Questions tagged [vpn]

This tag is applied to questions related to various VPN types such as PPTP or IPSec.

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244 votes
14 answers
45k views

My college is forcing me to install their SSL certificate. How to protect my privacy?

My college administration is forcing us to install Cyberoam Firewall SSL certificate so that they can view all the encrypted traffic to "improve our security". If I don't install the certificate than ...
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  • 2,151
125 votes
7 answers
45k views

My ISP uses deep packet inspection; what can they observe?

I found out that my ISP does deep packet inspection. Can they see the contents of HTTPS connections? Wouldn't having HTTPS ensure that they can't see the contents being transferred? And can having a ...
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123 votes
12 answers
24k views

Is there a legitimate reason I should be required to use my company's computer? (BYOD prohibited)

I just got a new job at a medium-sized (~100 employees) company and one of the first things I was told is that I cannot use my own computer, because I need to be able to connect to their network, ...
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72 votes
3 answers
28k views

symmetric encryption session keys in SSL/TLS

This question concerns the session send and receive keys used in SSL/TLS protocol. my understanding is that this key uses symmetric encryption (DES, AES, BlowFish, etc.) I'm wondering, if public-...
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  • 1,190
71 votes
6 answers
59k views

Differences between using Tor browser and VPN

I can't quite figure out the differences between using the Tor browser and using a VPN (like concretely proXPN). From what I understand the idea is the same, that they both hide the IP address. The ...
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  • 3,841
68 votes
8 answers
137k views

What is the difference in security between a VPN- and a SSL-connection?

I would like to design a client-server application where the server is placed on Internet. I assume that I could set up the client-server connection using VPN (is it using IPSec?) or using a SSL ...
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  • 5,053
62 votes
6 answers
244k views

If I use a VPN, who will resolve my DNS requests?

Will they be resolved by my VPN provider, or by my original ISP (if left on "automatic" settings)? Would I have to manually configure a dns server, to make sure my requests will not be resolved by my ...
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61 votes
6 answers
133k views

Anonymity on Facebook - how do they suggest people I should know?

I want to know how Facebook discovers the people who you know in real life or who know you. I tried the following to see if Facebook can still discover my acquaintances in real life and suggest them ...
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57 votes
9 answers
157k views

How does Google Maps know where I am, when I'm using a VPN?

How does Google Maps determine my location? I've gotten some understanding of Google Maps' geolocation methods from here: http://friendlybit.com/js/geolocation-and-google-maps/ In the newer ...
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  • 673
53 votes
5 answers
8k views

Is there any way for my ISP or LAN admin to learn my Gmail address as a result of me logging into Gmail's web interface through via their network?

The title says it all, really. I'm Alice, and I want to login to Gmail's web interface through my browser. Ike, the internet service provider, and Adam, the local network administrator, would like to ...
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  • 541
52 votes
8 answers
22k views

Can an open Wi-Fi hotspot be considered "secure" when using a VPN connection?

There are many open Wi-Fi hotspots scattered around from cafes to airports. I understand that a non-passworded Wi-Fi leaves traffic unencrypted and therefore available for hackers to read. I also ...
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  • 3,041
51 votes
7 answers
16k views

VPN + HTTPS = 100% anonymous?

Let's say I visit Twitter using HTTPS and a VPN First, I know that HTTPS is end-to-end encrypted, so no one except Twitter can know what data is sent, not even the VPN provider. Second, I know that ...
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  • 611
46 votes
8 answers
118k views

How can you be caught using Private VPN when there's no logs about who you are?

I know there are 2 services of VPN (free and paid). Normally, free VPNs need money from somewhere and sometimes they can sell your information to any agency that needs it. Now, if we are talking about ...
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  • 803
45 votes
4 answers
9k views

How can html5 geolocalisation bypass my vpn?

About two months ago I've decided to use a VPN all the time (it's launched at startup) for various reasons, privacy being the first one. But recently I realized that if you agree to share your ...
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  • 451
42 votes
5 answers
138k views

Connect through two VPN clients

What exactly happens if I connect through two VPN clients on my laptop? For example, I connect using Cisco Any Connect, and then use another VPN client (such as HotSpot Shield or proXPN) to connect ...
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  • 523
41 votes
3 answers
8k views

Can anti-virus/virus protection be used to spy on you? [closed]

I'm a complete noob when it comes to these subjects. But here goes... Let's say someone is using a VPN, TOR, or some other tool to enhance their privacy. As I understand it, you are discouraged from ...
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  • 509
39 votes
5 answers
155k views

What's the difference between VPN over TCP vs UDP?

