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

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17
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2answers
25k views

Cisco IPsec versus L2TP/IPsec

I have a VPN service which gives me the option of connecting via PPTP, Cisco IPsec, or L2TP over IPsec. PPTP i know is inferior in terms of security and encryption, but I'm not really sure what the ...
6
votes
3answers
4k views

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 ...
4
votes
1answer
5k views

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 ...
3
votes
1answer
3k views

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 ...
3
votes
1answer
212 views

VPN for Home to watch TV on the go

My ISP offers TV on tablets, phones, etc. where I have to use an app, but I still have to have that traffic flow through my modem. What would be the best solution to setting up a VPN for probably just ...
3
votes
0answers
2k views

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 ...
2
votes
3answers
783 views

IPv6 and IPSec - why do I need an external daemon?

I read that IPSec is mandatory for IPv6 implementations. Does this mean that it should be handled by the OS and that IPSec configuration should be mandatory for IPv6 to work? If so, why is this not ...
2
votes
1answer
330 views

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 ...
2
votes
1answer
2k views

IPSec-Tools build on Ubuntu

I am trying to build ipsec-tools package from http://ipsec-tools.sourceforge.net/ on Ubuntu PC. I build the package with: $ ./autoreconf --force --install $ ./bootstrap $ ./configure ...
2
votes
3answers
1k views

Windows 7 RTM IPSec VPN

I'm running Windows 7 Ultimate RTM 64Bit and need an IPSec VPN client, I've tried Shrew VPN but that caused a BSOD. I've noticed there is a VPN option in the start menu but I'm not sure if it is ...
2
votes
1answer
364 views

Relation of IPSec and IPv6 to SSL/TLS

My understanding is that IPSec is a security layer added inside the IP protocol to make IP itself a secure transport. My understanding of IPv6 is that it is the newest version of IP that will (for ...
2
votes
1answer
3k views

Finally get my win 7 connected to strongSwan VPN, but there's no Internet

I believe I've followed all the instructions, and my win 7 did get connected, but there's no Internet. Background: Server OS: ubuntu 12.04 on linode xen VPS strongSwan Version: 4.6.4 ...
2
votes
2answers
3k views

How to connect to an IPSec VPN through a LinkSys WRT54GL?

I am having trouble connecting to a L2TP IPSec VPN when I use my wireless router. I have a LinkSys WRT54GL v1.1 wireless router with the most current version of tomato (1.28). I have no issues ...
2
votes
1answer
142 views

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 ...
2
votes
0answers
566 views

How can I set an IPsec ID using the Windows 8 built-in VPN client?

I'm trying to connect to a VPN using the built in Windows 8 VPN client. The VPN uses L2TP/IPsec and a pre-shared key. I can see it's connecting to the VPN but not making it through authentication. I ...
2
votes
1answer
3k views

Find the IPsec ID and Secret id for my vpn connection

Hi i'm using ubuntu and new to cisco vpn anyconnect client. I have installed it successfully and establish the connection by giving the user name and password. But it is showing the timeout error. So ...
2
votes
0answers
146 views

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. ...
2
votes
0answers
529 views

Cisco RV180 ipsec vpn to mac os x 10.8.2 default client Configuration

I would like to configure an IPSec VPN tunnel between my RV180 (server, last firmware) and my Mac OSX 10.8.2 laptop. I have little knowledge about VPN, and a bit more about network in general. I have ...
2
votes
1answer
555 views

Is it possible to set up IPSec on a linux virtual machine host to connect to an Azure virtual network

We run some virtual machines in an onsite Ubuntu based server with guests being a mixture of Windows Server and Ubuntu. We're also setting up some Windows Azure virtual machines and ideally would like ...
1
vote
4answers
13k views

Connecting to a Checkpoint VPN-1 from Snow Leopard?

