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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Renting a IPv4 address block [closed]

I am building a lab network with about 10 virtual routers and 20 host machines (also virtualized) as a part of a school project. The aim is to demonstrate a wide range of IPv6 routing, deployment and ...
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3answers
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Tunneling all TCP and UDP traffic through a Server?

On a Linux or Windows system, how would it be possible to tunnel all TCP/UDP packets through a thirdparty server? What would one use, does it work with SOCKS5, OpenVPN or SSH?
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3answers
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Does Windows 7 VPN work with a Cisco ASA 5510

We have a Cisco ASA 5510 router and are trying to get a couple users setup for VPN access. They are running Windows 7 x64 at home and cannot install the VPN client we have for our router (it only ...
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3answers
2k views

What is difference between L2TP and PPTP?

I need a high performance VPN server, who can tell me the difference between L2TP and PPTP ?
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4answers
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Problems with SCP stalling during file copy over VPN

I have a series of files I need to copy via SCP over a VPN to a remote linux server each night. The files are not large, we're talking about tens of megabytes here, but the file copy almost always ...
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4answers
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How can I speed up file transfers over VPN?

Our VPN users experience very slow file transfers (50MB can take 20 minutes with a 20Mbps FiOS connection on each side). If the file is transferred over HTTP or FTP, it's just as fast as you expect. I ...
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1answer
307 views

Can my ISP know that I am connected through a VPN?

I have a general understanding of VPNs and how they work. However, I am not sure of how the initial request is seen by my ISP? For example say I am connected to an OpenVPN provider, what happens when ...
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6answers
14k views

Fortigate VPN client “Unable to logon to the server. Your username or password may not be properly configured for this connection. (-12)”

We're running a Fortigate 100D, and having some trouble with the SSL VPN via FortiClient. I installed FortiClient on an external Windows 7 PC a few days pack and the SSL VPN connected and worked. I ...
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3answers
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Is a cloud-based domain controller behind a VPN feasible?

I'm considering setting up a windows domain controller in MS Azure within an Azure virtual network. Goal is to be able to centrally manage GPs and users. Is this even feasible, since the client ...
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2answers
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OpenVPN DNS Fails to Resolve

I am connected to an OpenVPN server that is configured with the options to redirect the VPN as the default gateway and to push my internal DNS servers: push "dhcp-option DNS 192.168.1.2" push ...
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2answers
7k views

Connect to a Fortinet VPN with Ubuntu

I don't know a lot about VPNs but I'd like to connect to a Fortinet VPN with Ubuntu. I can connect on Windows using Forticlient just by entering the policy server (vpn.theserver.com) and then it asks ...
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2answers
6k views

How to make iPhone Cisco VPN client work with ASA with certificate authentication

I have an ASA that's providing IPsec VPN services using certificate authentication (no xauth, just the certs). It works perfectly with the Cisco IPsec VPN Client. Now I'm trying to let iPhones ...
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2answers
3k views

pptp (pon) fails when called via cron (debian) [solved]

I have a pptp VPN link dialing from my (debian) linux server here, to an ISA2003 server at a remote site. The internet connection at (both) ends is somewhat dodgy, so I have written a little script ...
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2answers
2k views

Differences between SSH's tunnels and OpenVPN

I discovered that recent OpenSSH has support for tun devices. When it comes to tunnels and VPNs, I always thought the main programme was OpenVPN. Are there any advantages to using SSH tunnels? What ...
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4answers
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P2P VPN: cross between Hamachi and OpenVPN

I recently started using OpenVPN. It is useful because you can securely connect many clients from different networks. However, when two clients communicate, they are not directly connected but they go ...
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5answers
2k views

SSH remote access vpn tunnel

I have two machines both running CentOS linux, one is public facing machine with a real ip address (foo). The other is at a client's site behind a very restrictive firewall and with no real ip and no ...
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1answer
1k views

What is the difference between Microsoft VPN and Cisco VPN

What is the difference between Microsoft VPN and Cisco VPN? Are they just separate implementations of the same protocol? I seem to remember hearing somewhere that they were not compatible with each ...
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1answer
360 views

