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• Remote Desktop Connection over VPN on mac

  - by Diego Faria

  I'm trying to connect to a Windows computer on over a VPN connection using Remote Desktop connection. I opened Network on mac and created a new connection. Interface: VPN. VPN Type: PPTP. I filled the inputs for server address, account name, password and applied. I connect the VPN and it connects. I open Remote Desktop Connection and put the IP of the machina i want to connect but it dont connect, a problem occurs saying that the machina may be turned off and etc. But in a windows machine I can connect there and the machine is up and running. On my mac I ping to the ip address that a want to connect and it has no response. I think that the vpn have a problem, is there a way for me to certificate that i am on the vpn network ? Whats going on?

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• Windows VPN - NO internet access

  - by sharru

  I host a network of servers behind a Fortigate 200a firewall in the DC. I connect to those servers via a VPN connection. The problem is that when i connect to the VPN, I lose my internet connection on the local PC (windows 7). I would like to be connected to the VPN and still surf the web. i guess this means to only forward a range of ip to the VPN connection. I've read other answers on serverfault, talking about "un-check the 'Use default gateway on remote network' option in your Windows 7 PPTP network connection settings". When i do that , i get internet access but no access to the servers in the VPN. Any idea how to get both working? Should i change something on the fortigate 200a config? Do i need two networks cards? Is there a place in windows to define ip range for the vpn connection?

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• a couple of questions about proxy server,vpn & how they works

  - by Q8Y

  I have a couple of questions that are related to security. Correct me if i'm wrong :) If I want to request something (ex: visiting www.google.com): my computer will request that then it will to the ISP then to my ISP proxy server that will take the request and act as a middle man in this situation ask for the site (www.google.com) and retrieve it then the proxy will send it back to me. I know that its being done like that. So, my question is that, in this situation my ISP knows everything and what I did request, and the proxy server is set by default (when I ask for an internet subscription). So, if I use here another proxy (lets assume that is a highly anonymous and my ISP can't detect my IP address from it), would I visit my ISP and then from my ISP it will redirect me to the new proxy server that I provide? Will it know that there is someone using another proxy? Or will it go to another network rather than my ISP? Because I didn't get the view clearly. This question is related to the first one. When I use a VPN, I know that VPN provides for me a tunneling, encryption and much more features that a proxy can't. So my data is travelling securely and my ISP can't know what I'm doing. But my questions are: From where is the tunneling started? Does it start after I visit the ISP network (since they are the one that are responsible for forwarding my data and requests)? If so, then not all my connection is tunneled in this way, there is a part that is not being tunneled. Since, every time I need to do anything I have to go to my ISP and ask to do that. Correct me if I misunderstand this. I know that VPN can let my computer be virtually in another place and access its resources (ex: be like in my office while I'm in my home. This is done via VPN). If I use a VPN service provider so that I can access the internet securely and without being monitored by my ISP. In this case, where is my encrypted data saved? Is it saved in my ISP or in the VPN service provider? If I use a VPN, does anyone on the internet know what I'm doing or who I am? Even the VPN service provider? Can they know me? I think they should know the person that is asking for this VPN service, am I right?

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• Configure browser and VPN traffic

  - by Zachzor

  Hello everyone. I've been having a few issues with my company's VPN server. The VPN is running on a Mac Server (10.6.x) and I'm also using a Macbook (10.6.5). I've been building specific programs to gather information from IPs, and to work on this while I'm at home I need to go through our VPN to access the network. Unless I send all traffic over VPN, I'm not able to hit those specific IPs. However, I'm unable to access the internet through my web browser when I send all my traffic over VPN. I was wondering if there was a way (besides setting up a split tunnel) that I could set up a web browser to go through my current wireless connection, as opposed to going through the VPN like the rest of my applications. Wether the browser be Chrome, Firefox, or Safari doesn't matter to me. Anyone else run into this issue and find a clever way to solve it? Thank you!

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• Access Windows VPN DNS from Ubuntu

  - by user46427

  I am using Ubuntu 10.04 to access a Windows VPN. I connect to the VPN from Ubuntu, and when I open a Windows 7 virtual machine (VirtualBox), everything works great ... I can access local network drives, ping local servers, remote into local machines, etc. However, I can do none of this from Ubuntu. With the VPN connected, I cannot even ping anything within the VPN local network. I'm guessing it's a DNS issue that Windows is handling automatically but Ubuntu needs a setting somewhere to tell it to use the DNS servers of the VPN network? Any ideas? I'm a relative novice to Ubuntu, esp. VPN in Ubuntu. [EDIT] Actually, I'm almost positive it is DNS, because if I get the IP address from the Windows VM I can use Terminal Server Client to remote into a machine.

