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Questions tagged [ipsec]

IPSec is a method to provide internet security over the layer 3 of the OSI model.

Security Protocol (IP Security Protocol, better known by its acronym, IPsec) is an extension of the IP protocol that aims to be the standard method for providing user privacy (increasing the reliability of the information provided by the user to a location of internet, such as banks), data integrity (ensuring that the same content that reached its destination is the same source) and authenticity of the information or identity spoofing prevention (ensuring that a person is who they claim to be), when transferring information over IP networks via the Internet.

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IPsec versus L2TP/IPsec

I have a VPN service which gives me the option of connecting via PPTP, IPsec, or L2TP over IPsec. PPTP i know is inferior in terms of security and encryption, but I'm not really sure what the difference is between the two IPsec options. Anecdotally,…
Chris Pratt
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Does the traffic go through my company network when I browse when connected through SSL-VPN

I work for a company which is not in my country. The enterprise intranet is in a different country. We do not have many employees in my country - so everyone works from home. When we need intranet access, we connect through VPN to the company…
user93353
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How to auto save a Cisco VPN connection password on Mac OS X?

I have set up a Cisco IPSec VPN connection instead of using the Cisco client on Mac OS X. I like it fairly well, it just sits in the tray next to the clock and allows me to easily connect and disconnect. However, the one disadvantage to this is that…
cwd
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L2TP/IPsec VPN fails to connect on Windows 10 - Works fine on iOS

I’ve configured an L2TP/ipsec server with a pre-shared key that works like a charm on my phone. I’ve tried several ways including disabling of firewall to connect on Windows 10 but it always fails. Here is the error it throws: How can I make it…
Asad Moeen
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IPsec in the Linux Kernel

I have some issues (questions) related tot the Linux Kernel implementation of IPsec and it's user-space interface. The biggest question is which is the actual official project for the Linux Kernel IPsec implementation? From what I understood the…
Catalin Vasile
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Forward IPsec tunnel from IPv4 endpoint to IPv6 endpoint

I have a new ISP and only have a Dual Stack - lite connection now. That means I can't access my router via IPv4 anymore, since the external IPv4 address is private. I have native IPv6 connectivity. My IPSec tunnel cannot work on IPv4 only networks…
Jonathan
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L2TP/IPSec stopped working after openssl upgrade

VPN connections from my MacBook / iOS devices to a Debian server having openswan / xl2tp were working just fine until I used apt-get to upgrade everything due to openssl heartbleed announcement. Now the VPN connection stopped working with the…
Dennis Kreminsky
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How do I configure DD-WRT to forward IPSec traffic to an internal server to support a road warrior configuration?

I use dd-wrt as my home router setup and that's been working fine. Now I wanted to figure out a way to be able to use my iPad to set up a IPSec tunnel to my home network while I'm on the road. PPTP is pretty much insecure at this point so I want to…
jnman
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Connect FortiClient IPsec VPN via Ubuntu 18.04 KDE

I have just installed FortiClient 6.0.0.0029 in Ubuntu 18.04 - KDE. I'm not shure, but looks like Linux's FortiClient has only SSL connection but not IPsec (which I need)... Works ok in Windows 10, but mine has some bugs and I prefer to work with…
Borjovsky
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Can someone help me understand ALG and VPN settings on my router?

I'm looking at the settings in my TP-LINK WDR4300 router and noticed settings for VPN passthrough and ALG. Every single option is enabled but I am hoping someone can help me understand these settings and what they do and whether or not I should…
mocky90
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How to use IPsec?

IPsec is a protocol suite built on top of IP. Originally designed with IPv6, it also exists in IPv4. IPsec enables encrypted communications between hosts at the IP level (that is, upper layers such as TCP, or HTTP, or HTTPS, SSL do not have to be…
Ian Boyd
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How can I route only a particular subnet to the StrongSwan VPN but not my whole traffic on linux?

I have no particular competences on networking, so I'll do my best to explain my needs. On my Linux laptop I'm running StrongSwan (with NetworkManager) to connect to a particular VPN with IPsec. This VPN lets me reach these kind of IPs…
Codemix
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L2TP/IPSec On Mac Failed to connect

I am connecting to a VPN Server set up following instructions in https://github.com/hwdsl2/setup-ipsec-vpn And I setup the clients following https://github.com/hwdsl2/setup-ipsec-vpn/blob/master/docs/clients.md#os-x Under the same LAN, one of my…
addlistener
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Can't connect to L2TP IPsec VPN from Windows 10 but it works with macOS High Sierra

I am trying to connect from a Windows 10 client to an Ubiquiti EdgeRouter VPN, I went through the instructions on https://help.ubnt.com/hc/en-us/articles/204950294-EdgeRouter-L2TP-IPsec-VPN-Server but whenever I try to connect to the VPN I get the…
div-opn
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Remote Access VPN on Cisco IOS doesn't complete phase 1

I have successfully configured my Cisco router to create a VPN tunnel to Azure. This is working fine. Now I am trying to add a remote access VPN for clients. I want to use IPsec and not PPTP. I'm not a networking guy, but from what I've read, you…
Timothy
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