a Virtual Private Network is a private network that is built upon a public network, typically using encryption for to secure the private communication.

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Are VPNs using shared secret susceptible to trivial MITM attacks

I'm looking at a few VPN providers and many seem to offer L2TP VPN but they seem to share their shared secrets publicly on their website, for example : Goldenfrog ...
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What's The Easiest Way To Maintain Remote Users Access to a Webapp

Here is a real world case: A chain of high schools (several hundreds) has many websites (~ 3x number of Schools) that are content driven by users (the students). Every school maintains about 2-4 ...
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How did these websites see through the VPN tunnel? [duplicate]

I'm using privateineternetaccess to VPN my internet connection. Recently I've noticed some web sites appear to know my real location and IP address. The most alarming incident I've seem to have been ...
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2answers
169 views

How to uniquely identify / tag client devices to whitelist VPN access?

I'm just wondering if there is any way to uniquely identify or tag client devices like laptops and towers in order to whitelist them for vpn access. (Note: This is a thought-experiment at the moment, ...
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938 views

Best practices for operating a Bitcoin-Qt client regarding netwok privacy?

As privacy is part of security, I know there is a Bitcoin SE here but they couldn't answer my question so I hope it's appropriate to ask it here. I don't ask about how to secure my wallet on my ...
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287 views

How am I able to use Input Director when one machine is VPN'd into work?

So - I don't actually have a problem, but I'm really curious, because apparently VPN's don't work the way I thought they did. It was my impression that when I VPN into my office, my computer is ...
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485 views

Protecting yourself from a malicious VPN

I am connecting to a VPN server that has been compromised and is under the complete control of an attacker. The virtual network itself contains numerous attackers waiting for a new target. What ...
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92 views

understanding the point of VPNs

I can't really understand the concept of VPNs, since we already have various secure transmission protocols. Isn't the point of VPNs that people using its 'channels' can send encrypted data to each ...
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2k views

How to sniff traffic on my wireless network?

For educational purposes, I want to see what packages are sent over my home wifi with VPN on and off. What program should I use for this?
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2k views

Is OpenVPN secure in this way?

I'm familiar with OpenVPN because my home router has a builtin OpenVPN server. I would like to use OpenVPN all the time, but how do I deal with situations where I don't own the routers? ex.: in a ...
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4answers
3k views

Can someone tell if you are using a VPN by your IP address?

I am wondering whether a website you are accessing can tell if you are using a VPN or not based on your IP address? I have done some Google research and it appears, that this is the case. However, I ...
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286 views

How do I ensure that a VPS host will keep my information private?

Basically, I want to use OpenVPN on a VPS to browse confidentially. However, I don't know much about VPS hosters and to me, it seems to be a hard choice because there are so many. However, I think ...
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602 views

Can people use AES VPN tunnels to hide their activities from authorities?

I have read an article about programmers who use AES VPN tunnels when working remotely with clients from other countries. The article writes that this way their countries are unable to track their ...
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1answer
168 views

Anonymous access over SSL

I am using a paid VPN service and I just realized IP privacy does not exist at all when the connection is made over SSL. If I Google "what is my ip" using the HTTP version of Google, it will give me ...
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1answer
81 views

Can I use a vpn to securely use prototypes of webapps from my phone or laptop?

I want to experiment with web development (using django) for both desktop and mobile. Server, phones and desktops could all be part of the same virtual private network. The VPN will be from some ...
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2answers
147 views

Questions on IDS, IPS, VLANs and VPN [closed]

I have a network that has a single point of entry the WAN. The WAN exposes about 10 static IP's that resolve internally to servers that are in the same subnet. Meaning that if you RDP over 3389 to ...
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2answers
54 views

Secure the Datacenter, untrust the LAN?

In a scenario where you have a Wireless network provisioned as untrusted behind a firewall, using VPNs to reach the trusted Datacenter. Does anyone have an reason why this should/not be expanded to ...
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664 views

VPN and Firefox proxy

What happens if I use VPN and then configure my firefox browser to use SOCKS proxy? Am I then behind both or just proxy?
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37 views

Repercussions of hacked router?

