strongswan | strongSwan - IPsec-based VPN | VPN library
kandi X-RAY | strongswan Summary
kandi X-RAY | strongswan Summary
strongSwan is an OpenSource IPsec-based VPN solution. This document is just a short introduction of the strongSwan swanctl command which uses the modern vici Versatile IKE Configuration Interface. The deprecated ipsec command using the legacy stroke configuration interface is described here. For more detailed information consult the man pages and our wiki.
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strongswan Key Features
strongswan Examples and Code Snippets
Trending Discussions on strongswan
This tutorial use
left parameter when setup strongswan, while this tutorial also use
leftid parameter. What is the difference between
ANSWERAnswered 2021-Feb-24 at 02:34
Found answer from here:
Trying to understand systemd and craft a service that works , using two bash scripts I have to down/up an IPsec/L2tpd tunnel. All works fine if I use the bash scripts commands from the command line, but for some reason I'm getting race conditions or lack of sync or something because using my systemd unit file is random and intermittent often requiring a random number of restarts to get it working.vpn-disconnect.sh ...
ANSWERAnswered 2020-Nov-20 at 16:06
It does not look like a good idea to start VPN as a service. It is possible indeed but the service is supposed to start on system boot, so you have to cope with dependency on network etc.
Since your scripts work OK in standalone mode, I would suggest to use them as up/down hooks for a main network interface (see e.g. Run script when eth0 UP).
P.S. In this line
I have 2 strongswan connected, each can ping the other.
My problem comes when either of the subnets want to ping an ip on the other side, it doesn't happen.
I know i need to add some masquerading but i can't figure out how (i have added the routes on the other network elements with
route add -net x.x.x.x/x gw x.x.x.x)
ANSWERAnswered 2020-Sep-26 at 12:45
So i needed to:
on the gw with subnet 10.10.0.0/24:
I have set up a VPN to an Azure IKEv2 gateway following instructions from these sites:
I had originally used the StrongSwan Gui version but after checking found that none of the configuration mentioned in the cli version had been completed so I worked through the cli version. When I start the VPN I get no errors and I can see logs in syslog that indicate the connection is set up. When I browse to a page that I need the connection for I get an error page stating DNS error. It has connected on more than one occasion and I have used the page but then if I turn it off and start it up again it does not work. I haven't found a pattern for it working yet and seems to be genuinely random.
I am on Ubuntu Linux...
ANSWERAnswered 2020-Aug-02 at 11:39
Finally I have figured this out. The last problem I had was a DNS problem setting dns server from Azure gateway. To fix this I had to install resolvconf and configure it for dynamic updates.
I had to:
- install and configure strongswan (best instructions I found)
- set mss/mtu in the charon configuration (as mentioned in this post)
- Install & configure resolvconf (as in answer here)
- Set up network manager vpn (The graphical element for top right of menu)
when that is done I bring up the connection
I have installed strongswan VPN on GCP Compute engine(Ubuntu 20.04) by referring https://www.digitalocean.com/community/tutorials/how-to-set-up-an-ikev2-vpn-server-with-strongswan-on-ubuntu-20-04
have 3 different projects and I set up a tunnel for all from Strongswan VPN Compute Engine.
below is the ipsec.conf file...
ANSWERAnswered 2020-Jul-28 at 06:34
On GCP Compute Engine IP Forwarding was off, so that was the problem.
I take a snapshot of the Compute Engine and create new one using it and mark IP forwarding to ON.
I was exploring the
IKEv2 StrongSwan client implementation for Android. What I fail to understand is that
Java do not support raw sockets, whilst the
IKEv2 / IPSec works below
Transport layer, which seems counter-intuitive. How exactly does the communication happen after the
IPSec SA is established?
- The official documentation for IKE Charon keying daemon does mention the use of
socketin the architecture diagram, but I was unable to find any further reference to it.
- I'm aware of the fact that StrongSwan's Android client uses a user-space implementation of
libipsec, but again how does
libipseccommunicate without raw sockets?
Any help to fill the gap in my understanding is much appreciated!...
ANSWERAnswered 2020-Jun-19 at 12:48
The client only supports UDP-encapsulated ESP. These packets are sent/received over the same UDP sockets that are already used for IKEv2. This limitation is mentioned on the app's wiki page.
I am trying to run the following command in the PowerShell...
ANSWERAnswered 2018-Oct-04 at 00:30
I ran into this also. It looks like the error happens at line:1 char:1. So I assumed it doesn't understand what "sc" is. So I changed
sc create .. to
sc.exe create .. and it worked for my service.
I need to connect a Vpn programmatically in my app, but can't seem to find a way. I see VpnService, StrongSwan, OpenVpn but this seems not IPSec. How do I go about connecting to my already build IPSec and L2TP servers that have a username, password and pre shared key....
ANSWERAnswered 2018-Apr-25 at 12:53
You can not do it in the latest versions of Android. It could be done via SystemProperties.java class which has API available for these connections, but these API are now hidden in the latest Android versions due to Security risks.
However if the phone is rooted then you can use it via hacks like reflection etc to access those System properties and get everything going.
I am working on VPN app and follows the code of strongswan app. I have used the code of this app and it is loading
.so files through JNI and i have copied these files from the strongswan project. It gives this exception for one of these files:
ANSWERAnswered 2018-Dec-13 at 07:59
Package name in the exception is the package name of the project from where i copied the code. "org.strongswan.android.logic.CharonVpnService"
but my app's package name is "com.whizpool.vpn.logic.CharonVpnService".
No, you cannot do this. You have to specify the package name and class name exactly the same as the one referenced inside JNI code. The shared libraries, i.e. the
.so files, have to match well with the correct Jar library because of the package name and class name are the unique references from C side to refer back to Java side.
I'm trying to encrypt my ICMP packet with AES128-CCM16. I used c openssl library for encryption. But encrypted result is wrong!
I used two Linux 18.04 VM for simulating ESP packet with strongswan IPsec. I captured ESP packet and printed my whole variables in my decrypt function....
ANSWERAnswered 2019-Jun-25 at 00:51
I solved problem. So answer myself
EVP_EncryptInit_ex(...), below code should be inserted.
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