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• Can't resolve Mac's machine name on VPN

  - by Raghuveer

  My mac'c machine name is something like this: hostname.company.com but whenever I connect to VPN, it becomes something like vpn-xxxx.company.com where xxxx are some random numbers. Because of this, some of my scripts which are dependent on host name gets blocked. We use the standard mac's vpn setup which comes with OS X Lion (under network preferences). How can I resolve to the correct mac's name even if I am on vpn ? That is even if I am connected to VPN, my machine name should resolve to hostname.company.com and NOT to vpn-xxxx.company.com. Any suggestions would be really appreciated.

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• Server 2012r2 VPN DNS

  - by Tyron Gower

  Have an issue where onsite clients cannot resolve VPNusers. but VPN users can resolve onsite machines. example. USER! uses LAPTOP1 USER1 connects to VPN gets internal IP address of 10.243.0.200 USER1 pings SERVER1 - resolve to ip and gets reply USER1 RDP into SERVER1 (inside VPN) USER1 pings LAPTOP1 from SERVER1 resolves to ip address last assigned by DHCP (10.243.0.139) ping fails USER1 pings 10.243.0.200 from SERVER1 gets reply. Running Server 2012r2 It is a domain controller, DNS and VPN server. VPN is just configured with basic default settings. All VPN users have static IP setup in AD. Not sure where to go from here.

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• How to connect to VPN using commands in Linux (Fedora 16)

  - by WarFox

  Usually, I use the network connections icon on the top bar to connect to VPN. The connection is configured properly and it connects well. Configuration screen shot is given below. As you can see I have selected the 'Connect automatically' option. But this option doesn't help in connecting to VPN automatically upon login. This is my university VPN and it uses 'Point-to-Point encryption (MPPE)' for authentication I need to connect to the VPN using command line, so that I can write a script and run it at start up, so the connection is automatically established every time I login. This will also help in connecting to VPN when I login from 'init 3' mode. I depend on this VPN connection for my internet access. Please help me with the required commands.

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• How to make a backup VPN server?

  - by akalenuk

  I have a small VPN network with a bunch of clients working mostly with each other and a VPN server. Everything works fine, except, obviously I can't shut VPN server down without breaking the network. I have a spare machine, which worked as an VPN server for the same network before so it is signed with the same SA as the first one and basically configured just the same as the first one. Technically I can make my clients work with it with little adjustment (by setting remote in etc/openpvn/clientx.conf), but it would be great make this switch automated. So basically I want two VPN servers running in the same network to work completely interchangeable without clients even knowing this. Can I do this with VPN or should I dig deeper into physical network layer?

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• network is not available even when cisco vpn client is connected. wrong route?