I am staying in Thailand right now on a "long holiday" to do some work on my laptop. A few weeks I noticed that at the condo where I am staying, sometimes I am redirected to ad sites. I researched it ...
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97 views

How to hide real IP from browsers while using VPN?

You probably know that even when you use a VPN service, browsers like Chrome and Safari can still somehow provide your real location to Google Maps etc (if you give it a permission). My question is: ...
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3answers
112 views

If someone has access to VPN and your computer, is there a point of using VPN?

If someone sniffs requests coming from my computer and my VPN's computer, there's no point using VPN, right? Because they can see the time when I made a request to my VPN and they can analyze all of ...
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1answer
101 views

Cellular Mobile Network Vulnerabilities - Is VPN the solution?

Do current mobile cellular networks like 3G offer enough security? The article from Info-Security states that 3G encryption cracked in less than two hours. Could a eavesdropper or ...
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1answer
166 views

Shall I enable 'send all traffic over VPN' on my Mac?

I want my Mac to be as secure as possible, but I don't know if the send all traffic over VPN option is safe or not. Please can someone explain if it is more secure to enable it or not.
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370 views

Is PPTP VPN ever secure? Under DD-WRT? [duplicate]

PPTP is not an open, ratified standard the way that, for example, SSL/TLS is. (see: http://en.wikipedia.org/wiki/Transport_Layer_Security#TLS_1.2 and http://datatracker.ietf.org/doc/rfc5246/ ) The ...
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184 views

Sniff HTTP(S) from PPTP VPN server

I've setup an PPTP VPN server on my Debian 7 server. I'm using this VPN in combination with my Android phone to ensure a secure connection. However, i'm getting curious of what my phone is sending ...
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1answer
710 views

What methods are there of protecting a VPS from DDOS attacks? [duplicate]

I was just wondering what would be the best way to stop a VPS from being attacked, bandwidth would be a problem in this case so methods that reduce the amount of incoming attacks and stop sending ...
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1answer
1k views

Are there any known vulnerabilities in PPTP VPNs when configured properly?

PPTP is the only VPN protocol supported by some devices (for example, the Asus RT-AC66U WiFi router). If PPTP is configured to only use the most secure options, does its use present any security ...
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2k views

Configure OpenVPN as a local proxy to use it only when needed

First, I think it is the proper place to post my question (and not serverfault or networkengineering). If not, please tell me what's the correct place. I used FreeGate. I configured the Firefox ...
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1answer
113 views

Does the VPN provider will have access to my content? [duplicate]

I am planning to buy a VPN service just to circumvent the filtering applied by the government. However as I am planning to use OpenVPN on my dd-wrt router, all of my data will pass through this ...
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2answers
169 views

A thought experiment about obfuscating the location of a smartphone when it is in use, is it possible? [closed]

I was thinking about how smartphones are very difficult to use in a way that does not transmit your location, with all the networks it has to connect to (and let's say a 'burner phone' is too ...
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1answer
76 views

VPN using SmartPhone Location

When you VPN using your smartphone as a hotspot, can the VPN tell your location like it can when you VPN over a wireless connection hotspot?
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2answers
560 views

Is a VPN the only way to protect against rogue Wifi access points MITM attacks?

Given that it's very easy set up a rogue access point and MITM that connection, is a VPN to a trusted host the only real way to secure my browsing and other TCP/UDP actions? This question relates to ...
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116 views

VPS logging issues?

So people recommend a VPS (cloud) offshore, in order to ensure that a VPN provider is not logging or doing anything malicious. But isn't VPN provider = VPS hosting company? There is still a third ...
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805 views

Protecting yourself against DNS spoofing?

