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.
Questions tagged [l2tp]
202 questions
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VPN client creation on Ubuntu with strongswan fails
I've set up a L2TP VPN server on my home router and the connection between Windows 10 clients works properly. Now I want to set up a VPN client on a Ubuntu 18.04 machine. I've used this configuration (x.x.x.x is the static IP of my home router and…
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How do I expose an L2TP client as a socks5/http proxy?
I want to be able to do this:
curl on client with proxy configured -> L2TP client which acts as a socks5 server -> L2TP server on the remote machine
I don't control the remote machine, and hence can't set up a better protocol. I also can't use L2TP…
HappyFace
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The specified protocol identifier is not known to the router Windows server 2022
Im trying to configure L2TP vpn on windows server 2022.
Everything goes well except when client trying to connect it shows this error :
Things ive done :
1- The l2tp preshared key are same.(server/client)
2- firewall and antivirus are both disable…
Ahad Porkar
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Windows server 2022 ports required for vpn connections have been blocked by the firewall
Im trying to enable VPN server(L2TP) inside windows 2022. everything goes as plan but in the end
the Remote Access Management Console Shows this error :
Ive also added rule for 1701 port in firewall like this (inbound and outbound) :
but still im…
Ahad Porkar
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2 answers
Upgraded to Windows 11 now L2TP VPN Connection Fails
I upgraded to Windows 11 now my VPN connections fail. They were working right before the update. The error is...
The L2TP connection attempt failed because the security layer encountered a processing error during initial negotiations with the…
Gordon
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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 us to have forced VPN disconnect after 24 hours…
Rikudou_Sennin
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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. I can RDP connect from a Windows 10 laptop to an…
Charles Bunn
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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 would move the file faster (or would it be a…
Kirk Ouimet
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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 GSuite SLDAP doesn't expose the password, I can't…
Chemdream
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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 the shared folders on the server.
Later we…
emedeiros
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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 vi or vim
My terminal is just blank/black - seem…
RonPringadi
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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 to create an L2TP connection but I can only see…
Anas4795
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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 that, another machine certificate is installed on…
TomS
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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 them here.
When I try to connect to my VPN…
Zobayer Hasan
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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 connect using the same settings.
I am running ubuntu…
robarthur1
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