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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What is “the meaning” of this `ip route`?

I'm slowly learning more about IP routing and the ip toolset by investigating a VPN. After I start a particular VPN client, one of the (new) routes displayed by ip route show is 128.0.0.0/1 via ...
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18 views

DNAT in Shorewall not working for VPN

I have a firewall (10.8.0.1) connected to an internal server (10.8.0.2) via VPN. On the firewall the VPN interface is called tun0. So in my shorewall configuration I have this: $ cat interfaces #ZONE ...
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35 views

ubuntu xl2tp ppp0 not properly handling the DF flag (Packet Corrupt) while sending packages > defined MTU

While trying to setup an Ubuntu Linux server as a client to an l2tp/IPSEC server, I notice inconsistencies while trying to send data. The tunnel/VPN establish the connection / handshake properly and ...
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37 views

Clarification on Tinc VPN Configuration

I've been looking at docs like the tinc manual and Arch's tinc wiki page and am still somewhat mystified as to how to configure my setup. The hosts (all Arch or Debian linux or rooted Android) to be ...
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82 views

OpenVPN server only gives username/password and client requires certificates

We have a eFive OpenVPN server which gives me a CA cert, usernames and passwords for the account. In addition, I have a RUT550 LTE router, from Teltonika, whose OpenVPN client setting allows static ...
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71 views

Deploying SSTP VPN on Windows 2012 - How to route packets to other servers?

I've finally managed to deploy an SSTP VPN between my Windows 2012 (non R2) server and Windows 7 client. It's amazing how much easier it work with a real certificate and avoiding the self-signed ...
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20 views

amazon aws ec2 setting ppp vpn server POSTROUTING eth3 failed

I use amazon aws ec2 to setting ppp pptpd vpn server. I have two interface is eth0 and eth3. And the iptables -t nat -A POSTROUTING -o eth0 -s 192.168.1.100 -j SNAT --to-source 10.0.0.233 is working ...
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64 views

Change source IP for packet incoming in VPN tunnel

The following configuration allows me to change the source IP from 192.168.0.0/24 to 172.16.0.100 when hosts going to 10.0.0.100 and it works. But I can't achieve this goal for the hosts incoming from ...
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17 views

VPN connected machines don't keep ports open

I have a Windows 2012r2 machine set up as a VPN server with 5 clients connecting (4 via PPTP and 1 via L2TP). I am using icinga2 to monitor these remote machines and am able to successfully do so ...
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116 views

Joining two networks over internet with same ip range

We have two offices in a single Windows 2003 domain and sharing same IP range (no overlapping). Every office has its Microtik router as gateway. Thing is, first office has a solid wired internet ...
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32 views

VPN tunnel from client A through relay B to server C

I need to send traffic from a client machine, A, to a VPN server, C, but through a relay host, B. All three of them have public IPv4 addresses, but for policy reasons, A must not send traffic ...
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60 views

Load Balancing VPN servers (Ubuntu)

I am trying to load balance two VPN servers, that are located quite far from one another. I am using Ubuntu with pptpd, is there anyway to load balance those two servers? So user connects pptp to ...
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37 views

Access ProxyChains thorugh local socks5 server

This question is a bit tricky but on it's basis I simply want a scenario where I can use my proxies just by connecting to 1 socks5 server from everywhere on my local network and don't have to worry ...
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1answer
92 views

VPN client acting as gateway for the rest of the LAN

To have a simple scenario, let's say we have: Office: Four computers running Debian and another computer running CentOS. HQs: A Debian running the VPN server which is located at the central HQs. ...
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51 views

Routing VPN traffic between two networks

I have recently set up a two-network bridge using OpenVPN (Connect two networks with OpenVPN) The following things work: -Pinging any Network 2 computers from Network 1 Gateway (10.0.1.9) -Pinging ...
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94 views

recover IPSec VPN preshared key

So I have set up L2TP VPN connection which uses preshared key. I remember both login and password but not preshared key. Is there any way in Windows XP/7 to recover it?
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36 views

