VPN is the acronym for Virtual Private Network - a network type that uses a the Internet to provide remote networks or single machines with secure access to their organization's network avoiding expensive leased lines.

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30
votes
4answers
42k views

Should I use tap or tun for openvpn?

What are the differences between using dev tap and dev tun for openvpn? I know the different modes cannot inter-operate. What is the technical differences, other then just layer 2 vs 3 operation. ...
18
votes
5answers
12k views

How to set up a VPN Incoming connection with Windows to tunnel Internet traffic?

I want to set up a VPN on a remote server to route all my Internet traffic for privacy reasons. I can set up an incoming connection and connect to it successfully. The problem is, I can just see the ...
17
votes
6answers
21k views

Connect an iPhone to OpenVPN

Is there any way to connect an iPhone to our company OpenVPN server?
15
votes
1answer
30k views

How to set up strongswan or openswan for pure IPSEC with iPhone client?

I'm having trouble finding concrete, up-to-date information for how to set up strongswan or openswan to be used by the iphone's VPN client. My server is behind a budget linksys NAT router. I found ...
15
votes
2answers
7k views

How to start setting up a VPN server for smart phone clients?

I have a Ubuntu Lucid Lynx VM which I've been tinkering with. I want to set up a VPN and I am happy to learn how to do it on my own but the vastness of options makes my head spin, so I'm just looking ...
14
votes
2answers
3k views

When would you use MPLS?

After having just spent months setting up a fairly complex VPN, I'm beginning to look at alternatives for the future. Some of my network providers use MPLS to connect to us, and I suppose it works ...
14
votes
6answers
12k views

How do you avoid network conflict with VPN internal networks?

While there's a wide variety of private non-routable networks across 192.168/16 or even 10/8, sometimes in being thoughtful of potential conflict, it still occurs. For example, I set up an ...
12
votes
5answers
6k views

Windows SSH Tunnel Manager

What application do you use on windows to create SSH tunnels On Linux I use gSTM, and on OSX I have used STM, but I am not able to find any similar free tools on windows. I don't want to use putty, ...
12
votes
4answers
23k views

VPN client connect/disconnect via command line in XP

In an XP Pro workstation, is there a way to start the native Windows VPN client and open/close a connection from the command line so it can be scripted in a batch file?
12
votes
3answers
1k views

Can you recommend a good intro to iptables?

I have to setup a firewall on a Linux server (all my previous experience is with Windows). My rules are meant to be pretty simple - forbid all, allow some ports with all, allow some ports for specific ...
11
votes
5answers
8k views

Security of PPTP vs IPSec

Is PPTP or IPSEC VPN more secure than the other for 'dial in' VPN, if so, why?
11
votes
3answers
4k views

Linux solution for VPN on-demand for iOS devices

According to Apple’s support article on VPN for iOS, only Cisco IPSec, Juniper Junos Pulse, and Cisco AnyConnect support the VPN on-demand feature. Are there any open-source implementation (‘free’ as ...
11
votes
4answers
5k views

Hyper-V Cut-n-Paste

I use Hyper-V on a development machine for multiple reasons and one of my biggest annoyances is that I can't cut and paste to/from the virtual machines. I've been through all the options and can't ...
11
votes
2answers
742 views

What's the protocol-level difference between IPSec and “Cisco IPSec”?

Most VPN clients distinguish between IPSec and "Cisco IPSec." For example, (Apple's) iOS treats them as essentially separate things. But I can't find any explanation of what the protocol-level ...
10
votes
2answers
244 views

Should the virtualization host be allowed to run any service?