  - by javapowered

  I'm using Vodafone 3G modem. I've disabled other network devices in the system (ethernet, wifi, wimax) turned off firewall and antivirus. cisco vpn client connects successfully but I still can not access computer 192.168.147.120 (as well as any other computer from network). Any suggestions are welcome as I don't know what to do. ipconfig /all and route print commands (translated to english): Microsoft Windows [Version 6.1.7601] (C) Microsoft Corporation (Microsoft Corp.), 2009. All rights reserved. C: \ Users \ Oleg> ipconfig / all IP Configuration for Windows The name of the computer. . . . . . . . . : OlegPC The primary DNS-suffix. . . . . . : Node Type. . . . . . . . . . . . . : Hybrid IP-routing is enabled. . . . : No WINS-proxy enabled. . . . . . . : No Ethernet adapter Local Area Connection 4: DNS-suffix for this connection. . . . . : Description. . . . . . . . . . . . . : Cisco Systems VPN Adapter Physical Address. . . . . . . . . 00-05-9A-3C-78-00 DHCP is enabled. . . . . . . . . . . : No Autoconfiguration Enabled. . . . . . : Yes Local IPv6-address channel. . . : Fe80:: c073: 41b2: 852f: eb87% 26 (Preferred) IPv4-address. . . . . . . . . . . . : 10.53.127.204 (Preferred) The subnet mask. . . . . . . . . . : 255.0.0.0 Default Gateway. . . . . . . . . : IAID DHCPv6. . . . . . . . . . . : 536872346 DUID the client DHCPv6. . . . . . . 00-01-00-01-14-6F-4C-8D-60-EB-69-85-10-2D DNS-servers. . . . . . . . . . . : Fec0: 0:0: ffff:: 1% 1 fec0: 0:0: ffff:: 2% 1 fec0: 0:0: ffff:: 3% 1 NetBios over TCP / IP. . . . . . . . : Disabled Adapter mobile broadband connection through a broadband adapter mobile communications: DNS-suffix for this connection. . . . . : Description. . . . . . . . . . . . . : Vodafone Mobile Broadband Network Adapter (Huawei) Physical Address. . . . . . . . . 58-2C-80-13-92-63 DHCP is enabled. . . . . . . . . . . : No Autoconfiguration Enabled. . . . . . : Yes IPv4-address. . . . . . . . . . . . : 10.229.227.77 (Preferred) The subnet mask. . . . . . . . . . : 255.255.255.252 Default Gateway. . . . . . . . . : 10.229.227.78 DNS-servers. . . . . . . . . . . : 163.121.128.134 212.103.160.18 NetBios over TCP / IP. . . . . . . . : Disabled Tunnel adapter isatap. {737FF02E-D473-4F91-840E-2A4DD293FC12}: State of the environment. . . . . . . . : DNS Suffix. DNS-suffix for this connection. . . . . : Description. . . . . . . . . . . . . : Adapter Microsoft ISATAP # 3 Physical Address. . . . . . . . . 00-00-00-00-00-00-00-E0 DHCP is enabled. . . . . . . . . . . : No Autoconfiguration Enabled. . . . . . : Yes Tunnel adapter isatap. {EF585226-5B07-4446-A5A4-CB1B8E4B13AC}: State of the environment. . . . . . . . : DNS Suffix. DNS-suffix for this connection. . . . . : Description. . . . . . . . . . . . . : Adapter Microsoft ISATAP # 4 Physical Address. . . . . . . . . 00-00-00-00-00-00-00-E0 DHCP is enabled. . . . . . . . . . . : No Autoconfiguration Enabled. . . . . . : Yes Tunnel adapter Teredo Tunneling Pseudo-Interface: DNS-suffix for this connection. . . . . : Description. . . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface Physical Address. . . . . . . . . 00-00-00-00-00-00-00-E0 DHCP is enabled. . . . . . . . . . . : No Autoconfiguration Enabled. . . . . . : Yes IPv6-address. . . . . . . . . . . . : 2001:0:4137:9 e76: ea: b77: f51a: 1cb2 (Basically d) Local IPv6-address channel. . . : Fe80:: ea: b77: f51a: 1cb2% 16 (Preferred) Default Gateway. . . . . . . . . ::: NetBios over TCP / IP. . . . . . . . : Disabled C: \ Users \ Oleg> route print ================================================== ========================= List of interfaces 26 ... 00 05 9a 3c 78 00 ...... Cisco Systems VPN Adapter 23 ... 58 2c 80 13 92 63 ...... Vodafone Mobile Broadband Network Adapter (Huawei) 1 ........................... Software Loopback Interface 1 19 ... 00 00 00 00 00 00 00 e0 Adapter Microsoft ISATAP # 3 20 ... 00 00 00 00 00 00 00 e0 Adapter Microsoft ISATAP # 4 16 ... 00 00 00 00 00 00 00 e0 Teredo Tunneling Pseudo-Interface ================================================== ========================= IPv4 Route Table ================================================== ========================= Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 10.229.227.78 10.229.227.77 296 10.0.0.0 255.0.0.0 On-link 10.53.127.204 286 10.6.93.21 255,255,255,255 10.0.0.1 10.53.127.204 100 10.13.50.12 255,255,255,255 10.0.0.1 10.53.127.204 100 10.53.8.0 255.255.252.0 10.0.0.1 10.53.127.204 100 10.53.127.204 255.255.255.255 On-link 10.53.127.204 286 10.53.128.0 255.255.248.0 10.0.0.1 10.53.127.204 100 10.53.148.0 255,255,255,240 10.0.0.1 10.53.127.204 100 10.53.148.16 255,255,255,240 10.0.0.1 10.53.127.204 100 10.229.227.76 255.255.255.252 On-link 10.229.227.77 296 10.229.227.77 255.255.255.255 On-link 10.229.227.77 296 10.229.227.79 255.255.255.255 On-link 10.229.227.77 296 10.255.255.255 255.255.255.255 On-link 10.53.127.204 286 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 192.168.147.0 255,255,255,240 10.0.0.1 10.53.127.204 100 192.168.147.96 255,255,255,240 10.0.0.1 10.53.127.204 100 192,168,147,112 255,255,255,240 10.0.0.1 10.53.127.204 100 192,168,147,128 255,255,255,240 10.0.0.1 10.53.127.204 100 192,168,147,144 255,255,255,240 10.0.0.1 10.53.127.204 100 192,168,147,224 255,255,255,240 10.0.0.1 10.53.127.204 100 192.168.214.0 255.255.255.0 10.0.0.1 10.53.127.204 100 192.168.215.0 255.255.255.0 10.0.0.1 10.53.127.204 100 194.247.133.19 255,255,255,255 10.0.0.1 10.53.127.204 100 213,247,231,194 255,255,255,255 10.229.227.78 10.229.227.77 100 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 10.229.227.77 296 224.0.0.0 240.0.0.0 On-link 10.53.127.204 286 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 10.229.227.77 296 255.255.255.255 255.255.255.255 On-link 10.53.127.204 286 ================================================== ========================= Persistent Routes: None IPv6 Route Table ================================================== ========================= Active Routes: If Metric Network Destination Gateway 16 58:: / 0 On-link 1306:: 1 / 128 On-link 16 58 2001:: / 32 On-link 16 306 2001: 0:4137:9 e76: ea: b77: f51a: 1cb2/128 On-link 16 306 fe80:: / 64 On-link 26 286 fe80:: / 64 On-link 16 306 fe80:: ea: b77: f51a: 1cb2/128 On-link 26 286 fe80:: c073: 41b2: 852f: eb87/128 On-link 1306 ff00:: / 8 On-link 16 306 ff00:: / 8 On-link 26 286 ff00:: / 8 On-link ================================================== ========================= Persistent Routes: None C: \ Users \ Oleg>

