  • 1
  • 7
  • 13
2
votes
1 answer

Softether vpn ufw firewall config - is it correct?

I've correctly installed and configured Softether on my Ubuntu 14 x64 VPS in local bridge mode with a virtual TAP interface. What I have now is a fully functioning L2TP/IPSEC server with two network interfaces which I'd like to further secure using…
Touff
  • 183
  • 1
  • 3
  • 14
2
votes
1 answer

Authenticating Active Directory Users to Mac OS X Mavericks Server L2TP VPN Service

We have a Windows Server 2012 Active Directory Infrastructure that consists of two domain controllers. Bound to the Active Directory Domain is a Mac OS X Mavericks Server 10.9.3. The server runs Profile Manager and VPN Services. My Active Directory…
sardean
  • 833
  • 3
  • 15
  • 34
1 2
3
…
13 14