High throughput meshed VPN to connect datacenter hosts

We're renting a number of hosts in a public datacenter. The datacenter does not offer private VLANs; all hosts receive one (or more) public IPv4/IPv6 addresses. The hosts come with very modern CPUs ...
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6answers
4k views

Free or very Cheap VPN server software with high concurrent users count [closed]

I'm hoping to implement a VPN whereby about 200 concurrent users can log in to briefly access my network. I had a look at OpenVPN and this seemed excellent, but was hoping that there would be a less ...
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1answer
3k views

Which ports to forward for a VPN server that sits behind a firewall?

Question pretty much says it all. From what I have found, it seems that port 1723 is the main port to forward, but I also see numerous references to others ports. The server that is hosting the VPN ...
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2answers
612 views

What should I use instead of MS-CHAP v2?

There's a new tool and service that makes it very easy to break MS-CHAP v2, which is used to secure VPNs. A good summary of the attach against MS-CHAP can be found at Ars Technica. Here's the way I ...
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2answers
265 views

remote network access to LAN devices - VPN/LAN

I have several energy meters (with a web server embedded) distributed in many buildings, all these sensors are connected to the local network so that can be accesed through a browser to see the real ...
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1answer
3k views

PPTP VPN iptables firewall issues csf

I am having a problem with iptables and a PPTP VPN, I have read related topics both on hear and online but still can't get it to work! I am trying to set up PPTP on an ubuntu server on our local ...
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1answer
2k views

Simplest possible VPN to Amazon EC2 instance

I have setup an EC2 instance (Windows Server 2008) that I will let different developers connect to. Since I want the connection to be secure I am trying to setup a VPN connection to that machine, but ...
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2answers
3k views

iOS/Mac-Compatible IPSec VPN Server on Ubuntu

I pay for a VPS from a Xen VPS host and the load on it is fairly light, so I'd like to run a VPN off of it. The configuration I'm shooting for is "roadwarrior"-style, as I'd like to use it to secure ...
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3answers
261 views

Optimal SVN server configuration for personal use

I have a desktop machine that is currently set up as an SVN server. Currently I have it set up to be accessible via http (using Apache), but only for the local network, as I wasn't confident in my ...
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2answers
2k views

Script logon to a 'Cisco' VPN in windows

I would like to sync my development database with actual data from the production databases on a regular basis (say, weekly). I already have the scripts to do this, and the amount of data is not huge. ...
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1answer
1k views

VPN server not responding, no indications of blocked traffic

I have a Mac OS X Server (10.9) machine running a L2TP/IPSec VPN server. Configuration appears to be fine, and the hostname of both the server and the VPN is set to a DynDNS hostname. The server is ...
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1answer
188 views

OpenVPN needs to change its port every time I use

I have a Linode VPS that I setup OpenVPN server on it. Since I'm in China we have to deal with the GFW (Great Firewall), so I use the VPN a lot. The weird part is, that every time I use it, I need to ...
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1answer
5k views

Strongswan vpn tunnel connected but the traffic is not routed through it

I have just set up a vpn tunnel site-to-site with strongswan (4.5). The tunnel looks fine and connected to the other side, but seems there is a problem routing traffic through the tunnel. Any idea? ...
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1answer
1k views

Nmap ping scan over a VPN tunnel return all hosts alive?

I'm curious as to why running an nmap -sP (ping scan) on a remote subnet linked via a Cisco site-to-site IPSec tunnel returns "host up" status for every IP in the range. [root@xt ~]# nmap -sP ...
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3answers
484 views

How can I ensure home VPN users don't save connection password?

