Questions tagged [l2tp]
L2TP (Layer Two Tunneling Protocol) extends the PPP model by allowing the L2 and PPP endpoints to reside on different devices interconnected by a packet-switched network. Use this tag for questions about L2TP
34 questions
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How do i add a gateway for a L2TP Tunnel?
Maybe the question title is kind of odd but i dont know how to describe my problem. I have this setup.
[Client1]=eth1= --> =fa1/0=[ R1 ]=fa0/0= --
|...
- 15
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Dhp L2TP reservation on cisco 1921
I use a Cisco 1921 as L2TP server.
(I don't want to use RADIUS authentication.)
Please is someone can tell me how is it possible to do IP reservation, using client identification?
I have tried dhcp ...
1
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1
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320
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Cisco ASR1006 QoS on pppoe session: Police percent not supported - no bandwidth for percent calculation
I want to perform QoS on specific (or all the) L2TP sessions that establish on ASR1006 router (LNS).
What I have managed already is to set a police at a specific rate for a class that matches access-...
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Cisco L2TP VPNd with GRE over IPsec tunnel [closed]
I have a GRE over IPsec tunnel between router 1 and router 2.
The routing between the 2 routers is EIGRP.
I have access to the CLI and I can ping all subnets.
I try to create VPNd L2TP
I create it, ...
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335
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UNIFI USG GATEWAY IPSEC OVER L2TP VPN [closed]
At my office I have a Unifi USG Gateway that currently has 3 IPSEC VPN Tunnels (Lan-To-Lan VPN) configured. I also have a L2TP Remote VPN Network configured so that when I'm outside of my office I can ...
- 111
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90
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Windows L2TP VPN issues when accessing Site to Site VPN on Cisco 5506
We have two Site to Site VPNs and Remote Access VPN configured. Using the builtin IPsec client on OSX all subnets are accessible however when using L2TP built in client on Windows 10 ICMP traffic ...
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1
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3k
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What's the difference between L2TP and L2TPv3? [closed]
Is L2TPv3 an improvement of L2TP or a completely different technology? Other than "it scales better" and "the non-proprietary MPLS" I can't find much information about it that's ...
- 195
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How to centrally manage customer site's and users that have access to customer site's
Background information:
We have customers spread over the whole continent. We deliver and install hardware at the customers site and completely set up and configure the network for them.
After the ...
- 221
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183
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Redundant physical interfaces for Cisco pseudowire-class
I have a link which is LT2P from a site router R1 (Cisco 867-VAE, IOS 15.3) which has two external interfaces defined (dialer1 and vlan-1000), but only one plugged in (first is ADSL, second is ...
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746
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Juniper SRX Destination NAT for L2TP server
I have a L2TP server on my LAN which I would like to access from WAN and there is a Juniper SRX standing between these two networks.
I've had some success with this post:
https://forums.juniper.net/t5/...
- 73
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515
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Cisco ASA L2TP remote-access VPN with addresses assigned by DHCP
I have an ASA with a working Cisco VPN Client configuration set up. I am trying to phase out the Cisco VPN Client, initially in favour of L2TP.
The Cisco Client policy has end-users fetch their ...
- 213
2
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1
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254
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VyOS: Failure to commit after L2TPv3 configuration
I am trying to get familiar with VyOS (using a VM) and while working on L2TPv3 I encountered something strange: after configuring the L2TPv3 interface and try to commit, an error occurs as if the ...
- 147
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212
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Cisco L2TP Tunnel and NAT
I have problems with NAT clients connected to an AP .
This AP has an L2TP tunnel established to a Cisco router (7206VXR).
The session is UP and the router can ping the IP of the client.
The client ...
- 501
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1
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600
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How do protocols like PPTP, L2TP work below IP level
I have been using these protocols without deep understand how everything works under the hood.
I understand a process of tunneling as follows
When we are using protocols like OpenVPN, IPSec, SSH ...
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1
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266
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Cisco ASA: virtual Pool IP not filtered via ACL
One of our Customers has a corporate network at three different locations.
Let's assume:
location A: 192.168.1.0/24
location B: 192.168.2.0/24 and
location C: 192.168.3.0/24
At each location a Cisco ...
- 113
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What is the difference between L2TP vs GRE
Can anyone clearly explain that what is the difference between L2TP and GRE tunnel?
Is L2TPv3 Any different
I am trying to understand where these protocol are used and why we use L2TP instead of ...
