The word "proxy" is mostly used as short for "proxy server", which is a server that acts as an intermediary between a workstation user and the Internet so that the enterprise can ensure security, administrative control, and caching service.

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What security risks are posed by software vendors deploying SSL Intercepting proxies on user desktops (e.g. Superfish)

There has been quite a bit of concern noted relating to the recent discovery that Lenovo are pre-installing a piece of Adware (Superfish) which has the capability of intercepting SSL traffic from ...
35
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9answers
27k views

Can my company see what HTTPS sites I went to?

At work my company uses internet monitoring software (websense). I know if I visit a https ssl-encrypted site (such as https://secure.logmein.com) they can't see what I'm doing on the site since all ...
18
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3answers
14k views

Authenticating a Proxy server over HTTPS

When browsing to a website over HTTPS, the web browser typically does a lot of work in the background - negotiating a secure channel, validating the site's certificate, verifying the trust chain, etc. ...
17
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6answers
2k views

Anonymous web browser. Is it real?

Do anonymous browsers work? What principles do they use? Can I use them to test access to my web site? Can I detect if a visitor is using one? What is the different between traditional and anonymous ...
17
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4answers
15k views

Does using an http proxy completely hide my real IP address?

If I obscure my IP by going through a free http proxy and visit a page, will that site's admin ever be able to find out my true IP or anything related to my true connection/info?
13
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1answer
5k views

Is SOCKS secure?

In order to create a VPN, I open an SSH tunnel with a command like ssh -D 9000 user@host, and then I set my system's proxy settings to use SOCKS5 through localhost:9000. Well, setting up my home ...
12
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4answers
2k views

Can real end-to-end SSL encryption be made?

I've read the various questions tagged [ssl] and [mitm] and [proxy] and I couldn't find a duplicate. I've got a very precise question but first I need to give some background. Basically I'm very ...
11
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1answer
783 views

Is Nokia's “institutional MITM” of SSL traffic vulnerable to CRIME attack?

It's recently been in the news that some Nokia phones proxy all traffic, including SSL connections, through a Nokia proxy. This is effectively an "institutional MITM" attack on users those phones. ...
10
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6answers
427 views

Should we configure all devices to never request SSL 2.0, and reject it if offered?

In an effort to reduce man in the middle attacks, when will it be (or was it) an industry accepted practice to reject SSL 2.0 connections on the client and server side? Is configuring this on a proxy ...
10
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4answers
4k views

How effective are reverse proxies as a web application security measure?

How effective are reverse proxies as a web application security device? Which types of threats do they mitigate against and which don't they? For example are they more effective in preventing ...
10
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3answers
6k views

Detecting Tor proxy by reading request headers

I am a newbie to the field of security. As I was trying to explore more about HTTP request and response headers, I came across this website which provides a detailed analysis of the request header ...
10
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2answers
2k views

Bypassing a reverse proxy/NAT

Reverse proxies and NAT would seem to obscure a network behind such technologies to the point where it would be hard if not impossible to identify ports open and services running. Given that many ...
9
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5answers
8k views

Is a Tor router really safer than a proxy?

If I use a Tor router to browse the regular internet that it has to leave the Tor network through an exit node. Apparently the exit node has all the information from the original user it came from on ...
9
votes
6answers
1k views

Getting credentials using proxy server

Is it possible to get the username and password we enter into sites like facebook using proxy server? The scenario is like this : 1.My laptop is connected to a network. 2.It is configured to use a ...
9
votes
2answers
863 views

HTTPS login vs MITM attack

http://www.troyhunt.com/2013/05/your-login-form-posts-to-https-but-you.html My question is, if the threat is that someone controls your internet connection and can serve up bad login pages, couldn't ...
9
votes
3answers
8k views

Proxy vs. Firewall

I understand that very simply put a proxy is a sort of 'man in the middle' allowing/denying access to certain services/resources. Strictly in terms of security (I mean here privacy, parental control ...
8
votes
3answers
1k views

How do I log all my internet-connections

How can I (maybe with a proxy, but I need names of programs!?) log all my interactions of programs with my Internet connection, so that I could see WHAT a program is sending and WHAT it is receiving. ...
8
votes
7answers
5k views

Does a chain of proxies (e.g. one connecting to another and another and so on) make tracing the original IP harder/impossible?