Checkpoint SecureClient doesn't work with Snow Leopard, so I've been looking for some other options. VPN Tracker appears to work, but lacks username/password (XAUTH RSA) authentication support (PSK ...
1
vote
1answer
129 views

Is Windows IPsec really needed when using a 3-rd party Firewall?

I have installed COMODO Firewall and I have some knowledge about internet security and i set up my firewall rules so my computer is protected enough (that really doesn't matter in current context). ...
1
vote
1answer
831 views

Why is xl2tpd / pppd adding a route for 192.0.0.0/8 after bringing up the link?

I am establishing an l2tp connection with IPSEC between two hosts and when the link comes up a route is added on the client side for 192/8 pointing out the newly established ppp interface. I can find ...
1
vote
2answers
592 views

How often is IPsec used in IPV4 networks?

If I disable it on my computer will I lose anything?
1
vote
4answers
825 views

Tor over IPSEC or IPSEC over Tor? [closed]

Do you think Tor should be run over IPsec, or IPsec over Tor? Please be specific as of why you made this decision.
1
vote
1answer
733 views

How do I configure a Netgear FVS336g for use with Amazon VPC?

I think it should be possible to create an IPSec tunnel between a Netgear FVS336Gv2 firewall/router and AWS VPC however, I've been unable after several tries. How do I setup a connection for a Amazon ...
1
vote
1answer
235 views

OS X: how to figure out what prevents L2TP/IPSec from running correctly

It seems that an old installation of Cisco Anyconnect prevents the OS X built-in L2TP/IPSec client from running (I posted a question here: OS X 10.7, can't log into any L2TP VPN server, but didn't ...
1
vote
1answer
636 views

Can IPSec (or any other VPN tunnel) hide your IP address while browsing?

Is there a VPN/tunnelling method which you can use to browse the web, but will also prevent somebody from seeing your IP address if they were sniffing the network? I wasn't sure if the IP address ...
1
vote
1answer
238 views

VPN back to home network for secure IP traffic?

I'd like to set up a VPN running somewhere on my home network that would enable me to securely tunnel all Internet traffic through it from an untrusted network. That way, I could browse sensitive ...
1
vote
0answers
44 views

Route all traffic through IPSEC tunnel

I'm using Strongswan on CentOS as IPSEC VPN server. Is possible to tell client (win7) to route all traffic through tunnel interface after tunnel is up? Here is my ipsec.conf config setup conn ...
1
vote
0answers
153 views

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 ...
1
vote
2answers
2k views

ipsec configuration problems on Ubuntu. Errors on IP forwarding" connection authorization from Android client

I'm trying to create a L2TP/IPSec PSK VPN from my Android phone to my Ubuntu server on my home network. I am receiving two errors. the first one is a failure checking IP forwarding when I run ipsec ...
1
vote
1answer
759 views

IPSec with or without L2TP?

I'm referring to this question. And to be clear: This is really not about the old PPTP vs L2TP debate. ;-) I successfully set up racoon as an IKE server without any L2TP implementation running and it ...
1
vote
3answers
3k views

IPsec VPN connection drops automatically every 47 mins

I'm using Cisco Systems VPN Client Version 5.0.07.0440 on Windows 7 Ultimate 64-bit to connect to a VPN server through IPSec/UDP. The problem is each time when it connects, I always get warnings in ...
1
vote
0answers
103 views

Netgear NAT over LAN TO LAN

I have the following question: I need to connect through a vpn IPsec lan 2 lan tunnel with a partner but they want that I connect through a specific ip subnet which is not mine. Here's the situation: ...
1
vote
0answers
212 views

M0n0wall IPsec tunnel fails after switch to PPPoE

I have had a M0n0wall site-to-site IPsec VPN working for several months on a static IP via an ADSL router. We've just switched to a fibre (FTTC) connection, and M0n0wall has now been configured to ...
1
vote
1answer
1k views

How to stop split tunnelling over cisco VPN (OS X)?