- 485
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1
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600
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Why is L2TP based on PPP and not PPPoE?
I'm trying to grasp why L2TP is based on PPP. I thought PPP was a protocol for point-to-point situations where you don't have Ethernet. So why/how is L2TP using PPP in order to establish communication ...
- 89
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3
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4k
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Network Tunneling - why do we need it?
I have researched the topic of Network Tunnel but the information on this is rather confusing and inconsistent. So could someone please explain:
In general, What is tunneling? Is it simply an act of ...
- 313
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1k
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GRE over IPSec vs L2TP over IPSEC
Every single VPN provider offers L2TP over IPSec. What is the reason GRE over IPSec is never offered ? Is there any downfall ? It seems to be exactly the same.
- 590
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3k
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How to configure L2TP Client on Juniper SRX?
I have an Juniper SRX 100, running JunOS 12.1X46-D66.
I would like to use it to route all Internet traffic through an L2TP tunnel to an ISP called Andrews and Arnold, who offer this as a service. ...
- 133
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PPPoE vs L2TP protocols
I am trying to find differences between PPPoE and L2TP.Both are tunneling protocols. When to use what?
thanks,
GL
- 173
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What is wrong with my Fortigate LNS IP scheme configuration?
I'm trying to set up a VPN connection for a client-to-site scheme with a fortigate VM applicance. This is for testing puropose so all clients and the fortigate are runned on VMWare.
Here is what I ...
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L2tp/IPSEC vs pure IPSEC
So, I was reading about the L2TP protocol and I understand what it basically does. But I fail to see why it would be preferred over pure IPSEC(VPN). VPN already provides end-to-end encryption between ...
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1
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1k
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Cisco ISR L2TP VPN local vs radius authentication problem
I currently have a cisco 1841 router configured to authenticate users against a Windows NPS server. The strange thing is that when using local authentication the VPN connects first time every time. I ...
- 181
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2
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1k
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Is L2TP really a Layer 2 protocol?
My naive understanding of how the internet works is as follow :
Physical layer (1)
Link layer (2) - Inside frames
IP layer (3) - Inside IPv4 or IPv6 packets
Transport layer (4) - Inside TCP or UDP
...
- 243
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2
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649
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Vyatta/EdgeOS remote access VPN without NAT?
I currently have a ubiquiti edgerouter setup with an ipsec site-to-site vpn and l2tp/ipsec remote access vpn. Both work as intended.
Is it possible to configure the remote access (l2tp/ipsec) vpn to ...
- 391
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2
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741
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Cisco PPPoE over FA with L2TP client only (no IPSec)
This started as a question, with my connection failing to come up, but after a bit of trial and error, the configuration is working, so I've edited it into a solution. Access lists and address ...
- 221
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1k
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GRE tunnel(or even any tunnelling technique) between Alcatel 7750 and a Cisco Router [closed]
has anyone on here been able to successfully create a GRE tunnel or any kinda of tunnelling mechanism between an Alcatel router and a Cisco router.
I've been struggling with this and for a while and ...
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Why PPTP, L2TP, PPPOE are in OSI Layer2?
PPTP, L2TP, PPPOE - these are tunneling protocols. And they are Data link Layer protocols. Why?
As I understood, Layer2 protocols work only in same subnet. They don't use IP addresses and cannot be ...
- 333
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2
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2k
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How does an L2TP Client know where to forward frame?
I'm currently studying about L2TP and there's something I don't quite understand, even after studying a tutorial and some parts of the RFC. Specifically, when connected via L2TP, how does the client ...
Pepe Maglutac
4
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2
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731
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problem with cisco asa 5505 vpn configuration
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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1
answer
8k
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L2TP over IPSEC with a LAN to LAN link
I'm looking to add security on a LAN to LAN link that we have in my network.
This LAN to LAN link is used to extend vlans over 2 sites (local & remote).
For now, the diagram is this one :
I ...
- 787
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1
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1k
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What happens when you stop receiving BPDUs with no L1 loss?
We have a redundant path for some of our communications through
a.) a Metro-E provider and
b.) two routers forming an L2TPV3 tunnel.
We have Cisco 2960 switches at both ends running RSTP to prevent ...
- 1,793
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Strange drop-outs in Cisco 7200 LNS lab
I'm testing several functions on emulated Cisco 7200 routers, in GNS3, prior to actual purchase.
One of the functions I've been testing out is LNS functionality. I've been primarily following this ...
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