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• How do you use an iPhone and VPN over Mobile Data Network (AT&T)? [closed]

  - by RSolberg

  I know that that iPhone has the CISCO VPN software installed on it, but how can you use this software and connect to a network while on the mobile data network (AT&T)? I'm pretty sure that I was unable to get this work at one point in time, but if connected to wi-fi had no issues.

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• How to get a Cisco VPN 3000 config as text?

  - by Steven

  We would like to get a Cisco VPN device 3000 series configuration as a text file to look at the actual configuration, but apparently the interface is not a CLI but a graphical interface or menu driven. Is there a way to get access to the complete config as a text? And to copy and paste it to a text file?

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• How to configure VPN in Windows XP

  - by SAMIR BHOGAYTA

  VPN Overview A VPN is a private network created over a public one. It’s done with encryption, this way, your data is encapsulated and secure in transit – this creates the ‘virtual’ tunnel. A VPN is a method of connecting to a private network by a public network like the Internet. An internet connection in a company is common. An Internet connection in a Home is common too. With both of these, you could create an encrypted tunnel between them and pass traffic, safely - securely. If you want to create a VPN connection you will have to use encryption to make sure that others cannot intercept the data in transit while traversing the Internet. Windows XP provides a certain level of security by using Point-to-Point Tunneling Protocol (PPTP) or Layer Two Tunneling Protocol (L2TP). They are both considered tunneling protocols – simply because they create that virtual tunnel just discussed, by applying encryption. Configure a VPN with XP If you want to configure a VPN connection from a Windows XP client computer you only need what comes with the Operating System itself, it's all built right in. To set up a connection to a VPN, do the following: 1. On the computer that is running Windows XP, confirm that the connection to the Internet is correctly configured. • You can try to browse the internet • Ping a known host on the Internet, like yahoo.com, something that isn’t blocking ICMP 2. Click Start, and then click Control Panel. 3. In Control Panel, double click Network Connections 4. Click Create a new connection in the Network Tasks task pad 5. In the Network Connection Wizard, click Next. 6. Click Connect to the network at my workplace, and then click Next. 7. Click Virtual Private Network connection, and then click Next. 8. If you are prompted, you need to select whether you will use a dialup connection or if you have a dedicated connection to the Internet either via Cable, DSL, T1, Satellite, etc. Click Next. 9. Type a host name, IP or any other description you would like to appear in the Network Connections area. You can change this later if you want. Click Next. 10. Type the host name or the Internet Protocol (IP) address of the computer that you want to connect to, and then click Next. 11. You may be asked if you want to use a Smart Card or not. 12. You are just about done, the rest of the screens just verify your connection, click Next. 13. Click to select the Add a shortcut to this connection to my desktop check box if you want one, if not, then leave it unchecked and click finish. 14. You are now done making your connection, but by default, it may try to connect. You can either try the connection now if you know its valid, if not, then just close it down for now. 15. In the Network Connections window, right-click the new connection and select properties. Let’s take a look at how you can customize this connection before it’s used. 16. The first tab you will see if the General Tab. This only covers the name of the connection, which you can also rename from the Network Connection dialog box by right clicking the connection and selecting to rename it. You can also configure a First connect, which means that Windows can connect the public network (like the Internet) before starting to attempt the ‘VPN’ connection. This is a perfect example as to when you would have configured the dialup connection; this would have been the first thing that you would have to do. It's simple, you have to be connected to the Internet first before you can encrypt and send data over it. This setting makes sure that this is a reality for you. 17. The next tab is the Options Tab. It is The Options tab has a lot you can configure in it. For one, you have the option to connect to a Windows Domain, if you select this check box (unchecked by default), then your VPN client will request Windows logon domain information while starting to work up the VPN connection. Also, you have options here for redialing. Redial attempts are configured here if you are using a dial up connection to get to the Internet. It is very handy to redial if the line is dropped as dropped lines are very common. 18. The next tab is the Security Tab. This is where you would configure basic security for the VPN client. This is where you would set any advanced IPSec configurations other security protocols as well as requiring encryption and credentials. 19. The next tab is the Networking Tab. This is where you can select what networking items are used by this VPN connection. 20. The Last tab is the Advanced Tab. This is where you can configure options for configuring a firewall, and/or sharing. Connecting to Corporate Now that you have your XP VPN client all set up and ready, the next step is to attempt a connection to the Remote Access or VPN server set up at the corporate office. To use the connection follow these simple steps. To open the client again, go back to the Network Connections dialog box. 1. One you are in the Network Connection dialog box, double-click, or right click and select ‘Connect’ from the menu – this will initiate the connection to the corporate office. 2. Type your user name and password, and then click Connect. Properties bring you back to what we just discussed in this article, all the global settings for the VPN client you are using. 3. To disconnect from a VPN connection, right-click the icon for the connection, and then click “Disconnect” Summary In this article we covered the basics of building a VPN connection using Windows XP. This is very handy when you have a VPN device but don’t have the ‘client’ that may come with it. If the VPN Server doesn’t use highly proprietary protocols, then you can use the XP client to connect with. In a future article I will get into the nuts and bolts of both IPSec and more detail on how to configure the advanced options in the Security tab of this client. 678: The remote computer did not respond. 930: The authentication server did not respond to authentication requests in a timely fashion. 800: Unable to establish the VPN connection. 623: The system could not find the phone book entry for this connection. 720: A connection to the remote computer could not be established. More on : http://www.windowsecurity.com/articles/Configure-VPN-Connection-Windows-XP.html