Are there any things which the user can do, on their own machine, to protect against DNS spoofing? I was just thinking when I was at the airport last and I wanted to check my email I used a hotspot ...
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1answer
31 views

Vpn Vs Hotspot-Sheild

i have learning some basic stuff regarding intrusion/hack.to elaborate more a VPN is a virtual Network that is used to hide IP address of the attacker. A Hotspot sheild is also used to change IP ...
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31 views

Online collaborative team, connecting to 1 or more servers [migrated]

I have a team of partners working from different locations in the world. We all are connecting to our own VPS, as well as to a bunch of customers websites via http and ftp to other shared or vps ...
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25 views

MAC changer and VPN can be trusted? [duplicate]

I must spoof my identity for some reason. Are Technitium Mac Address Changer App on windows and VPN is a trusted way to be anonymous?
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1answer
42 views

PPTP and Split Routing

If I uncheck the "use default gateway on remote network" to be able to browse local shares and the internet at the same time, does that void encryption?
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1answer
318 views

Is there a way to get OS X to start a VPN connection before allowing network traffic? [closed]

I'm running OS X 10.8 and have Tunnelblick set up so I can connect to my OpenVPN server at home. I've also used this at $WORK in the past. When I'm out and about and want to jump on a public network, ...
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2answers
4k views

How can using a VPN increase network speed? [closed]

There are lots of guides online which suggest that using a VPN or proxy will gain better speed or 'free internet' however this seems unlikely. If my ISP is performing packet shaping on my connection. ...
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1answer
4k views

Is it safe to use TunnelBear VPN [closed]

Tunnelbear is a VPN with an easy interface to choose your country IP - https://www.tunnelbear.com/ On installation it installs a network service. When the app is turned off would it be able to ...
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1answer
6k views

How to install Cisco VPN Client on Windows 7 64bit [closed]

I have Win7 64bit. Have Cisco VPN Client winx64-msi-5.0.07.0440-k9. Now i try to install it. But after i click first "Next" button in istaller i get error: "installation ended prematurely because of ...
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1answer
139 views

Setting up a Secure Home Proxy for VPN Service Providers

VPN service providers such as ProXPN offer a service in which you pay a monthly subscription, allowing you to download an app for Windows or Macs so that your traffic goes to the internet via this ...
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1answer
85 views

Where else is IPSec used, besides with VPNs? [closed]

IPSec is most commonly used to secure VPN traffic. Where else is this protocol suite used? What else can it be used for?
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1answer
708 views

Is my information secure when using Private Tunnel? [duplicate]

I am using Private Tunnel to do some tasks involving sensitive data like logging in to PayPal and online banking. Is my data safe or can it be retrieved by other users of the Private Tunnel service?
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1answer
63 views

firewall settings for VPN

In my firewall settings there are options for "Allow VPN connections via PPTP" and "Allow VPN connections via L2tp-IPsec". All of my internet traffic goes through a VPN. Should I have these settings ...
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1answer
2k views

Is it possible to set up my own VPN using an ISP without having to open a 3rd party VPN account? [closed]

I have a home network and I would like to implement a VPN to the cloud. Is this possible without the ISP's cooperation in port forwarding? In other words, is my only option to use a 3rd party VPN ...
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1answer
162 views

How can I protect files on my personal home PC for when it is connected to my employers network via VPN? [duplicate]

I think my employer uses Citrix product to supply VPN. I have files in My Documents folder on my home PC that I would not want my employer to be able to access when I am connected over their VPN. I am ...
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1answer
1k views

Is my computer being hacked? How can wireshark reveal if I am being hacked? [closed]

So last night I was using openVPN via my personal cloud server to watch some Hulu. About 15 minutes into the movie I noticed my network stats were download: ~250 MB upload: ~1.8 GB This is ...
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3answers
225 views

Can a VPN connection established by running a VPN client from an arbitrary location guarantee security?

I came across this interesting device called SurfEasy Private Browser. Here's the company's webpage and here's the product page on Amazon.com. I assume it's just a USB stick with a VPN client and ...