I see nobody here has asked this question. What if one, instead of just using a single proxy, connected a proxy-to-proxy in a very long chain and downloaded something (illegal) using secure packets ...
8
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3answers
3k views

SOCKS proxy security concerns

As claimed, "A socks proxy simply transfers data from a client to a server, not penetrating into this data contents (therefore it can work with HTTP, FTP, SMTP, POP3, NNTP, etc.)", I really can't buy ...
8
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4answers
24k views

Advanced techniques for detecting a proxy/getting original IP

In what manner can a website detect my original IP address, even though I'm using a proxy server? I've noticed this with a few sites. There are four proxy methods I've used: Firefox with a proxy ...
8
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5answers
1k views

Creating tunnel with most ports closed?

How can I create a proxy tunnel from a network that has all ports but port 80 closed? I guess I'd have to bind SSH on my server to port 80, but would that introduce problems to my home network since ...
7
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2answers
3k views

How can end-users detect malicious attempts at SSL spoofing when the network already has an authorized SSL proxy?

I'm working on one client's network where they have enabled HTTPS authority spoofing on their proxy. This allows them to effectively perform a man-in-the-middle attack to decipher all outgoing ...
7
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2answers
5k views

Is there anything like a known proxy server IP list/database?

I'm looking for something like a known proxy servers IP list (text, comma seperated or database based). Do you happen to know if anything like that exists? Free would be nice. I doubt it because these ...
7
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1answer
359 views

What Steps Does An Anonymous Artist Need To Take to Retain Anonymity? [closed]

I read these questions which had great information: How can I keep my identity anonymous as a website owner/administrator? and How much can I trust Tor?, however I wonder if this is too extreme for my ...
6
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4answers
2k views

How to keep secure while browsing on open wifi when SSL VPN is blocked?

After a recent visit to a hotel I was surprised to discover that they blocked access to my OpenVPN server. I often use this as a way to secure my internet traffic when I am on public wireless. ...
6
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3answers
5k views

Any good free SSL proxy on windows? [closed]

I'm looking for SSL proxy capable of dumping requests. I want to test custom browser against SSL-MITM attacks. I'm able to re-route all traffic ongoing from browser to machine with proxy. ...
6
votes
2answers
965 views

How does dnsleaktest.com find my DNS provider

Can't see how they find this over the web. I'm on Windows, its in my network config. It changes when I use a VPN provider, but not when I use a local socks proxy connected to a remote server over ...
6
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3answers
3k views

Man-in-the-middle Blue coat proxy ssl or what?

I have just discovered that my workplace have enabled some new feature in the blue coat network proxy. It seems like all https certificates in chrome on windows is being issued by this internal ...
6
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1answer
4k views

How is tunnelling SSH through Poxytunnel/HTTPS different from doing it through SSL with Stunnel?

In an answer to What is the difference between SSL, TLS, and HTTPS, it's said that HTTPS is HTTP over SSL/TLS. That is, an SSL/TLS connection is established first, and then normal HTTP data is ...
6
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2answers
5k views

Securing remotely accessible IP cameras that do not support HTTPS

I have some IP cameras set up on my home network, which is WPA2 protected. These cameras are setup to be accessible from the Internet thru my router's DDNS address, and port number. So for example, ...
6
votes
7answers
1k views

HTTP Proxy vs bump-in-wire

If I'm an administrator of a corporate network, I could use an HTTP proxy to examine outgoing connections to monitor what websites my employees are going to, and terminate connections based upon ...
6
votes
2answers
4k views

Is it possible to connect to a proxy with an ssl (or otherwise encrypted) connection?