My VPN provider gives me the option between using UDP and TCP for connections. According to this site UDP is faster over short distances. I'm on the same continent as my server, is that considered ...
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38 votes
5 answers
9k views

What does a website see if I am connected on my native IP and then enable my VPN?

As per the question. If I am connected to a website, streaming content from my native IP and I then enable my VPN, what does the website see?
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  • 397
36 votes
3 answers
100k views

IKEv2 vs OpenVPN

I want to ask you for information about the IKEv2 protocol for a VPN connection. I haven't found so much information on the web. I am interested especially regarding the usage on a mobile phone. Is it ...
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  • 361
33 votes
7 answers
10k views

If I'm currently on a website and disable my VPN, is my ISP or the web server immediately aware of the change or does a page refresh have to occur?

For example: I'm browsing my favorite website with my favorite VPN enabled. I disable my VPN while I'm still on a page of the website. I haven't clicked any links yet, I haven't went back to the ...
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33 votes
1 answer
20k views

Why is Home --> VPN --> Tor worse than Home --> Tor?

I've read lot of questions asked on various websites about the pros & cons of using a VPN with Tor. As said on Tails website VPN make the situation worse by introducing a permanent entry guard or ...
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  • 650
32 votes
6 answers
7k views

How safe are employee laptops in China against International corporate espionage?

I recently took a business trip to China. Our IT department told me I could not take my normal machine, and instead gave me a loaner. This loaner had MS Outlook and was linked to my normal company e-...
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  • 2,022
32 votes
1 answer
73k views

OpenVPN Tap vs Tun Mode [closed]

I would like to know practical difference between TAP and TUN mode when use with OpenVPN. When to use TAP and When to use TUN ? What types of traffic will pass with both mode ?
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29 votes
3 answers
40k 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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  • 293
27 votes
3 answers
7k views

What are the advantages of paying for a VPN service as opposed to hosting your own?

For a person looking to use a VPN solution for personal use, what are the pros and cons of paying for a VPN service as opposed to just hosting a VPN on your own rented, in the cloud server, except for ...
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  • 373
27 votes
7 answers
14k views

Safe to make a VPN connection over coffee shop WIFI?

On my work laptop I regularly create a VPN connection that I use to remote desktop to our web server. Is this safe to do on a coffee shop where random people are connected to the same wifi network?
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  • 8,145
26 votes
1 answer
8k views

What are darknets, and how can they be used to provide security and anonymity in network communication?

One of the major problems with the internet is that it's difficult to stay anonymous while retaining the ability to communicate with a large number of people. While encryption can be done effectively ...
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25 votes
5 answers
54k views

What are the pros and cons of a VPN for privacy

Recently I have been getting more and more interested in the security (privacy and anonymity) issues of my online life. Not that I have anything to hide, or that what I do online is so interesting to ...
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25 votes
2 answers
50k views

How can I tunnel through an SSH server for application layer protocols such as HTTP/s and FTP?

Are there client programs that allow me to "tunnel" through my SSH enabled server for normal Internet requests such as HTTP(s)? If so what are they and can someone point me in the right direction? ...
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25 votes
9 answers
19k views

What's the best way to make my internet traffic anonymous?

Recently I have thought more and more about how to make my Internet traffic anonymous. Not for illegal reasons, but just to stop leaving information about me. The methods I know of to anonymize my ...
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  • 251
24 votes
5 answers
11k views

Can a VPN Provider MitM my SSL traffic without me noticing?

If I connect to lets say gmail over a VPN. How does the provider forward the traffic without exposing my IP, but also without breaking the SSL. Shouldn't gmail know my real IP if the traffic just gets ...
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24 votes
1 answer
5k views

Could logless VPNs be traced?

Logless VPNs, such as ExpressVPN, claim that they can't tell authorities your real IP even if asked. They claim: No connection logs. Never logs connection timestamps, session duration, your ...
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  • 259
24 votes
4 answers
4k views

IPsec (Internet Protocol Security) facts

Internet Protocol Security (IPsec) is a successor of the ISO standard Network Layer Security Protocol (NLSP). What are the advantages, disadvantages, other interesting facts regarding the protocol?
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22 votes
9 answers
5k views

How do I pick a VPN provider?

