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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Have one application use VPN while others do not in Linux?

I want one application to use a VPN connection while others do not. I'm using Xubuntu (thus XFCE) but I'd like a command line / static configuration solution if it's possible. Is it possible to ...
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Improving VPN performance - stronger encryption = more performance?

I have a site-to-site VPN set up with two SonicWall's (a TZ170 and a Pro1260). It was suggested to me that turning off encryption (so the VPN is tunneling only) would improve performance. (I'm not ...
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2answers
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MULTI: bad source address from client - any one-off solutions?

Setup: I have the an openvpn client/server setup (config files at bottom), and I get the infamous MULTI: bad source address from client [192.168.x.x], packet dropped message at server. The server has ...
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1answer
199 views

What is a “VPN Consolidator”

A client recently mentioned using a VPN consolidator for remote access to their server. I've never heard this term used before. Is it some type of slang that I'm not familiar with? I did a bit of ...
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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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Cisco VPN Client on Vista - Virtual Adapter

I have used the Cisco VPN client for years, and on XP it is pretty much rock solid, on Vista, not so much. You might be able to connect, but unless you set up a constant ping to something, it usually ...
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487 views

How do VPN servers/clients avoid routing their own remote connection packets through themself?

I am trying to conceptualise how networking works under the hood for linux VPNs which use TUN interfaces. My current best guess is as follows (please correct me): Connection established to remote ...
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OpenVPN bypass on some ports

I have a server running Debian 7 and I would like to connect to a VPN and let all the traffic pass via the VPN except for some ports (SSH, hosted websites, etc). I've searched for some time now in ...
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Tunneling a public IP to a remote machine

I have a Linux server A with a block of 5 public IP addresses, 8.8.8.122/29. Currently, 8.8.8.122 is assigned to eth0, and 8.8.8.123 is assigned to eth0:1. I have another Linux machine B in a remote ...
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Can I use OpenVPN with a single secret password instead of a keys set?

I am looking forward to create an as-simple-as-possible OpenVPN set-up. I would like to use a single password to secure the communication instead of a set of key files. How can I set it up this way?
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Can BIND alter a response based on requesting IP address?

Hello Serverfault, I work for a hospital who set up their network using 192.168.0.0/23 (before I arrived). We are wanting to have laptops and mobile clients connect from remote locations using VPN, ...
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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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How to Configure Secure Connectivity between Multiple Subnets

I have the following setup 2 x linode vps 1 x lab (physical) running 4 vps My goal is to make it so all nodes act as if they are on the same LAN. This will allow me to alter IPTable rules, to allow ...
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1answer
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SSH over VPN connection

We have an AWS EC2 server that we've configured to be only accessible (via SSH) from within our office network. Obviously this isn't ideal for remote arrangements where someone has to connect to the ...
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2answers
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strongSwan IKEv2 + Windows 7 Agile VPN: What is causing Error 13801

I have an AWS instance that I want to be a VPN server. It will connect Windows 7 clients to a private network in the Amazon cloud. I have installed Ubuntu 12.04 and the strongswan-ikev2 package. ...
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3answers
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How do I route a public IP range over an IPSEC VPN?

So, I have an established IPSec Site to Site tunnel. Site A has a SonicWall, Site B has a EdgeRouter. The first tunnel consists of Site A's NATed ips to Site B's NATed ips. Everything works as ...
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4answers
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What's going on with this strange MTU?

I have a server mike at our office communicating with a remote server through a VPN. There have been various problems which seem to be linked to the MTU size. Mike is a RHEL 3 server and the customer ...
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1answer
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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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1answer
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Direct connection between multiple clients on OpenVPN

I've spent my entire day learning about VPN, and have been working with following setup: 2 VPS Servers at the same data centre in Texas. (Texas1 and Texas2), 1 VPS in England and 1 VPS in Atlanta and ...
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2answers
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Windows Server 2008 R2 as VPN Server

I'm going to be setting up a network at a data center and I was wondering if it's possible to have Windows Server 2008 R2 act as a VPN server. Also, I've heard there are 3 main types of VPN: PPTP, ...
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3answers
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Making an ASA TFTP backup through VPN

I have a site to site VPN configured between two ASA 5520s. I have a TFTP server behind ASA1, with an IP of 172.16.1.1 on the "inside" network. I'd like to be able to copy the running config of ASA2 ...
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2answers
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How to correctly configure DNS usage in Ubuntu? Authoritative answers without RA flag are ignored

I have latest clean Ubuntu 14.04.1 64-bit from official website installed in Virtualbox. I connect to a VPN network using vpnc that sets 2 DNS servers using DHCP: user@virtual:~$ cat /etc/resolv.conf ...
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1answer
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Mac OS X VPN Encryption Defaults

I need to connect one Mac (OS X 10.8.2) from our internal network to a site-to-site VPN and was asked to provide some information about our network and encryption settings. What are the OS X defaults ...
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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 ...
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Cisco 877 as a VPN server?

