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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Trace large volume of web traffic, stopped at VPN

I have a web server. I recently received a large volume of web traffics, after tracking it down, it is coming over a commercial VPN provider. Is there any way to keep the tracing going, beyond the ...
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What information is exposed by simply opening an RDP connection to the internet?

Microsoft, Rackspace and other hosted providers allows people to RDP into that server. Here are a few examples: Microsoft has something called "Azure Connect" it is very easy to expose a domain ...
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Does using a VPN completely stop MITM (man in the middle) attacks? If not, what other defences should I consider?

Just for added context, I am curious about connecting to a remote desktop using a VPN but if there are any major differences that can be highlighted for other services I would be interested in that ...
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Can a website detect my local WIFI network I am in?

I have two computers, both of them locate at the same local WIFI network ( ie: connected to the same router). I use VPN on a computer to visit a website, and don't use VPN on another to visit the ...
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How can I detect a VPN connection (even just in some cases) to get the real location of the user

I'm creating a web site, I would like to allow people to sign-up only from their "real" physical location (not using a VPN). I was thinking maybe comparing local and server time... what else...? ...
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What's the safest way to access my US-based bank's website from within Mexico? VPN vs SSH vs HTTPS?

I will soon be moving to Mexico and living there for an extended period. During that time I will need to occasionally access my US-based bank's website. I'll always be connecting using my own laptop, ...
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VPNs vulnerable to MiTM because ANY certificate goes

I spoke to a sysadmin in a business center today who intended to basically perform a MiTM (as he called it) on every connection in his network because people in his office building are using VPNs and ...
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333 views

Risk of spyware on seized devices

This question (Prevention measures against laptop seizure at US borders) addresses a number of techniques for securing data while crossing borders. Perhaps the most useful advice was to simply not ...
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311 views

How does the predator network prevent outside control by an attacker?

I read several articles saying some of the command and control fleet for the US robotic attack planes may have been infected with a virus. Does this command and control system communicate with the ...
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Is EAP-MSCHAP v2 secure?

I am in a process of enforcing more strict VPN access policy after learning about the attack on PPTP with MSCHAP v2. Basically this I will be disabling the traditional PPP authentication methods and ...
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160 views

How far a VPN service is legal? Does it makes my data vunerable for hackers?

Today, in Brazil, the government suspended by judicial requirement the WhatsApp application for 48 hours. It is a messaging app that works only via Internet connection (3G, 4G, WiFi...) and not by ...
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332 views

Does a separate internet connection increase security for remote users?

Our network admin has requested that a single remote employee purchase a separate modem in their house for "work" traffic. I question if this is a legitimate security practice of any kind especially ...
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How can I tell if a PPTP tunnel is secure?

PPTP has been demonstrated to be broken in many ways, and most installations are insecure. But it is also theoretically not broken if configured correctly. As an end-user, is there a simple way for ...
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237 views

How can I protect myself against DNS leaks?

As discussed here, a DNS leak is where DNS lookups ignore your current routing (in the example of a VPN connection) and still end up going out over your normal internet connection. This can ...
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5k views

How effective is the iOS “Send All Traffic to VPN” setting at deterring Wifi-based attacks?

iOS version 5 and newer has a setting for VPNs to "Send All Traffic" over that VPN. I think that sending all data to a trusted VPN target would ensure privacy of all communication sent over that WiFi ...
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Can remote LogMeIn Hamachi users access our local LAN?

Unknown to me, one of the kids has installed LogMeIn Hamachi on his PC so that he can access and play on his pal's Minecraft server, and vice versa. However, my lack of fu when it comes to these ...
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What is the difference between encrypted data and data sent through an encrypted tunnel?

I am looking at different VPN protocols. L2TP does not provide encryption so require IPSec to encrypt the data IPSec tunnel provide encryption to the tunnel What is the difference in terms of the ...
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136 views

Does a VPN provide any security benefits over sshuttle or a vanilla ssh tunnel?

I use sshuttle to tunnel my traffic through one of my remote boxes whenever I'm in a cafe or connected to an insecure network. Does a VPN provide any additional security benefit over this kind of ...
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What can my university see if they have my MAC address?

when i first got to my university i had to provide my MAC address to get access to the internet. What i want to know is what information can they get from having my MAC address linked to my name. i ...
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Is it possible to locate Tor/proxy users? Spam is getting on my nerves

I'm managing a huge forum (over 15k posts and 500 users) and lately some guy uses a VPN (probably) to spam my forums with topics such as: "GAYGAYGAYGAYGAYGAYGAY" "FRIGHT IS GAY HAHAHAHHAA" "ADMINS ...
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375 views

Does the principle of the CRIME & BEAST attack affect VPNs?

I was recently reading about the attacks on SSL/TLS that CRIME and BEAST were able to exploit by attacking the compression in the secure session. Upon reading this I remembered that OpenVPN has ...
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2k views

Ways to monitor someone's internet traffic

If some authority for whatever reason decides they want to monitor your traffic on a wired DSL connection, how would they do it besides exploiting your OS? What are the other ways assuming the OS is ...
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Are firewalls required if using a VPN [closed]

If you are using a VPN to transmit data from router to router, do you still need a firewall? I am using a VPN Server to encapsulate data from one cisco router to another. Do I need to have a firewall ...
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477 views

How safe can connecting to VPN really be?

I would like to make this story as short as possible since my question is not that long, I have worked with journalists previously in war zone where we investigated the involvement of EU IT companies ...
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Encryption laws in India — is it allowed to use ssh and VPN?

