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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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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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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253 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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4answers
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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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276 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
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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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1answer
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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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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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661 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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2answers
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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
280 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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402 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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3k 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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67 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
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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
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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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135 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
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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
678 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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193 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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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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847 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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160 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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421 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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206 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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312 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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1answer
155 views

How is my GRE-Tunneled packet being routed? [closed]

I'm trying to figure out exactly what is happening when I create a GRE tunnel. My network looks like this (-> means directly connected): Computer A (eth0: 10.0.1.1) -> (eth0: 10.0.1.2) Router B ...
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1answer
68 views

Should we accomodate a customer asking us to NAT servers behind new PUBLIC IPs within a VPN?

We're a SaaS provider, setting up a IPSec VPN between our data center and a customer's site so they can directly access their hosted database server from their LAN. Instead of exposing our internal ...
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219 views

Site-to-Site VPN not connecting with Cisco 877

I can't seem to get the VPN connection going with my 877. I have an old IOS (12.4) but it looks to me like all the pieces are there. I have compared this config against the Azure-provided (albeit ...
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strongSwan setup where both sides are behind NAT

I'm trying to setup a strongSwan server in my home and connect to it from another network. Let's say sun is the VPN server and venus is the client. Both sun and venus are behind NAT networks. sun is ...
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302 views

EAP password prompt in strongSwan

I'm trying to setup a host-host configuration using strongSwan. I did manage to set it up using certificates and now I wish to set it up using certificates + EAP authentication. I mixed this ...
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Is it possible for L2TP VPN to do auto route configuration for client during connected?

We've setup a L2TP VPN server with this tutorial, everything works like a charm. The only issue is We don't want client to route all traffic using this VPN, only a particular subnet, e.g. ...
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637 views

Site to site IPSec VPN between Server 2012 and USG 50

I am looking to setup an IPSec VPN server in our organisation using a Windows server 2012 machine with remote access and routing installed. I would then like to perform a site to site IPSec VPN ...
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391 views

Debugging IPSEC log

A Fortigate unit and a Openswan based Linux server. Tunnel is up but no data goes through. This is the log from the Forti unit: Line 204: ike 0:Brazil_VPN:2803378:19809969: responder received first ...
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422 views

Issues with StrongSwan on FreeBSD 10.0. Charon refuses to start

The charon.log with full debug levels (4) is as follows: Jan 21 16:09:47 00[DMN] Starting IKE charon daemon (strongSwan 5.0.4, FreeBSD 10.0-RELEASE, amd64) Jan 21 16:09:47 00[LIB] plugin 'aes': ...
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Is secure pptp not possible on Ubuntu?

From [1], it was said that 1) All users and providers of PPTP VPN solutions should immediately start migrating to a different VPN protocol. PPTP traffic should be considered ...
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880 views

Fortigate VPN can't reach site

I've two Fortigate's here and I use one of them for each site. Site A Site B 192.168.2.0/24 <---------- VPN ...
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Windows server 2003 ipsec error

I have a Windows Server 2003 domain controller and a bunch of clients. Something happened and now IPSec service fails on the server. After IPSec fails to start, all TCP/IP traffic is blocked to the ...
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1answer
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Cisco IPSEC VPN Slow Speeds

We have a site to site IPSEC VPN, both endpoints are Cisco PIX 515e's. The links at both end are 100mb, however speeds over the VPN (logged using jperf) are at most 4mb. Obviously this represents a ...
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Cisco IPSec Hardware Requirements

In order to use IPSec on 2811 and 2651XM Cisco routers, does one need any particular hardware module(s) or just the appropriate software?
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How Can You Tell If IPSec Is Installed on Cisco

How can I tell if my Cisco router has IPSec installed? I went into configuration mode to see about setting up a crypto policy, but the 'crypto' keyword isn't available. Is this an indication that it ...
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1answer
551 views

Routing Strategy for Multiple VPCs on AWS

I am planning to setup multiple Virtual Private Clouds (VPC) on AWS. These VPCs will be located in different geos. Each VPC will have public as well as private instances. I need to incorporate an ...
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165 views

Limit Privoxy access with iptables to IP range

I would like to limit the access of the Privoxy port to a selected IP range. Background: I'm using an IPSec-VPN which users get 10.0.0.0/8 addresses assigned and only those users should be able to use ...
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VLAN over VPN (ASA 5520)? if not any other options available?

Is it possible to extend the local VLANs to a Remote site connected by IPSEC VPN using ASA 5520 / Cisco 1841 DSL router. can we have many VPN tunnels between the ASAs? (from every VLAN one vpn ...
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477 views

Locked out of RDP access to web server - how to stop IPsec Policy Agent?

An ipsec filter rule was deleted in error that has now locked me out of RDP access to the server - very big problem (this is a Windows Web Server 2008 R2 (64-bit) rented from 1&1). I can connect ...
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615 views

Site-to-Site VPN from Windows Azure to Cyberoam CR25iNG

I'm trying to configure Site-to-Site VPN between Windows Azure and on Premise network using Cyberoam CR25iNG UTM Firewall The Local Network Subnet is 192.168.0.1/20 (192.168.0.0 - 192.168.15.255) ...
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424 views

DNSSEC and IPSec DNS Server and DNS Client Configuration

I'm about to deploy DNSSEC for some of my domains and as I was getting ready I did some reading on the subject. I came across some Microsoft Technet articles talking about Name Resolution Policy Table ...
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657 views

l2tp vpn is disconnected after few minutes

I installed IPSec/L2TP on my vps server. I tried to connect from my mac to this VPN server. First time, connection is succeeded. But after a few minutes, connection was broken by itself. After ...
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IPSec tunnel on ASA keeps disconnecting

I have an ASA IPSec tunnel configured between an ASA5505 and Microsoft TMG 2010 SP2. The tunnel sometimes works for a few hours, and then disconnects, and other times it works for 5 minutes and then ...
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L2TP/IPsec through HTTP Port 80

i got an VPN (L2TP/IPsec) Tunnel running on my synology nas. my router is configured for vpn passthrough. so everything is fine. furthermore i got an webservice running on port 80. now i got the ...