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• Cisco AnyConnect VPN Client broke my internet

  - by user137864

  I was using the AnyConnect client when it froze and I had to do a hard reboot of my computer. Now I can't connect to the internet at all, with or without VPN. The Network Connections manager seems to think I have a wired and wireless connection without a problem, but I can't go online. I have tried using /etc/init.d/networking restart and it even says it is "ok" with no luck. I am guessing I need to clear some settings somewhere and restart a service, but I am not sure what. Thanks!

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• Ubuntu 12.10 Network Connection menu GUI doesnt work properly

  - by wax

  Many a times I have seen When I click on network connection(besides volume icon), I am unable to select any options. When I hover over VPN connections, the list shows nothing. I have added many VPNs. Network menu becomes non responsive to any clicks. This is annoying because I am not able to connect to any of the VPN connections. "Enable Wireless", "Edit Connections" or any other option doesnt work at all. Restarting ubuntu fixes this issue. But problem starts randomly again and restarting my laptop is the only way to fix it. Is this a known bug? Any ways to fix this prob?

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• Connect to a VPN from a Virtual Machine

  - by kaharas

  I am running an Ubuntu ditro inside a VMWare virtual machine with a bridged connection on a windows 7 host. What I am trying to do is to have the virtual machine connect to a VPN, but I'm not having much success. At first, the system was using wicd, but I replaced it with network-manager who's supposed to have OpenVPN support. The problem is, even tho i've purged the wicd installation, there're connections shown in the network manager, and still, I'm able to access the net. I've also added the openvpn data in the network manager tab, but it's shown as never used. PS: when I try to stop and start the NetworkManager service, an error message pops up telling me that there's not such a service, but apt-get tells me i've already installed it...

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• Ubuntu VPN server setup

  - by framberries

  I followed the instructions that the answer on this thread gave, Easiest way to setup Ubuntu as a VPN server. However, I cannot get it to work. When I try to connect to my network, it just says the server cannot be reached. I setup the remote IP options (which I uncommented) to be 10.0.2.2-100. My router serves out 10.0.1.2-250. I also have users setup, but they are uncommented as well. I assume you need to uncomment them?

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• Mac OS X 10.8 VPN Server: Bypass VPN for LAN traffic (routing LAN traffic to secondary connection)