I'm using OS X (Snow Leopard) and the built in Cisco IP Sec client to connect to my corporate VPN. Currently, everything works as designed, and desired for most people. However, I would like to be ...
1
vote
0answers
514 views

Shrew Soft VPN Client - Negotiation timout

I am having an issue running Shrew Soft VPN Client on Windows 7 Pro x64. While trying to resolve this issue I have disabled miniport adapters like a lot of websites say to do however this hasn't ...
1
vote
1answer
1k views

Cisco ASA5505 site-to-site VPN doesn't establish tunnel to remote peer

The remote peer can start the tunnel successfully when accessing my local network like pinging a local host, however, the tunnel cannot be automatically started from the local side. The log shows no ...
1
vote
0answers
47 views

IP header “Option field”

Is it true that the GRE (Cisco tunnel) header is placed in the IP header "option field" ? Are the IPSec headers (ESP or AH) installed in the "option field" too ?
1
vote
0answers
673 views

PFsense OpenVPN traffic getting routed through WAN rather than IPsec tunnel

So I have a PFsense firewall setup with a IPsec tunnel created to access a special webpage housed at another companies website. Internal traffic routes properly through the IPsec tunnel for this ...
0
votes
2answers
54 views

Find out what routers are crossed when accessing a server!

I am new to this forum and not really sure if I this belongs here, but I give it a shot anyway. What routers/switches/networks does a packet from my computer need to cross in order to access a lets ...
0
votes
2answers
2k views

Can't connect to pc using Remote Desktop over VPN with Domain user account only

Craziest thing. I can't seem to login to my pc at work using my domain credentials. I am using Remote Desktop with a Cisco VPN and have tried both Mac and Win 7 remote machines. It appears that I can ...
0
votes
1answer
686 views

How is it possible that I can't login to various websites when using a VPN at a public Wi-Fi? That same VPN is just fine when connected from home

This is a full IPSec tunnel provided by my university. I use this VPN at home and at public Wi-Fi cafés. For some reason, I am not able to login to most websites while using the VPN at this specific ...
0
votes
1answer
2k views

Allow all websites for administrator account and block all websites (but a few) for limited accounts

At my work we have a PC which runs Windows XP and is used by all employees. This PC is mainly used for our company website: a trailer booking website. At the moment there is one account: an ...
0
votes
1answer
1k views

Openswan L2TP/IPsec VPN for iPhone fails during connection

I spent the morning trying to configure an L2TP/IPsec VPN using Openswan and xl2tpd on a Debian Squeeze server for use by a mix of iOS and Mac clients. I am trying to set it up using pre-shared keys ...
0
votes
2answers
114 views

IPsec counter mode - are there implementations?

Counter mode encryption is potentially more robust against lost packets. It is used in SRTP. I assume that if I use counter mode, a lost packet causes a lost UDP packet or TCP retransmission instead ...
0
votes
3answers
373 views

Something regarding internet browsing using an IPSec VPN?

Something is causing me a real headache: If my workplace offered a wireless internet connection, at the workplace, using VPN (assume it's IPSec for now). If I were to connect, I presume on the other ...
0
votes
1answer
807 views

Private IP address over IPSEC tunnel

I have two dedicated servers that I have configured to require AH and ESP between their (public) IP addresses and using racoon I've set up isakmp. The IPsec tunnel between them is working well - I ...
0
votes
1answer
1k views

will the left|rightfirewall option of StrongSwan open UDP 500/4500 and protocol number 50 on iptable?

I know the StrongSwan use UDP 500 and 4500 for IKE traffic and IP protocal number 50 for ESP packages. I am not sure the usage of left|rightfirewall ...
0
votes
0answers
15 views

Linux IPsec VPN w/ racoon: Routing traffic into the internet

I'm currently setting up a VPN for my iPad to use when I'm traveling. Here's some basic info (if you need more details, just leave a comment, I will extend the question with the details): An OpenVZ ...