There's a lot of VPN providers out there. Some are free, some are for a fee, some report logs to the government, some inject ads into your HTTP, some are in other countries, you might not have any ...
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  • 5,184
21 votes
2 answers
37k views

How safe is it to connect to Internet through VPN?

Sometimes I connect to the Internet using a VPN connection to be able to access the blocked websites. I've got a few questions regarding this: Are my important data (like my credentials) vulnerable ...
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  • 313
21 votes
2 answers
41k views

Do VPNs provide sufficient protection over public wireless networks?

I know that VPNs are the standard way to secure communication between a remote user and their primary network, but I've never felt entirely comfortable relying on them when using an open wireless ...
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  • 433
20 votes
4 answers
3k views

Is a VPN really required with free Wi-Fi on a train?

Our local train service has added free Wi-Fi. I have been checking GMail and logging into a few apps. Then logging into websites using HTTPS. Is this secure, especially if done via app? The network ...
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  • 301
20 votes
7 answers
5k views

Can I trust DNS servers?

If I use my own VPN and use third party DNS - can I trust it? For example, is there any possibilities that an attacker can track the requests by contacting the DNS-hosting (assume that attacker have ...
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  • 497
19 votes
4 answers
81k views

VPN tunnel inside other VPN tunnel

This question is kind of asked already but it was asked with different context: VPN tunnel in VPN tunnel Connect through two VPN clients https://superuser.com/questions/763433/tunnel-in-a-tunnel-...
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17 votes
8 answers
69k views

Is it possible to Identify a VPN user by finding relations in traffic?

If I am using VPN service to protect my identity, can my traffic be used to identify all my traffic? For example, if I am accessing two services: Some service A, where I do not leave any ...
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17 votes
2 answers
32k views

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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  • 275
17 votes
3 answers
4k views

Is my phone carrier monitoring my traffic?

Today I started using a VPN on my phone (nexus 5), and after I switched on mobile data and turned off my WiFi, I received a text message from my carrier offering me roaming packages for Europe (which ...
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  • 171
17 votes
2 answers
3k views

Can my ISP see which VPN protocol I am using?

I know that my ISP can detect when I am using a VPN, but can it see which protocol I am using?
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  • 171
17 votes
3 answers
7k views

Setup a private VPN for family in China?

I have family in China. During the past weeks their internet connection was severely limited. VPNs such as Astrill and similar weren't working anymore. Is it possible to setup my own VPN (or ...
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17 votes
3 answers
2k views

Does using a VPN protect against KRACK?

Does using a VPN protect against KRACK? How does this work? How can it be bypassed? I use a commercial VPN on my laptop and on Android. Is an OpenVPN connection to your home a good way to protect ...
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  • 7,359
16 votes
4 answers
7k views

Security risk of connecting to two networks simultaneously

My employer issues a list of security recommendations when using a work laptop outside of the work network. The security recommendations are related to such risks as data theft, viruses, or other ...
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  • 1,829
16 votes
5 answers
47k views

Multiple VPN clients in parallel

If I were to run more than one VPN clients on my machine, simultaneously, what risks would be involved? E.g. are there technical conflicts, such that it wouldn't work right? Could there be ...
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  • 72.1k
16 votes
1 answer
2k views

How was the Apple Hacker caught? How can meta data be used to identify users through chained VPNs?

Online privacy is a big issue for many people nowadays. Using VPNs is the usual suggestion as a means to stay anonymous. More often than not, somebody comes up with the point "just chain multiple VPNs ...
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  • 9,490
15 votes
4 answers
3k views

Is personal information secure if two VPNs are used? [duplicate]

I’m using a free VPN service called Speedify (used in load balancing two networks). I’m worried it they might be listening to personal data transfers (like login IDs etc.). So I installed another VPN ...
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15 votes
2 answers
5k views

HTTPS vs VPN - which is more secure

I understand that end-to-end VPNs (such as SurfShark and NordVPN) hide the domains I visit whereas HTTPS does not However, are they any attacks that an HTTPS website would be subject to, that could be ...
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