  - by Dan Robson

  I have somewhat of an odd setup for a VPN server with OS X Mountain Lion. It's essentially being used as a bridge to bypass my company's firewall to our extranet connection - certain things our team needs to do require unfettered access to the outside, and changing IT policies to allow traffic through the main firewall is just not an option. The extranet connection is provided through a Wireless-N router (let's call it Wi-Fi X). My Mac Mini server is configured with the connection to this router as the primary connection, thus unfettered access to the internet via the router. Connections to this device on the immediate subnet are possible through the LAN port, but outside the subnet things are less reliable. I was able to configure the VPN server to provide IP addresses to clients in the 192.168.11.150-192.168.11.200 range using both PPTP and L2TP, and I'm able to connect to the extranet through the VPN using the standard Mac OS X VPN client in System Preferences, however unsurprisingly, a local address (let's call it internal.company.com) returns nothing. I tried to bypass the limitation of the VPN Server by setting up Routes in the VPN settings. Our company uses 13.x.x.x for all internal traffic, instead of 10.x.x.x, so the routing table looked something like this: IP Address ---------- Subnet Mask ---------- Configuration 0.0.0.0 248.0.0.0 Private 8.0.0.0 252.0.0.0 Private 12.0.0.0 255.0.0.0 Private 13.0.0.0 255.0.0.0 Public 14.0.0.0 254.0.0.0 Private 16.0.0.0 240.0.0.0 Private 32.0.0.0 224.0.0.0 Private 64.0.0.0 192.0.0.0 Private 128.0.0.0 128.0.0.0 Private I was under the impression that if nothing was entered here, all traffic was routed through the VPN. With something entered, only traffic specifically marked to go through the VPN would go through the VPN, and all other traffic would be up to the client to access using its own default connection. This is why I had to specifically mark every subnet except 13.x.x.x as Private. My suspicion is that since I can't reach the VPN server from outside the local subnet, it's not making a connection to the main DNS server and thus can't be reached on the larger network. I'm thinking that entering hostnames like internal.company.com aren't kicked back to the client to resolve, because the server has no idea that the IP address falls in the public range, since I suspect (probably should ping test it but don't have access to it right now) that it can't reach the DNS server to find out anything about that hostname. It seems to me that all my options for resolving this all boil down to the same type of solution: Figure out how to reach the DNS with the secondary connection on the server. I'm thinking that if I'm able to do [something] to get my server to recognize that it should also check my local gateway (let's say Server IP == 13.100.100.50 and Gateway IP == 13.100.100.1). From there Gateway IP can tell me to go find DNS Server at 13.1.1.1 and give me information about my internal network. I'm very confused about this path -- really not sure if I'm even making sense. I thought about trying to do this client side, but that doesn't make sense either, since that would add time to each and every client side setup. Plus, it just seems more logical to solve it on the server - I could either get rid of my routing table altogether or keep it - I think the only difference would be that internal traffic would also go through the server - probably an unnecessary burden on it. Any help out there? Or am I in over my head? Forward proxy or transparent proxy is also an option for me, although I have no idea how to set either of those up. (I know, Google is my friend.)

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• PPTP connection fails with errors 800/806

  - by Mark S. Rasmussen

  I've got a client (Server 2008 R2) that won't connect to our production environment PPTP VPN server (Server 2003, running RRAS). The server is behind a firewall that has TCP1723 open as well as GRE. Other clients at our office are able to connect just fine. Our office is behind a Juniper SSG5-Serial firewall, but all outgoing traffic is allowed, and multiple other clients are able to connect to VPN servers without issues. I've also setup a completely different VPN server on another network outside of our office. The functioning clients connect just fine - the Server 2008 R2 machine doesn't. Thus it's definitely a problem with this machine in particular. I've rebooted it. I've disabled the firewall, no dice on either. I've run PPTPSRV and PPTPCLNT on the server/client and they're able to communicate perfectly - indicating there's no problem using neither TCP1723 nor GRE. The Server 2008 R2 machine is also running as a VPN server itself (incoming connection) and that's working perfectly. We have the issues no matter if there are active incoming connections or not. I'm not sure what my next debugging step would be; any suggestions? EDIT: The event log on the server has the following warning from RasMan: A connection between the VPN server and the VPN client xxx.xxx.xxx.xxx has been established, but the VPN connection cannot be completed. The most common cause for this is that a firewall or router between the VPN server and the VPN client is not configured to allow Generic Routing Encapsulation (GRE) packets (protocol 47). Verify that the firewalls and routers between your VPN server and the Internet allow GRE packets. Make sure the firewalls and routers on the user's network are also configured to allow GRE packets. If the problem persists, have the user contact the Internet service provider (ISP) to determine whether the ISP might be blocking GRE packets. Obviously this points to GRE being a potential problem. But seeing as I have other clients connectiong without problems, as well as PPTPSRV and PPTPCLNT being able to communicate, I'm suspecting this might be a red herring. EDIT: Here are the anonymized events logged by the client in chronological order: CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The user XXX\YYY has started dialing a VPN connection using a per-user connection profile named ZZZ. The connection settings are: Dial-in User = XXX\YYY VpnStrategy = PPTP DataEncryption = Require PrerequisiteEntry = AutoLogon = No UseRasCredentials = Yes Authentication Type = CHAP/MS-CHAPv2 Ipv4DefaultGateway = No Ipv4AddressAssignment = By Server Ipv4DNSServerAssignment = By Server Ipv6DefaultGateway = Yes Ipv6AddressAssignment = By Server Ipv6DNSServerAssignment = By Server IpDnsFlags = Register primary domain suffix IpNBTEnabled = Yes UseFlags = Private Connection ConnectOnWinlogon = No. CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The user XXX\YYY is trying to establish a link to the Remote Access Server for the connection named ZZZ using the following device: Server address/Phone Number = XXX.YYY.ZZZ.KKK Device = WAN Miniport (PPTP) Port = VPN3-4 MediaType = VPN. CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The user XXX\YYY has successfully established a link to the Remote Access Server using the following device: Server address/Phone Number = XXX.YYY.ZZZ.KKK Device = WAN Miniport (PPTP) Port = VPN3-4 MediaType = VPN. CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The link to the Remote Access Server has been established by user XXX\YYY. CoId={742CB15C-A7E0-47B7-8240-0EFA1139CBD9}: The user XXX\YYY dialed a connection named ZZZ which has failed. The error code returned on failure is 806. Running Wireshark on the client shows it trying and retrying to send a "71 Configuration Request" While the server shows the incoming client requests, but apparently without replying: Given that this is GRE traffic, I think rules out the GRE traffic being blocked. Question is, why doesn't the server reply? This is the Configuration Request the server receives from the non functioning client (meaning no response is sent to the client request): And this is the Configuration Request the server receives from the working client: To me they seem identical, except for differing keys and magic numbers, and the fact that one client receives a response while the other doesn't.