I have a very similar question to the one asked here (regarding Iran). However, I would like to use ssh and vpn while being in India. I found already this survey of cryptographic laws but I don't ...
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534 views

PCI DSS - VPN network?

My network is segmented into internal (which holds private cardholder data), DMZ and VPN. There is a gateway in between which restricts access, for example: VPN: 10.0.0.0/24 DMZ: 10.1.0.0/24 INT: ...
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Pros/Cons to OpenVPN vs “VPN over OpenSSH”

What are the major differences between using OpenVPN and using VPN over OpenSSH? Does adding a virtual tunnel interface to a SSH connection offer the same benefits of OpenVPN? Can PuTTY be used on ...
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Disadvantages of Using a VPN?

I've got a yearly subscription to a VPN service which is real quick and from the research I did at the time seems to be pretty legitimate, but are there any disadvantages or scenarios where you ...
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TLS v1.0 best cipher for OpenVPN setup

I'm trying to setup OpenVPN with as much security as I can. I'm in the process of selecting a cipher for OpenVPN. Which is the safest one, tls-cipher DHE-RSA-AES256-SHA or tls-cipher AES256-SHA? I've ...
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How is a website determining my location even via VPN? [duplicate]

I'm currently in China, and accessing the Internet via a VPN in the USA. When I access Google maps or other location-based web services, they all show my location as that of the VPN server. However, ...
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506 views

Security risks of leaving open a VPN connection

We have older firewalls that don't allow for scheduling up/down times of VPN connections, and we're working with a client that will need to connect to it at different times each day. What are the ...
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851 views

Is using VPN, Tor and ProxyChains together more secure?

Similar question (Tor and VPN only). All these three technologies seem to share the same goal, i.e. making internet traffic anonymous. Does it make any sense to try to use them together to increase ...
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SSL VPN Detection and possible to block

Is it possible to determine the difference between a VPN on port 443 compared to standard SSL traffic? In order to access SSL websites you need port 443 open but if you setup a VPN Service on port ...
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OpenVPN Why CBC mode is recommended?

I just set up my installation of OpenVPN on my server. I am curious why the OpenVPN manual recommends CBC mode. I heard that CBC is predictable and not secure; is that true?
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Does the password you use to sign into a VPN determine the strength?

I subscribed to a VPN service and need to change the password. Does the password I use to log in determine the strength? For example should it be 64 characters long or can it be 10? I'm thinking of ...
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1answer
553 views

What level of anonymity do VPNs provide?

When I use VPN is entire Internet usage protected or only some subset of traffic? For example, Is my IMAP email provider only going to see VPN's IP address? Is my DNS provider only going to see ...
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When is it posible to sniff VPN traffic?

I have created a VPN service using Routing And Remote Services on Windows Server 2008 and I haven't configured any Server Network Policy yet. There is only one user for connecting to VPN and all of ...
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3k views

Is L2TP as secure as IPSEC for VPNs?

Is it as secure to use L2TP for VPN access, rather than IPSEC? Am I introducing any risks by using L2TP?
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491 views

Prevent location being exposed through VPN

I use the Astrill VPN service to access websites that my country has blocked. There is nothing sinister going on here. Sites like google and youtube have all been blocked. This VPN service offers ...
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272 views

Does using NAT-T for L2TP / IPsec VPN pose a realistic security risk?

I'm working on upgrading an old Windows RAS server that hosts PPTP VPN. I want to move to a L2TP/IPsec VPN. Due to the firewall appliance we use, the VPN server has to be behind a NAT. This means ...
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301 views

Store To Store communication through MPLS VPN

In a PCI environment with an MPLS VPN network setup should you allow store to store communication? Do you think that an MPLS network would be consider secure enough for this? why or why not?
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Are there consumer-grade VPN services that support two-factor authentication, like SecurID?

I'd like to increase my VPN security, and Google hasn't turned up anything with regard to VPN services and SecurId. Does anyone know of services like this?
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Chaining VPNs to increase privacy?

I was wondering if it's possible to chain many VPNs, and if it is, if it increases privacy at all? My thinking was that each country has data retention laws. If all VPN keep logs (even if most lie ...
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867 views

What is important when selecting a VPN provider?

I am new to using a VPN service and came across the past at How do I pick a VPN provider? however am unsure if I need to use a personal VPN service or if OpenVPN fits my needs which are as follows; ...
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1answer
405 views

Can IPs be trusted inside a VPN?

Question I have several linux clients connected to an OpenVPN server. Each client is given a persistent IP based on their X509 Common Name. Can I trust these IPs ? Context I have Client1 and ...
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829 views

SSL vs IPsec what's the difference [duplicate]

Possible Duplicate: What is the difference in security between a VPN- and a SSL-connection? Which is more secure? And offer better access control?
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How can an outsider tap into communications between two physical sites?

When referring to 'Sites' - I am not talking about a website, but of a physical place where a company resides. Today, to secure communications between two sites - Let's say between an office in ...
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Could I delete .csr files when the key is signed by CA

I'm creating my own openvpn server. The Certificate authority is located on a separated host. There is two kind of clients: which that just send a .csr and to which i send the .crt as an answer and ...
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Are VPNS vulnerable to active man in the middle attacks?

I know that with SSL/TLS, man in the middle attacks are not possible. For example if Alice and Bob are trying to communicate and Trudy is trying to perform a man in the middle attack, then when Alice ...
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376 views

The safest way to circumventing Iran's Internet censorship

We usually buy services like VPN, SOCKS, Kerio [Kerio Connect?]... to circumvent Iran's Internet censorship policy. Recently, one of the shops started selling [one of] Kerio's products, for which I do ...