IPsec (Internet Protocol Security) is a protocol for securing IP communications by authenticating and encrypting each IP packet of a communication session.

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OpenSwan IPsec connection drops after 30 seconds

I'm trying to connect from my Linux Mint 16 box to a CloudStack server through IPsec L2TP. Building up the connection works (pings work across the tunnel). However 30 seconds later the IPsec tunnel ...
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24 views

How to set up vpn tunnel (ipsec) connection

I'm working with a client who wants to set up a vpn tunnel between their network and ours. They're in charge of the tunnel and to give us the access they are asking me my public IP and my LAN IP. ...
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24 views

Routing internet traffic through a site-to-site IPsec tunnel

We are trying to replicate what is described at https://doc.pfsense.org/index.php/Routing_internet_traffic_through_a_site-to-site_IPsec_tunnel#Set_up_the_IPsec_tunnel_Phase_2 We are using 2 ...
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16 views

IpSec/Racoon: Packets go to wrong tunnel

I use Debian and Racoon to connect to a Cisco VPN Gateway. We have got two tunnels between the same endpoints. Somehow and sometimes, packets go to the wrong tunnel. This is the log message from the ...
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24 views

Linux IPSec, association established but no traffic

We are attempting to setup an IPSec tunnel from a Debian firewall/router to a Netasq hardware firewall. On the Debian side the tools used are IPSec-tools and Racoon. The IPSec SA is established ...
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66 views

ipsec verify on ubuntu Two or more interfaces found, checking IP forwarding [FAILED]

Ubuntu 14.04, Openswan U2.6.38/K3.13.0-30-generic When I run ipsec verify I get this error. Two or more interfaces found, checking IP forwarding [FAILED] I see quite a few of this same ...
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34 views

openswan slow initial iperf tests

I have some working tunnel servers and although they appear to work, I'm concerned about the results of some performance tests I've been performing. The results look much like this: ...
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82 views

Multiple Windows clients behind a same NAT gateway cannot connect to L2TP/IPsec VPN server at the same time

I have set up a L2TP/IPsec VPN server on a cloud VM (with a public IP address) running CentOS 6.5 (kernel: 2.6.32) with openswan/xl2tpd (openswan: 2.6.37, xl2tpd: 1.3.6). However, if multiple Windows ...
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1answer
77 views

Site-to-Site IPsec vpn not sending ping across a tunnel

This is my first attempt at a site-to-site VPN. I chose to use IPec because it appeared to be the best solution for what I needed to accomplish. I've followed several different tutorials over the last ...
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20 views

IPSEC on linux with multiple remote ISP

I have configured 2 ipsec VPN connection from my linux server to my clients locations. the reason being the client has two ISPs a primary and a secondary on. The client wants to switch to secondary ...
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133 views

Cannot connect to IPSEC/L2TP VPN Arch Linux/Windows 8

I have check a lot of other L2TP/IPsec VPN post and none of them seem to quite match the issues I am having so here is what going on. I am trying to set up a VPN on my Arch Linux server that I can ...
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91 views

Trying to replicate a working IPSec/L2TP config from OpenSWAN to StrongSWAN

I have a working OpenSWAN implementation for RA, using IPsec transport and l2tp for the tunnel, running in AWS. The instance has a private IP, with a public EIP mapped to it. I use the private ip for ...
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1answer
83 views

Openswan and OpenVPN

I have installed Openswan and have configured IPSec tunnels and they work perfect until i install OpenVPN. Now i can't find out way the ping wont work. When i execute the "service ipsec status" it ...
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163 views

TCP connection through IPSec (Linux/Strongswan) stalls after exceeding PMTU

The backups (via Bacula) of one of my servers (“A”) connected via IPSec (Strongswan on Debian testing) to a storage daemon (“B”) don't finish 95% of the times they run. What apparently happens, is: ...
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101 views

Windows 7/8 Strongswan IKEv2 Wrong Gateway

I have setup Strongswan on Ubuntu 14.04 from the official package. I use IKEv2 with PKI authentication and a custom authorization plugin. This works great for Android and Ubuntu clients using ...
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1answer
19 views

Is there a way to use an external program to authenticate XAuth with StrongSwan IPSec?

I'm currently using StrongSwan for my iOS devices to connect. I was wondering if there is a way to use an external program for XAUTH? I currently have the following configuration: : RSA server.pem ...
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56 views

Cisco ASA 5505: PAT / NAT between 2 IPSec Tunnels

I've the following Setup: Customer <-> HQ <-> Branchoffice The Customer has a 192.168.1.0/24 subnet. On the HQ only the VPN Gateway is in my context, 172.20.10.1 . And on the Branchoffice ...
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169 views

Allowing LDAP authentication from DMZ to Active Directory. Is my idea secure?