I recently setup a virtualization server for the small company I'm running. This server runs few virtual machines that are used for development, testing, etc... My business partner works from a ...
10
votes
2answers
14k views

Windows Advanced Firewall: What does “Edge Traversal” mean?

this should be a really simple one: In Advanced Windows Firewall on Windows Server 2008+, Properties > Advanced, what does "Edge Traversal" mean? I Googled it, of course, and was unable to come up ...
10
votes
2answers
238 views

Traffic routing with unreliable connections

I have a group of offices that are all connected to the main office via DSL links on the far end to save costs. (We're a non-profit, don't ask) We've historically had noticeable problems with the ...
10
votes
2answers
408 views

Integrating external computer into a domain - some recommendations please

Given: A multi location company. Every office has local routers that connect to a central VPN capable router in a data center. All fine so far. We now need to move a computer off site into a ...
9
votes
10answers
5k views

Basic firewall, switch, & router device? [closed]

I am a developer and haven't dealt with server admin or networking in years, so "rusty" is very generous. I am setting up a new web server cluster (starting with two 1U web servers and one DB server). ...
9
votes
2answers
3k views

Free SSL VPN client

What is the best free SSL VPN client that works on 64 and 32 bit windows clients?
9
votes
1answer
22k views

LDAP authentication for SonicWALL VPN

I'm trying to configure my SonicWALL to allow LDAP authentication for VPN users. I've done this before with another device, and I remember it being pretty simple. But I can't get it to work this ...
9
votes
6answers
12k views

Checkpoint VPN Linux Client

Is there a Linux client for Checkpoint VPN? Preferably for Ubuntu? -- Rubem
9
votes
2answers
1k views

Setup VPN issue on Ubuntu Server 12.04

I have a problem with setup VPN server on my Ubuntu VPS, here is my server environments: Ubuntu Server 12.04 x86_64 xl2tpd 1.3.1+dfsg-1 pppd 2.4.5-5ubuntu1 openswan 1:2.6.38-1~precise1 After ...
8
votes
1answer
224 views

If IPSec has its own IP tunnel support why do some add LT2P to the stack?

I understand that you can use IPSec to tunnel data securely. According to the Wikipedia page and a few other sources it can also tunnel IP packets and then route them through an interface. That would ...
7
votes
3answers
838 views

telnet counterpart for UDP

Is there anything that enables a "telnet-like" functionality for UDP? I know the difference between TCP and UDP, and why telnet itself won't work - but I'm wondering if there is something similar to ...
7
votes
6answers
3k views

VPN Solutions for Linux server and Windows, Linux, and OSX clients?

I'm wondering what would be the best vpn solution for a linux server with windows, linux, and osx clients. I'm currently using openvpn but I find it difficult to set up and the windows client has ...
7
votes
6answers
5k views

Cisco VPN Client for Windows

is there any Free Cisco VPN Client software for Windows ?
7
votes
5answers
4k views

What is TLS and how does it compare to SSL?

Is TLS the "new" version of SSL? What features does it add, or security issues does it address? Can anything that supports SSL support TLS? What would be involved in making the switch? Is the ...
7
votes
2answers
4k views

Is the Windows VPN secure?

I have used a few VPN solutions over the years. Most are hard to set up, slow to connect and/or rather ill-behaved (replacing system drivers, disrupting each other etc). One solution I have never ...
7
votes
3answers
13k views

OpenVPN and DNS. How to?

I'm using OpenVPN to set up a VPN to connect my laptop at home to my workplace LAN. I want to be able to refer my workplace computers by their name and not by their IP but I can't. This is my ...
7
votes
8answers
8k views

Alternative Cisco VPN clients for Windows XP

I'm considering investing in a Cisco ASA5505. As Cisco's own VPN client requires a service subscription, which I am trying to do without, are there any free or low-cost ipsec VPN clients that will ...
7
votes
7answers
88k views

How to resolve a “driver failure” error in the Cisco VPN client connecting from a Windows 7 client

I have recently upgraded my laptop from Windows Vista SP1 to Windows 7 Professional. After the upgrade, if I try to use the Cisco VPN client to connect to a network, I get this message: Secure VPN ...
7
votes
1answer
243 views

OpenVPN Client timing out

I recently installed OpenVPN on my Ubuntu VPS. Whenenver I try to connect to it, I can establish a connection just fine. However, everything I try to connect to times out. If I try to ping ...
7
votes
2answers
2k views

IPSec VPN between Amazon VPC and Linux Server

I'm trying to set up an IPSec VPN connection between our corporate network and Amazon's Virtual Private Cloud, using their VPN system and a Linux server. Unfortunately, the only guide I've found ...
7
votes
2answers
2k views

Openvpn for client/server in same subnet

I'm trying to openvpn into an office network (192.168.1.0/24) from a client sitting on a network with the same subnet (also 192.168.1.0/24). It is a linux (ubuntu 9.10) server and windows client. I ...
7
votes
2answers
16k views

Connect to Cisco ASA 8.2 VPN with Android 2.1 L2TP/IPsec?