VPN-tunnel renegotiation problems

I have an application running on top of Celery with redis as a broker. Redis is hosted at our datacenter but the workers are hosted on a separate line. We have setup two-way communcation between the ...
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80 views

Routing for NAT and site-to-site VPN with RRAS

I'm trying to set up a split-tunnel site-to-site VPN using an RRAS server that is currently doing NAT. Right now, the NAT works: all clients are assigned an IP address in the 192.168.2.0/24 range, and ...
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62 views

Nameserver delegation to private subnet

I'm currently having some problems delegating a subdomain, e.g. lan.example.com, to a nameserver in a private network. My private network is split in to subnets 192.168.0.1/24 <--- 192.168.0.1 ...
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184 views

Connect two networks with OpenVPN

I am trying to connect two networks together via OpenVPN. Gateways can ping each other, however they cannot access other computers on the network they're joining. Logs don't show any errors, and the ...
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2answers
110 views

In an OpenVPN network, Windows clients cannot access the host and other clients

I have set up an OpenVPN network and I'd like to let every client in the network be able to connect to each other, ie. servers 10.8.0.1, 10.8.0.2 and 1.8.0.3 should be able to communicate over VPN and ...
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3answers
298 views

LAN access with Cisco AnyConnect Secure Mobility Client v. 3.0.4235

Whenever I connect to a VPN server using the Cisco AnyConnect Secure Mobility Client v. 3.0.4235 (probably also with other versions) I lose access to my LAN. I hope to remedy this by manually adding ...
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206 views

AWS Override VPC DHCP - Additional Option Sets for RRAS VPN Clients

I am trying to run a RRAS VPN server that pulls from a windows DHCP server running on the same box. I am finding that the AWS DHCP is getting hit first with the DHCP request and it provides invalid ...
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30 views

VPN tunnel not coming up in sonicwall firewall 3500 NSA

I have a customer who has two internet connection at two location of his office via my ISP and another ISP. THe problem is when this customer uses other ISP conenction at both ends of and makes a VPN ...
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58 views

ocserv: How to identify a connecting user?

My ocserv auth mod is certificate. I knew from the sample config file that ocserv could provide a connect-script which has REASON, USERNAME, GROUPNAME, HOSTNAME, DEVICE, IP_REAL, IP_LOCAL, IP_REMOTE ...
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56 views

VPN server with mitmproxy

I have a mitmproxy script I want to run on all incoming VPN HTTP/HTTPS traffic, however, I am not sure how to achieve this. Is there a linux VPN daemon that allows me to redirect traffic to a ...
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31 views

DirectAccess Multiple Subnet Deployment

I am looking at doing a DirectAccess rollout on AWS using a single Server 2012 R2 instance behind an edge device. My clients are mostly running Windows 7 Pro/Ultimate, but there will be some other ...
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1answer
26 views

Is there an option to connect to the VPN before logging in using the SonicWall VPN Client?

I read that there is an option in Windows XP and with the Cisco VPN client to logon to the VPN before logging into the machine; is it possible to connect to the VPN using the SonicWall VPN client ...
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1answer
288 views

Cannot RDP into Windows 7 over VPN

The exact scenario where it fails: I am unable to RDP into any Windows 7 or 2008 R2 servers within a certain subnet, while connected to the network via VPN. Windows 7 Client connected through the ...
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1answer
112 views

RRAS Site-to-Site VPN Issues When Behind Edge Devices

I have two networks I would like to bridge using PPTP using Windows Server 2008 R2 on both ends. Network A is 10.150/16 subnet without DHCP available Network B is 192.168.150/24 subnet with DHCP ...
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56 views

Windows VPN Server on Amazon EC2 Instance

we are small software company. Our web/db servers were in different networks. Recently we decided to create small network on Amazon EC2 and move all those servers to EC2. I have created several ...
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69 views

PDNS forward zone subdomains only

I am trying to use zone forwarding, but only for subdomains. Imagine that you have an VPN server at the domain vpn.provider.tld. This domain is pointing to an global IP address, accessible from the ...
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82 views