I have a internet-facing application server that I want to use AD authentication. This is my first time doing this for a none MS application or without some sort of proxy. I already have a idea in my ...
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108 views

How can I configure IPSec on Windows 2012 R2 to use Pre Shared Key compatible with Android phones?

Our company has to comply with the mandate that all mobile phones use L2TP or IPSec VPNs when using untrusted Wifi or GPRS connections... namely to protect from MITM attacks. Were also interested in ...
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50 views

vServer: Configuring single (/128) assigned IPv6 addresses for use as IP address pool for IPSEC (Strongswan) road warriors

I've a new (dev) vServer up and running. Unfortunately the provider only hands out single IPv6 addresses (not even /64 subnets). Now I am a bit confused how to achieve the following: I want to use ...
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37 views

Route between two branch offices via IPsec VPN to head office?

I have TMG 2010 running on Server 2008 R2 in our head office with 2 branch offices connecting in using Dray Tek 2930 routers with IPsec site to site VPNS. The remote sites can route between the head ...
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236 views

Allow traffic from ssl-vpn to enter ipsec tunnel on fortigate

we configured our FortiGate 50B to route traffic from our local net 192.168.10.* (which is our office) to a remote network 172.29.112.* using an ipsec tunnel. Everything works fine as long my computer ...
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94 views

Windows 2008 R2 site-to-site IPSEC tunnel with Juniper: tunnel up but packets are lost

I am stuck on this task almost for 2 days. Organized a site-to-site IPSEC tunnel between Juniper and Windows2008R2 machine (let's call it W2008R2 for reference). W2008R2 is a multihomed machine (2 ...
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1answer
145 views

SSH not working over IPSec tunnel (Strongswan)

I configured a small network on a cloud virtual machine. This virtual machine has a static IP address assigned to eth0 interface that I'll call $EXTIP. mydomain.com points to $EXTIP. Inside, I have ...
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87 views

Windows 2008 R2 IPsec encryption in tunnel mode, hosts in same subnet

In Windows there appear to be two ways to set up IPsec: The IP Security Policy Management MMC snap-in (part of secpol.msc, introduced in Windows 2000). The Windows Firewall with Advanced Security ...
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306 views

Vpn tunnel to Amazon VPC with pfsense

I'm trying to create an ipsec tunnel between my office and our Amazon VPC. However I have never used ipsec before so I'm at lost. The gateway/firewall is running pfsense 2.1.3-RELEASE (i386) on ...
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67 views

IpSec: racoon-tool does not allow to specify key size (AES 256 bit required)

I try to use racoon-tool to configure a IPSec tunnel. The foreign gateway requires me to use AES 256 bit encryption. Unfortunately, racoon-tool only allows me to give "aes" as an option. The handshake ...
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1answer
56 views

xl2tpd doesn't connect and no logs with Openswan

I'm using Openswan and xl2tpd to set up a VPN connection for a Windows computer, everything looks perfectly configured and the IPSec connection is successful : STATE_QUICK_R2: IPsec SA established ...
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1answer
139 views

FreeRADIUS w/ MySQL backend. IP Pool

I have a pool of addresses (172.16.0.0/24) configured on my NAS (Cisco 2921 router) for my IPsec clients. I have various subnet mask length subnetworks used for different user groups. For example I ...
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500 views

Strongswan (IKEv2) connection established, but no traffic routing

I've seen this sort of question posted a few times before, but so far, none of them have solved my issue. I'm trying to set up an IKEv2 VPN on my Ubuntu Server to use with my Windows Phone using ...
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1answer
82 views

How to exclude LAN traffic from IPSEC policy

I am trying to replace a Firewall/VPN appliance (Snapgear SG300) with another (Mikrotik RB951G-2HnD). My current router works, but, for the new mikrotik router, when I add the phase 2 tunnel, I can ...
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151 views

Openswan sessions hanging with multi user VPN configuration (ipsec/l2tpd)

I've got a linux box running openswan and xl2tpd. It's a simple configuration with multiple users connecting using a sharedKey, and then establishing an L2TP connection with PPPD providing the ...
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122 views

Is it possible to do IPSec Site to Site VPN without static & public IP on one end?

