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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Reach non existing AWS VPC subnet from IPSec tunnel

So here is my setup: VPC: 172.16.0.0/16 Subnet 1: 172.16.1.0/24 openvpn server: eth0: 172.16.1.10 tun0: 172.17.0.1 ovpn client 1: 172.17.0.6 ovpn client 2: 172.17.0.10 IPSec VPN is using ...
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2 views

ClearOS OpenSwan to Linksys RV042 VPN not encapsulating packets

I have a big problem which prevents our IP Phones to be working properly for a week now; Our old DFL-210 fried during an electrical event. It was doing an IPSec VPN with our remote site via their ...
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15 views

How to configure strongswan to support iOS mobile devices?

I'm trying to configure strongswan server to support iPhones and iPads. I'm using client certificate for authentication, I have the following configuration for iOS in strongswan.conf : conn iOS ...
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15 views

Domain controller not allowing me to connect to it over IPSec tunnel

I'm trying to connect a Windows 7 computer to a domain controller over an IPSec tunnel. The tunnel has formed and the network is accessible. I have set the IPSec connection to use the windows domain ...
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1answer
21 views

Can I have an alert when a IPSEC is down in Fortigate 80C?

We have a fortigate 80c and 60D with an IPSEC VPN . Is there a way to use the log (or other tool) to send an email alert when the tunnel is down? I couldn't see anything on the Log & Report tab
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High Availability Solution for an ipsec gateway [closed]

We are currently looking for a high available ipsec vpn gateway which allows us to do stateful failovers. Since we do not control the remote gateways we are very limited regarding configuration ...
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10 views

Tagged traffic over Checkpoint IPSec

How can I forward tagged traffic over Checkpoint IPSec? Where I can read more info about it? I have Checkpoint R76 and I need to use tagged vlan over IPSec tunnel.
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1answer
24 views

IP Addresses over IPSec

I've got four hosts setup as follows: I've got an IPSec tunnel via OpenSwan over the internet between Servers B and C. Servers A and D are configured to route traffic to the other via B and C ...
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45 views

Not going traffic through tunnel between Cisco ASA and Openswan [closed]

I have two offices. In office_A the gateway is Debian 6 with installed Openswan. He have several external IP x.x.171.234 - 238 on eth1 and internal VLANS on eth0. In the second VLAN network is ...
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11 views

Issue with SNAT and IPsec

Hi I am having issues with an IPsec connection I have, the connection is established this is the output of ipsec whack --status 000 #17: "connection/0x1":500 STATE_QUICK_I2 (sent QI2, IPsec SA ...
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25 views

Which is better, strongswan, openswan, or IPSec-tools? [duplicate]

I'm looking for an IPSec solution that will run on CentOS 6. There seems to be a lot of competing viewpoints on this so it is hard for me right now to know which one I should look into. Which do you ...
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24 views

IPsec - strange behavior

I have set up site-to-site ipsec connection between linux(debian) and mikrotik router. The tunnel is up linux configuration: config setup interfaces=%defaultroute keep_alive=60 ...
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1answer
38 views

Why are only 3 ip xfrm policies needed for a IPsec tunnel?

I have a site-to-site IPsec tunnel up and running between a strongswan (v5.2.0) instance (site A) and a RouterOS router (site B). Everything works fine, the hosts in the two private subnets setup for ...
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1answer
79 views

Security risks of using Google DNS to resolve names on a private net (192.168.x.x)?

Are there any known risks associated with using a public DNS versus a DNS which we or our partners control? Our solution involves a few embedded devices so using Google DNS would give us a degree of ...
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1answer
31 views

Does a site-to-site IPSEC vpn need an always on connection?

Does a site-to-site IPSEC vpn needs an always on connection/tunnel with keepalives or is it possible to only encrypts packets when needed (when it matches a route or something like that)?
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18 views

Ipsec right side multiple ip's and phases lifetimes

This is my setup for ipsec: conn outside_company authby=secret ike=aes256-sha1;dh2 phase2=esp phase2alg=aes256-sha1;dh2 pfs=yes keyingtries=3 ikelifetime=24h ...
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30 views

vpnc: no response from target

I have not be able to for a tunnel using vpnc or shrew soft to my pfsense box running IPSec. I have made sure that the correct ports are open, the user I'm trying to log in has the correct permissions ...
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1answer
49 views

Cisco 2901 - IPSec VPN Maxing CPU

We have a Cisco 2901 on the edge of a 100Mbps/100Mbps WAN link which is providing an endpoint for an IPSec VPN to a Juniper SSG 550M. The problem is that we are seeing a max of 'only' 40Mbps over the ...
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1answer
52 views

FreeBSD L2TP VPN connection error

I have a L2TP/IPsec VPN server on FreeBSD 10 set as this article. Everything works fine except clients cannot receive packets from outside. Here is the tcpdump result when a connected client tries to ...
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39 views

Creating redundant IPSec connections using OpenSwan

I have a linux (netkey) instance with openswan installed, the instance has two connection to the same IPSec peer that needs to act as redundant connections. both connections' properties are the same ...
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2answers
50 views

Allow only IPSEC outgoing traffic to a port (using IPTABLE?)

Problem: I've a situation where IPSEC server and the target server (Say http server) happens to be the same machine and I need allow ONLY the traffic coming through IPSEC server to have access to a ...
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83 views

Shorewall: DNAT to IPSEC tunnel zone not routing correctly

I have a ipsec tunnel working that gives access to a 192.168.4.0/24 lan. It is working fine and I can access hosts on the other side without problem: # from fw and lan hosts: # ping 192.168.4.44 PING ...
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24 views

Openswan not updating the routing table

I have problems to find solution about this. I have Openswan and ASA configure IPSec VPN tunnel and the connections is established and working but with some little problems. The topology is looking ...
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89 views

IPSEC VPN with same remote peer IP - Only 1 remote connection at a time

I am using a Mikrotik router to connect multiple road warriors (Avaya phones) with IPSEC VPN behind the same WAN address. The first phone connects fine, when the second phone connects the first phone ...
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132 views

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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1answer
33 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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1answer
67 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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67 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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80 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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1answer
938 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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66 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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272 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
266 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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28 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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723 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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2answers
341 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
250 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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2answers
267 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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2answers
237 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
35 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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134 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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0answers
638 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 ...
0
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1answer
302 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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77 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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78 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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2answers
713 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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158 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
287 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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1answer
225 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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1answer
663 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 ...