I have a Cisco 877 router which connects my network to the Internet using an ADSL line, a single public IP address and NAT; the IOS version is 15. Everything is working ok, but I'd like to configure ...
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AWS StrongSwan IPSec VPN

I've been playing around with StrongSwan recently as a replacement to Amazons VPN which cost money. I'm having trouble completely configuring a IPSec tunnel between a remote server and a Ubuntu EC2 ...
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4answers
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Prevent SSH connection lost after logging into VPN on server machine

I encountered an issue that I can't deal with. When I'm logged onto an VPS over SSH and try to estabilish VPN connection on that VPS, the SSH connection between VPS and my machine get lost. I assume ...
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1answer
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Remove Server 2012 Remote Access Server

My IT director was walking me through setting up a Server 2012 VPN/RA server. We did not do this in our test environment, and now I would like to remove it. I know that when installing this server it ...
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Connecting to basic office network from the outside

Back Story: I work in the IT Department for a company that got its start by being given space to work out of from a warehouse when my company first got its start about a decade ago. Ever since then, ...
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4answers
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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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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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How should DNS be configured for remote VPN access to a Windows Domain?

Suppose you have a small windows domain configured as follows: domain name is ad.example.com (as per these guidelines) DC1 is at 10.10.10.3 DC2 is at 10.10.10.4 DC1 and DC2 are running the AD-...
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Samba over OpenVPN - horribly slow

I've set up a server to run OpenVPN, with the purpose of clients accessing Samba shares remotely. The server is running CentOS 5.6, a decent quad-core Xeon CPU and plenty of RAM. The client I've ...
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1answer
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IPv6 over Cisco IPSec VPN?

We use a Cisco ASA 5505 as the firewall and IPSec VPN endpoint on our network. We use split-tunneling to reduce the load on our internet link. In other words, when someone is connected to the VPN ...
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1answer
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Windows Server 2008 R2 RAS VPN: access server on internal interface ip

short question: I'm usually a linux admin but need to setup a Win2k8 R2 server for a student project. The server is running as VM on a root server and has a public internet IP assigned. Additionally I ...
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1answer
325 views

VPN server on Windows Server 2008 for a small office

I'm going to refurbish the IT-infrastructure for a small organization with one single office, and I'm not sure what VPN server to use. In your opinion, would the built-in Windows Server 2008 VPN ...
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2answers
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How do I setup virtual networking Xenserver?

I'd have a network like this currently. Basically, It's two Xenservers connected to our colocation provider's switch via one ethernet cable per server. Each server currently has a second ethernet card ...
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Can't access database server over VPN

I am attempting to connect to an Oracle server via a VPN. I have tried to do so, unsuccessfully, from OSX and, alternately, from a Windows XP VM machine (VMWare Fusion) running on OSX. I can, ...
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1answer
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pfSense - IKEv2 with EAP-RADIUS: Any fallback option if the RADIUS server is down?

I'm deploying an IKEv2 VPN authenticating against a RADIUS service within a pfSense 2.3-RELEASE box. But I'm afraid of the complications of this approach when the RADIUS server is down. Since the ...
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1answer
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What would cause inconsistent SSL failure over Cisco ASA VPN

Over the weekend I completed the installation and testing of a Cisco ASA 5512 to replace our old router/firewall. Today, I've been wrestling with an issue of browsers inconsistently failing to connect ...
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Where can I download the latest 64-bit edition of Sonicwall SSL-VPN NetExtender for Windows 7? [closed]

Does anyone know where to download the latest edition of the 64-bit version of SonicWall SSL-VPN NetExtender for Windows 7?
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1answer
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Windows Server 2003 IPSec Tunnel Connected, But Not Working (Possibly NAT/RRAS Related)

Configuration I have setup a "raw" IPSec tunnel between a Windows Server 2003 (SBS) machine and a Netgear FVG318 according to the instructions in Microsoft KB816514. The configuration is as follows (...
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8answers
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File transfer problems through VPN when Cisco IPS is enabled

We have a Cisco ASA 5510 firewall with the IPS module installed. We have a customer that we must connect to via VPN to their network to exchange files via FTP. We use the Cisco VPN client (version 5....
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Replacement for Linksys WRV54G? [closed]

I work at a small company that has two offices, each with its own Business DSL connection to the Internet. In order to create a LAN between the two offices, my predecessor purchased and installed two ...
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Small business firewall/VPN device [closed]

What's a good small business (<50 users at a location) firewall and VPN device? Wireless would be a nice addition, and I'm thinking of something in the $1,000 range. This would be for businesses ...
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3answers
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Best way to create a vpn between two windows machines?

I'm looking for way to create a VPN between two windows machines. I want the installed software to behave as if the two computers are connected through a LAN. What's the best (free) way to do it? ...
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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. 10.0.0.0/...
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How do I get SonicWALL Global VPN to work with Windows 8.1?

I have been running SonicWALL Global VPN v4.7.3.0403 on Windows 8 without trouble for more than a year. Today I upgraded to Windows 8.1 RTM and noticed that it disabled my Global VPN connection. I ...
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What is the recommended way to permanently connect two remote linux based environments together?

We have a linux based environment hosted remotely and a few spare machines in the office. I'd like to use those machines as workers for the remotely hosted application though they would need permanent ...
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How difficult is it to setup Mac OS X Server?

We are a small office of about 4 people, and we would like to have a 27-inch iMac (Core 2 Duo) setup as a server and workstation simultaneously, using Mac OS X Server. This might seem like overkill (...