I am working on a project for my engineering degree that requires me to interface with some pre-existing equipment, so I am rather limited on my options. I'm rather new to VPN and ipsec for that ...
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57 views

Openswan is not restaring

I am configuring new ip-address in configuration file /etc/ipsec.conf & restarting Openswan. But, It struck & not started. Here is my logs: Apr 26 18:02:16 (none) authpriv.warn pluto[11631]: ...
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837 views

IPsec Xauth RSA - Debian 7 and Android 4.4 VPN (Always-ON) and Mac OS X 10.9.2 VPN (On Demand)

I successfully installed IPSec Xauth RSA using this instruction: http://jsharkey.org/blog/2012/09/22/deploying-a-pure-ipsec-pki-vpn-server-for-android-devices/ In brief: apt-get install ipsec-tools ...
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39 views

is there any cisco-compatible ipsec+comp module?

I am looking for a waqy to establish an Ipsec tunnel(with lzs-compression enabled) between a cisco router and a host(using strongswan or sth else). I can establish a tunnel without lzs-compression. ...
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2answers
247 views

Elastic IP address on EC2 instance interface without 1:1 NAT

I have a basic Amazon VPC set up with a public and private subnet. I have deployed a Vyatta router in the public subnet that does NAT for the private subnet. I have an elastic IP address assigned to ...
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1answer
626 views

Openswan Cisco ASA 9.1 — cannot resopnd to IPsec SA request because no connection is known for

Ok, so I have a simple VPN IPSEC setup with a single Linux host that has a public IP address and a loopback interface of 172.16.255.1. On the right side I have a Cisco ASA 5505 9.1. the issue is the ...
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1answer
60 views

User can access Windows based Apache sites but not linux Apache server over site-to-site VPN

I have a user (Win 7 Pro 64-bit) in a satellite office (10.1.0.0/24) that is trying to access web services in our main office (10.0.0.0/16) over a site-to-site VPN between a a Meraki MX60W and a ...
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1answer
287 views

Openswan is not sending packets on new ip after DPD

I have configured tunnel with DDNS. After appliance get rebooted the other side is not sending packets on new ip-address (even i have set dpdaction=restart). I am using openswan 2.6.38. Here is my ...
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1answer
187 views

Strongswan with X.509 authentication and LDAP authorization

I would like to setup Strongswan/Libreswan with PKI authentication. Now I have searched and found only how to configure specific accepted client certificates like here: ...
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151 views

How to set up ipsec esp tunnel between two linux host machine using ip xfrm

I have created a ESP tunnel using ip xfrm command between two linux machine such that if I ping from one machine to other then I am seeing ESP packets. Now what I am trying to do is that I have three ...
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58 views

VPN Tunnel set up Issues - Cisco WRVS 4400N to Server 2008 R2behind ASA5505

I was wondering if someone could help with a scenario i have that i am not sure how to set up regarding a VPN tunnel set up. I have a Cisco WRVS4400N business router , and on this device , i need to ...
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229 views

Cannot connect to VPN on Server 2012

We run a small business and have a server that runs our VPN on Windows Server 2012. Our VPN was working fine until we restarted our router and it seems that restart procedure broke the VPN. We are ...
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346 views

Is it possible to configure L2TP IPSec connection on a Fortigate 30D?

We've got a FortiGate-30D running v5.0,build4225,130521 (GA). I've managed to configure Cisco IPsec VPN and Web-SSL, and tested both, but I'm unable to configure the L2TP IPSec VPN. Looking at the ...
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55 views

Is using EAP-MD5 in strongSwan a security risk?

Quoting Wikipedia: It offers minimal security; the MD5 hash function is vulnerable to dictionary attacks, and does not support key generation, which makes it unsuitable for use with dynamic WEP, ...
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148 views

IPSec on Domain Controllers and Trusted Domains

I am looking at configuring IPSec as follows: Isolation Request authentication for inbound and outbound connections Computer and user (Kerberos V5) I am looking to do a blanket deployment across ...
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78 views

Testing IPsec with Nagios / Icinga?

Several of my Windows servers are running IPsec. There are a small handful that have problems when rebooting with the IPsec services not coming up. As a result I'd like to set up a monitoring check ...
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110 views

Linux IPSec between Amazon EC2 instances on same subnet

I have a requirement to secure all communications between our Linux instances on Amazon EC2 - we need to treat the EC2 network as compromised and therefore want to protect the data that's being ...
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216 views

OpenSwan VPN Connected but can't ping or connect to anything on right side

On my end is an Ubuntu AWS EC2 VM and on the other end is a Cisco ASA 5500 router. Phase 1 and Phase 2 come up but I cannot access anything on the other end. It would seem there's a routing problem, ...