Members of my PPTP VPN can't see each others

In relation to the answer of this post: pptp on Ubuntu server can't ping other machines on the LAN Is it possible to have the members connected to the VPN see each others if they don't use the ...
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63 views

AD Roaming Profiles via VPN not synchronizing

I want to create local Client-VMs (Windows 8.1) for our developers. These should connect to our VPN and login on our AD server (Windows Server 2012 R2). I'm using serverside profiles for this so that ...
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47 views

why cisco VPNC work on the second time each time and not on the first time

I use the vpnc ( cisco VPN that installed on linux red-hat 6.X ) and the vpnc.conf file look like this more /etc/vpnc.conf ## generated by pcf2vpnc IPSec ID Comvwde IPSec gateway 217.118.6.7 ...
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1answer
51 views

When tunnelling through a VPN, block or redirect certain domains [closed]

I'd like to block or redirect certain domains for anyone using my VPN tunnel (pptp). I thought simply editing the hosts file would achieve this, but I guess not. Is there another way? The VPN is set ...
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101 views

Windows 2012 r2 port forwarding

So my problem is that I'm trying to open a Virtualbox RDP on Windows 2012 to VPN nework on the same host. I've got one external network adapter and a virtual adapter, created by VPN. I've set up a ...
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52 views

Cisco vpn access to another router

I am using a Cisco ASA 5505 to VPN into my network (which is working great), and I want to connect to a different network that is on a Asus RT-N66v. For example: network 10.1.1.1 is my VPN and ...
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1answer
44 views

connection to ssh server [closed]

How to connect to ssh server on port 22 from behind very restrictive firewall where is only port 80 and 443 available? I tried port mapping on my ssh client but it says it can map local port higher ...
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2answers
82 views

VPN Client can access local subnet but not gateway

We have a 2012 VPN server which is allowing the VPN clients to access servers on the same subnet, but does not allow routing to the default gateway. The server is configured in RRAS as an IPv4 ...
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40 views

IOS8 IKEV2 user not disconnecting from windows server 2008 RRAS

We have severs where all rras protocols are setup, and all are working fine, recently ios8 starts supporting ikev2. we are using configuration file on ios8 for this purpose, connection established ...
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31 views

SSTP VPN stops working unless certificate is reinstalled

Any ideas why this may be? It sas happened on 2 separate Windows Servers. A 10 year certificate was installed, and yet both VPNs stopped connecting after a few weeks/months. A simple reinstall of the ...
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2answers
141 views

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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31 views

vpnc router on CentOS not forwarding the rensponse

I'm mounting a vpnc router on an openstack environment. I mounted a CentOS Server with ip_forward enabled and iptables, with local IP 192.168.2.2. The remote network is 10.0.0.0/8 and the local ...
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105 views

Can we connect an OSX computer to an AWS VPC VPN?

We have a OSX computer we would like to connect to our AWS VPC. This OSX computer is on a network we do not control in a different physical location as the rest of our network. Using OSXs Networking ...
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62 views

Connecting to Windows fileserver from outside local network

I'm quite new to Windows Server and all its finesse. I have already set up a webserver, fileserver and VPN. What I would like to know is it possible to use the folder I have set up on the fileserver ...
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48 views

How discovery if data center provider is keeping network transfer logs or listening for traffic of the VPN provider? [closed]

How do I know if the data center provider is keeping network transfer logs or listening for traffic on both inbound and outbound connections of my VPN service hosted in their infrastructure? I mean ...
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1answer
92 views

connect to ipsec vpn on sonicwall device from a powershell script: Guidance?

Win2012-R2 We have a vpn network device that can surface ipsec and pptp vpn endpoints. I can see docs for various vpn commands in powershell, e.g. ...
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102 views

Organizational Access To Google Apps From China

I was tasked in deploying Google Apps for business and I have multiple offices in China which has to be on it. Anyone knows how can I bypass china's deep packet inspection? Given my company's ...
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1answer
135 views

Intermittent limited access to network share over VPN

I'm looking for ideas for what to check. I've got a user that has issues when she connects to our network over VPN, but never has issues when she's connected in the office. The issue is with one of ...