I am trying to configure my Cisco ASA 5510 running software version 8.2 to allow my Droid X to connect via L2TP/IPSec VPN. I have configured the DefaultRAGroup like so: tunnel-group DefaultRAGroup ...
6
votes
9answers
2k views

Need prosumer router/firewall/vpn/vlan/nat advice [closed]

Looking for a recommendation on a device (or devices I guess) to do router/firewall/vpn/vlan/nat functons for my home network. Right now, I'm doing this with an IPCop box, but I'd prefer a little ...
6
votes
7answers
10k views

Is it possible to use VPN for only one Program?

Is it possible to use VPN connection for only one program and the rest of the traffic go through the local network? More specifically, I am using the Official Cisco Client.
6
votes
5answers
45k views

Is there a Windows 7 compatible IPSec VPN client that allows protocol and port specific rules?

I'm looking for a Windows 7 compatible IPSec VPN client that allows protocol and port specific rules as well as an aggressive mode. On Windows XP and Vista we've used SafeNet SoftRemote in which you ...
6
votes
2answers
2k views

Windows Authentication behaves oddly when VPN'd

We've got a few apps that rely on windows authentication - a couple of web apps with AD auth turned on and we usually connect to our SQL servers with windows auth. This normally runs without a hitch. ...
6
votes
2answers
1k views

VPN endpoint for my IPhone?

For my company I need to setup a VPN endpoint so that my users can securely login to my network. Can anyone recommend a good server side software product/solution that can allow my Iphones to ...
6
votes
4answers
3k views

How to automatically assign a route to client in Windows Server PPTP VPN?

Is there a way to configure PPTP VPN on Windows Server which automatically tells the client to add a route for the private network? I have to do it manually on every PC (once) using following command ...
6
votes
2answers
14k views

L2TP client for Ubuntu

It's easy enough to get a pptp client going on a Ubuntu 9.04 (Jaunty) desktop: sudo apt-get install network-manager-pptp However, I can't seem to find documentation find a corresponding L2TP ...
6
votes
1answer
575 views

RODC and remote site

I have a two-site domain (call them Local and Remote). Site Local has our main IT infrastructure, including two Active Directory Domain Controllers (2008R2). We're trying to set up an RODC at site ...
6
votes
2answers
389 views

What is the best way to secure remote server/tool access from many locations?

I have a number of remote servers I lock down by restricting SSH to specific IPs. Equally, our internal customer admin tools are also locked down by IP. This is fine when working from the office but ...
5
votes
7answers
41k views

How to setup VPN on home network [closed]

I am a software developer. I travel and sometimes have a need to access my files at home and tweak other family members computers. I would like to connect to my home network via VPN and then RDP ...
5
votes
6answers
2k views

Cheap and easy solution for VPN?

I would like to access my office-network from remote via VPN. My router is a Zyxel Prestige 600, and from what I have been able to google, does not support VPN in itself. What would be a cheap and ...
5
votes
4answers
1k views

What is the best VPN technology to implement in a SOHO setting? [closed]

Most firewalls/VPN appliances today allow you to select one of the various tunneling technologies available. The most popular are IPSEC and PPTP, although I've heard good things about OpenVPN. Is ...
5
votes
8answers
6k views

VPN within a Remote Desktop session

I connect to a server on my local network via Remote Desktop. I then need to make a VPN connection out to the internet from within that Remote Desktop session. However that immediately disconnects my ...
5
votes
4answers
11k views

Connect to Linux-based VPN Using Windows 7's Native VPN Connection Wizard?

Does anyone know if I can run a Linux-based VPN server on my Ubuntu server and connect to it using Windows 7’s native VPN connection wizard? If this is possible, which VPN server should I use? ...