We are using a PPTP VPN, on Windows RAS/Server 2003. We have users verify anti-virus patching, and then after verification grant access to the VPN. We don't use a CMAK applet, we just provide users ...
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2answers
1k views

Is there an SSTP (Secure Socket Tunneling Protocol) server available for Linux? [closed]

I'm interested in installing an SSTP VPN server on one of my Linux VPSes somehow, but as far as I can see there are only servers available built in to Windows Server. Is this correct or have I just ...
4
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1answer
204 views

Remote support via VPN without split tunnel

my title might not be very clear, but I'll explain my setup in more detail now. We have several customers (companies) that need to be remotely supported. At these customers we have servers running ...
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2answers
4k views

Mac OS X PPTP VPN issue ping: sendto: No buffer space available

The VPN connects successfully but after some time the connection is unusable (VPN is used as primary gateway). Ping would reveal: ping: sendto: No buffer space available This looks like the same ...
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2answers
292 views

Sharing a VPN connection among several servers with certain IP ranges

I have an OpenL2TP VPN instance running to a company providing me with connections to cellphone modems in the 10.4.2.0/24 private IP range. This server is on the same private network as three other ...
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2answers
409 views

Login-time quota for VPN users

I have configured Routing and Remote Access Service in Windows Server 2003 as the VPN server. VPN users are defined in Active Directory which is running on this server too. How i can configure the ...
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2answers
1k views

IPSec VPN on Vista

My company uses IPCop to configure it's VPN. We have an IPSec script that runs on Windows XP to open a connection using a security certificate for authentication. Microsoft totally changed things ...
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2answers
258 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
3k views

OpenVPN connection works but no gateway is assigned

i try to setup openvpn on a vps and I'm able to establish a connection to the server, but the gateway isn't assigned to the client. Here are my config files: client config: client dev tun proto ...
4
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3answers
1k views

pptpd not working externally on Ubuntu Server 11.10

I am trying to set up a pptpd vpn on our newly installed Ubuntu 11.10 64 bit server, but am not having success having a client connect via an iPhone to the VPN. Note that no clients have been able to ...
4
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1answer
280 views

How to handle OpenVPN client as a service, when the laptop is physically on the network already?

The Setup I've gotten OpenVPN working on our Windows XP laptops. Users are limited, so I went ahead and set OpenVPN client to run as a service, which is great anyway because that means they are on ...
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2answers
3k views

Windows 7 VPN Client Default IPsec Configuration?

I'd like to use the windows vpn client for client-site vpn to my linksys rv042. As far as I can tell, the windows VPN client doesn't provide a lot of flexibility in its IPsec settings. Assuming full ...
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2answers
3k views

Bridging VirtualBox over OpenVPN TAP adapter on Windows

I'm trying to configure a virtual machine (VirtualBox guest running Backtrack 4) with a bridged adapter over a VPN connection. The VPN is is hosted by the cybersecurity club at my university, and ...
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3answers
914 views

Home workers requiring simultaneous office VPN and local network access

I now have a large number of remote users that are using a Check Point Secure Client VPN connection into the office. These users also need access to network resources attached to their local ...
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2answers
2k views

How to connect MacOS X Snow Leopard to a Windows Server 2008 VPN?

My Windows PC can connect without problems to a Windows Server 2008 VPN at my office. Everything works. I set up the same VPN in my Mac with Snow Leopard. It connects, but I can't access any remote ...
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1answer
2k views

L2TP/IPSec from Windows 7 to ASA 5520

I am trying to setup L2TP/IPSec on our ASA5520 to support a fringe case for one of our developers. The Windows VPN subsystem apparently stores the kerberos or NTLM cookie for the login when you use ...
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4answers
2k views

Cisco ASA user authentication options - OpenID, public RSA sig, others?

My organization has a Cisco ASA 5510 which I have made act as a firewall/gateway for one of our offices. Most resources a remote user would come looking for exist inside. I've implemented the usual ...
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1answer
371 views

How do I setup a pentest lab for a univeristy? [closed]

I am working with a local univeristy which wants to teach students security. The modules involved using tools like Nmap and Metasploit on Windows and Linux boxes. However, as Windows has licensing ...
3
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2answers
503 views

Are all Virtual Private Networks in the 10.x.x.x range?

I am in the very early stages in planning a program for monitoring a VPN connection and am currently catching all ipv4 addresses from the adapters. When I am connected to my VPN it is always starting ...