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• Sybase ODBC connection String with .net

  - by nitinkhanna

  Hi, I am having SYBASE 12.5 install on my server as well as my PC, I am unable to get the correct connection string. I have used the connectionstrings.com but unable to get the correct one. After runnig and making the connection Driver={Sybase ASE ODBC Driver};srvr=server_name;database=database_name;UID=user_name;PWD=pass; and some other combination of thic connection string I am getting the Datasource ="" Driver ="" DataBase="" ServerVersion = Invalid Operation. Connection is closed What am I suppose to correct in that. Please help. Thanks

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• SSTP client disconnects shortly after successfully connected to VPN

  - by Eran Betzalel

  I'm successfully authenticating and connecting to a SSTP VPN (on windows 2008) from my windows 7 machine, but for some reason, the connection is disconnected about a 1-2 seconds after it's established. I've done the following: Defined a SSTP VPN on my windows server 2008. Defined the same machine as CA. Issued the needed certificates and published them on the client. I'm currently testing this VPN inside my LAN so all the needed ports are opened. Here are the event log entries when trying to connect: Error Log (Client): The user HOME\User dialed a connection named Home VPN which has terminated. The reason code returned on termination is 829. Error Log (Server-VPN): The user HOME\User connected on port VPN0-0 on 7/27/2012 at 1:57 AM and disconnected on 7/27/2012 at 1:57 AM. The user was active for 0 minutes 0 seconds. 312 bytes were sent and 4528 bytes were received. The reason for disconnecting was user request. What would be the issue? How can I resolve or debug it? UPDATE: I've found an event log (Log=System, Source=RasSstp) message on the windows 7 machine that tries to connect to the VPN: The SSTP-based VPN connection to the remote access server was terminated because of a security check failure. Security settings on the remote access server do not match settings on this computer. Contact the system administrator of the remote access server and relay the following information: SHA1 Certificate Hash: 065D681...520375552F SHA256 Certificate Hash: 18DED363...EEEE28CFD00

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• Accessing network shares on Windows7 via SonicWall VPN client

  - by Jack Lloyd

  I'm running Windows7 x64 (fully patched) and the SonicWall 4.2.6.0305 client (64-bit, claims to support Windows7). I can login to the VPN and access network resources (eg SSH to a machine that lives behind the VPN). However I cannot seem to be able to access shared filesystems. Windows is refusing to do discovery on the VPN network. I suspect part of the problem is Windows persistently considers the VPN connection to be a 'public network'. Normally, you can open the network and sharing center and modify this setting, however it does not give me a choice for the VPN. So I did the expedient thing and turned on file sharing for public networks. I also disabled the Windows firewall for good measure. Still no luck. I can access the server directly by putting \\192.168.1.240 in the taskbar, which brings up the list of shares on the server. However, trying to open any of the shares simply tells me "Windows cannot access \\192.168.1.240\share You do not have permission to access ..."; it never asks for a domain password. I also tried Windows7 native VPN functionality - it couldn't successfully connect to the VPN at all. I suspect this is because SonicWall is using some obnoxious special/undocumented authentication system; I had similar problems trying to connect on Linux with the normal IPsec tools there. What magical invocation or control panel option am I missing that will let this work? Are there any reasonable debugging strategies? I'm feeling quite frustrated at Windows tendency to not give me much useful information that might let me understand what it is trying to do and what is going wrong.