What i want to know is whether it is possible to connect to a proxy with an ssl (or otherwise encrypted) connection? (I'm suspecting this is possible because TOR encrypts user connections to it's ...
5
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6answers
3k views

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 ...
5
votes
3answers
5k views

How do I check that I have a direct SSL connection to a website?

I always thought that if I had an SSL connection there would be no MITM attacks. Now it appears that isn't true (see comments in this question Is it okay from a security perspective to read foreign ...
5
votes
3answers
5k views

How trustable are third party root certificates?

I recently tried to use Fiddler2 from a third-party vendor Telerik. While decrypting the HTTPS traffic of my network, it asked me to install its own root certificate in my Windows operating system: ...
5
votes
4answers
1k views

MiTM - Non-HTTP TLS

I'm doing some research into the privacy of various iOS applications. My main source of data is via wireshark or Burp (HTTP/S proxy). This has been rather sucessfull for MiTM for decrypting HTTPS ...
5
votes
4answers
685 views

One time password over SMS - exposing the Authentication Server to the internet

Consider a Internet Based Website which does authentication. The Web Application can do the authentication by calling an Authentication Server which is not connected to the internet. The ...
5
votes
2answers
967 views

What is your approach to handling Guest Internet access?

Suppose you're a company that uses a web proxy to block objectionable content on your corporate network, and this technology may cause issues with some 3rd party VPNs. Or perhaps this 3rd party is ...
5
votes
3answers
3k views

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 ...
5
votes
4answers
1k views

Outbound proxy which whitelists by server certificate?

Short version: Are you aware of any proxy or firewall device which will permit outbound SSL connections to hosts with approved* SSL certificates only? Long version: Consider the following ...
5
votes
2answers
122 views

Is it actually feasible or useful to use a high number of proxy servers?

In the movies, it's not uncommon to see the digitized global map projected on a huge wall with a line of light (presumably a user's connection) travelling back and forth all over the globe in a ...
5
votes
1answer
912 views

Retrieving client certificate using Tcpdump results in zero length certificate

I am trying to proxy a mobile app (with Fiddler), which sends a client certificate to the server it connects to. I would think that capturing traffic with Tcpdump, retrieving the client certificate ...
5
votes
3answers
140 views

Solution to remain anonymous on a website that dismiss tor users?

I want to access to a website who recognize tor users and dismiss them. I have read that if you connect to a proxy after your tor exit node, the website wouldn't know that you are a tor user and ...
4
votes
3answers
342 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 ...
4
votes
2answers
3k views

Does Java applets reveal the real IP address, even when using proxy or vpn?

Can a Java applet reveal the original client IP address, when browsing through a proxy or a VPN? Why?
4
votes
3answers
9k views

How do you properly setup Tor on Windows 7?

How do you properly setup Tor on a Windows 7 box to guarantee that ALL connections will run through Tor?
4
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1answer
3k views

Documented Best Practices for Reverse Proxy Implementation

I'm looking for some best practices documentation for implementation of a reverse proxy. We need to allow an internal database / web server incoming access to the outside world and are trying to ...
4
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1answer
87 views

Is it possible to trace a backend through a reverse proxy?

I'm creating a reference network topology for a WebSocket chat application at work, and I'd like to have something clarified for my own understanding. The current topology involves a reverse proxy ...
4
votes
1answer
1k views

HTTP Reverse Proxy: Correct way to do SSL to backend

If I have a HTTP reverse proxy that communicates with it's backends in an untrusted datacenter, or across datacenters, I would want to use HTTPS in the backend, as talked about here: Reverse Proxy ...
3
votes
2answers
910 views

Reveal the True IP of a User

Is there any best practice method (and preferably documented) way of revealing the True IP of a user using a HTTP(S) connection? I.e.: To be able to uncover the true IP from transparent as well as ...