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• Windows Authentication behaves oddly when VPN'd

  - by Dan F

  Hi all 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. It doesn't work so well if we're VPN'd to a client site though. SSMS Opening SSMS normally from the start menu, then picking a server that normally accepts windows auth, results in a message saying: Login failed. The login is from an untrusted domain and cannot be used with Windows authentication. (.Net SqlClient Data Provider) If I drop to a command prompt and use runas /user:domain\user to launch SSMS I can successfully windows auth to our SQL server instances with that ssms process. If I look in task manager, both copies of ssms.exe (start menu vs runas) have the same user, and I can see no discernible differences between the processes in procexp. AD Auth websites If I open IE and browse to any of our websites that require an authenticated windows user, I get the "who are you" prompt, and that dialog thinks I'm whoever the VPN user is. I can click "Use another account" and authenticate that way though. Outlook Even Outlook prompts for a username when we are VPN'd! It's affecting our Win7 and Vista machines. It's been a while since we had an XP box, but I don't recall having this issue on XP for what it's worth. The VPN connections are just using the built in windows VPN connections, they're not fancy cisco VPNs or anything of that nature. Does anyone know how to tell windows that I'd like to be my normal old primary domain user rather than the VPN user when authenticating to resources in our domain? Heck, I'd be happy with a solution that prompted me with the "who are you" if I was trying to access windows auth requiring resources on the client's VPN. Thanks! Apologies if this is more a superuser question, I wasn't sure which site it best suited. It's about networking and infrastructure and plagues all of our developers here, so I hope it's a serverfault Q.

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• Accessing network shares on Windows7 via SonicWall VPN client

  - by Jack Lloyd

  I'm running Windows7 x64 (fully patched) and the SonicWall 4.2.6.0305 client (64-bit, claims to support Windows7). I can login to the VPN and access network resources (eg SSH to a machine that lives behind the VPN). However I cannot seem to be able to access shared filesystems. Windows is refusing to do discovery on the VPN network. I suspect part of the problem is Windows persistently considers the VPN connection to be a 'public network'. Normally, you can open the network and sharing center and modify this setting, however it does not give me a choice for the VPN. So I did the expedient thing and turned on file sharing for public networks. I also disabled the Windows firewall for good measure. Still no luck. I can access the server directly by putting \\192.168.1.240 in the taskbar, which brings up the list of shares on the server. However, trying to open any of the shares simply tells me "Windows cannot access \\192.168.1.240\share You do not have permission to access ..."; it never asks for a domain password. I also tried Windows7 native VPN functionality - it couldn't successfully connect to the VPN at all. I suspect this is because SonicWall is using some obnoxious special/undocumented authentication system; I had similar problems trying to connect on Linux with the normal IPsec tools there. What magical invocation or control panel option am I missing that will let this work? Are there any reasonable debugging strategies? I'm feeling quite frustrated at Windows tendency to not give me much useful information that might let me understand what it is trying to do and what is going wrong.

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• Mac OS X L2TP VPN won't connect

  - by smokris

  I'm running Mac OS X Server 10.6, providing an L2TP VPN service. The VPN works just fine when connecting from all computers except one --- this one computer stays at the "Connecting..." stage for a while, then says "The L2TP-VPN server did not respond". In the console, I see this: 6/7/10 10:48:07 AM pppd[341] pppd 2.4.2 (Apple version 412.0.10) started by jdoe, uid 503 6/7/10 10:48:07 AM pppd[341] L2TP connecting to server 'foo.bar.baz.edu' (256.256.256.256)... 6/7/10 10:48:07 AM pppd[341] IPSec connection started 6/7/10 10:48:07 AM racoon[342] Connecting. 6/7/10 10:48:07 AM racoon[342] IKE Packet: transmit success. (Initiator, Main-Mode message 1). 6/7/10 10:48:08 AM racoon[342] IKE Packet: receive success. (Initiator, Main-Mode message 2). 6/7/10 10:48:08 AM racoon[342] IKE Packet: transmit success. (Initiator, Main-Mode message 3). 6/7/10 10:48:08 AM racoon[342] IKE Packet: receive success. (Initiator, Main-Mode message 4). 6/7/10 10:48:08 AM racoon[342] IKE Packet: transmit success. (Initiator, Main-Mode message 5). 6/7/10 10:48:11 AM racoon[342] IKE Packet: transmit success. (Phase1 Retransmit). 6/7/10 10:48:14 AM racoon[342] IKE Packet: transmit success. (Phase1 Retransmit). 6/7/10 10:48:17 AM racoon[342] IKE Packet: transmit success. (Phase1 Retransmit). ...and the "retransmit" messages continue until the error message pops up. So far I've unsuccessfully tried: rebooting deleting the VPN profile and recreating it verifying the client's internet connection (it is able to reach the VPN server) connecting through several different networks (in case a router was blocking VPN packets) disabling the Mac OS X Firewall on the client making sure that the VPN settings exactly match those of other working computers running software update (the client is on 10.6.3) Any ideas?

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