A sniffer is a program that monitors and analyzes network traffic, detecting bottlenecks and problems.

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how to monitor a Wifi (802.11) network?

How to capture a sequential stream of data between two machines, making no assumptions about network layer protocols? On wired network, one can do it by ARP spoofing and then sniff the network. One ...
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Alternative to AirPcap for Linux?

I need to sniff WiFi packets, but according to AirPcap FAQ page, it just supports Microsoft Windows, not other platforms. Does any alternative of this product work in Linux? Please don't offer Alfa ...
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376 views

In a monitored network, can the admins tell if Tor is being used?

I'm not asking if Tor is secure, I'm asking if an observer can know you are using Tor? For example if a persons ISP or company network monitors traffic would they be able to determine with certainty ...
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352 views

How to secure a network (FTP connections) from sniffers

I'm actually working in a medium sized company with security concerns. Let me explain you my problem : The context: My office has one single internet line. This line is accessed by anyone in the ...
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How to use my WiFi to inspect its user traffic and to run MiTM attacks?

As part of a security research, I need to make my WiFi open, and to inspect the traffic of the ones who connect to it. Additionally, I need to be able to change the content of the webpages they see, ...
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269 views

Equipment required for sniffing data / address buses via EM emission

What kind of equipment would be required to sniff data from the electromagnetic emissions of data / address buses on an average motherboard? I'd imagine a sensitive hall probe, a faraday cage and ...
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96 views

Log all crypto keys used for outgoing SSL / TLS connections on Linux server

Is there some environment variable that works how SSLKEYLOGFILE works for NSS-reliant programs but which would apply to all outgoing TLS / SSL connections on a Linux server and not just ones that use ...
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95 views

Can cascaded routers protect inner network's machine from attacker from outer network?

Given: Outer Network router A wan ip 209.123.12.11 address 10.10.0.1 machine A address 10.10.0.10 gateway 10.10.0.1 Inner Network router B wan ip 10.10.0.100 address 192.168.10.1 ...
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148 views

How can someone sniff dial-up connection using phone line?

Let's assume we have a computer that sends packets to the internet using dial-up connection, and we have access to the analog data on the phone line(we have access to the phone line), how can we make ...
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356 views

Is it possible to obtain the login credentials submitted by users?

It's a question at computer security textbook Assume that user A is about to use some website that requires login credentials. User A starts his web browser, types the website’s URL, and submits the ...
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113 views

Sniffing 2400bps v22bis modem traffic

I am working with alarm signalling systems at the moment, and they communicate with 2400bps v22bis modems. I would like to be able to intercept the traffic on the phone line as a proof of concept. ...
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Which part of the eapol packets contain WPA password Hash?

I have captured wifi traffic from a WPA network using Wireshark. I filtered the results for "eapol" packets and noted in the info column there are message type 3 and type 1. I believe this is two ...
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688 views

Does Metasploit's packet sniffing run in promiscuous mode?

I'm doing an educational pen test exercise and I'm trying to sniff traffic from a compromised Windows machine. I've been using the post-exploitation sniffer and packetrecorder Meterpreter modules, ...
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400 views

How to sniff a data from an upstream router?

I am connected to my router and I want to know if it is a possibility to sniff a data from a router that is over my router?
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700 views

I recently discovered that dsniff had been installed on my computer. What do I do?

I have recently discovered that a co-worker (who has sudo privileges on my machine) has installed dsniff, and it has been there for a while. I have no idea when they ran it (if at all), the only ...
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228 views

How to sniff [possibly encrypted] TDS protocol data from the host the client application is installed on?

Let's say, there is an .NET application on a windows 7 host where I have administrator's access rights. The application works with remote MS-SQL server which I don't control, it also seems that the ...
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558 views

Which Wifi encryption method is secure?

you may wonder apple just removed ethernet port from new macbooks which means we have to use wifi! i made a wifi hotspot with my windows laptop to use for my macbook (my modem don't have wifi because ...
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Can anyone tell if a wireless router is plugged into an Ethernet port (without actually seeing it)

In a large network if there is an Ethernet port in the wall, is it possible to tell if a switch or wireless adapter is plugged into it? (I'm talking about the cheap home routers - with the built in ...
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TOR and sniffing data

If I'm not mistaken, TOR works opening a random anonymous path between two hosts using others computers that have TOR installed no? Then... everybody can sniff the data of the others no? Just wait ...
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How do governments carry out computer surveillance?

If https is really secure as companies tell us, how do governments manage to eavesdrop on terrorist and criminal communications? http://en.wikipedia.org/wiki/Computer_surveillance
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796 views

How to identify call stats about 2/3/4G users in a room?

If someone can please provide some advice about the following problem I am trying to solve it will be great. Scenario: A standard office room, with (say) a couple of people in it What I want to find: ...
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1answer
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Should we block all plaintext authentication and require authentication over an encrypted channel?

Should we configure our servers to require the authentication happen over an encrypted channel and block all methods of unencrypted, plaintext authentication over? I recently configured my servers to ...
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81 views

Capturing text messages on the fly

Suppose your phone is not connected to any network. You are sitting in a cafeteria with 50 other people, everyone is communicating to each other via text messages. Is it possible through any device or ...
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Is loopback interface protected from sniffing?

I'm trying to understand what are the risks derived from unprotected communications within the same device, by the use of the loopback interface. I've verified it is possible to capture packets, with ...
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promiscuous vs monitor mode in 802.11

I've been reading up on promiscuous mode and monitor mode as they relate to 802.11 networks. I understand the difference, which is explained here: What is the difference between Promiscuous and ...
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How to know what others browse through the network?

My friend connected to WIFI and after 5 minutes he told me which sites I had actually been browsing, and who I chat with. My question is: how do I defend myself against this, and also how did he do ...
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555 views

how to find out if a program sends data to internet (without permission)?

We have an application to save our customers data (some kind of CRM). This application has been written in Delphi and is a client/server application. This program apparently is sending out ...
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676 views

Protect an application that uses internet from packet sniffing

I developed a stand alone application such a way that, application use a remote service (using SOAP/REST) which available WWW. I am using HTTPS though out the application calls. It was perfectly ...
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271 views

Defence against promiscuous detection techniques

As an attacker,how do I prevent people from finding out that my NIC is in promiscuous mode? For test like ARP and DNS how do I defeat the users detection mechanism?
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221 views

Promiscuous mode and packet sniffing

Is it must for a packet sniffer to enable promiscuous mode?Can packets be sniffed without the NIC being in promiscuous mode? Also when in promiscuous mode the NIC accepts all packets which are not ...
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Can an attacker sniff physical network traffic through WiFi?

So, I am wondering - is it possible for an attacker to sniff traffic on an Ethernet connection if they are not physically plugged into the modem/router hardware but they are connected through wifi? In ...
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wireshark does't show HTTP requests from other devices

My machine along with several other machines are connected to wireless router. When i open some http page on same machine(M1) where wireshark is installed, it captures the packets such as HTTP GET or ...
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Sniffing From Squid SSL

I created a Squid proxy and a self-signed SSL certificate. The SSL certificate on the server is a private certificate linked to the ssl-bump feature. I am using tshark to dump the SSL traffic, but I ...
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907 views

Reassemble sniffed packets [closed]

I am attempting to analyse my WiFi network with on Mac OS X, is there a tool to reassemble TCP stream from Wireshark capture. I would like to see the entire HTML pages that are passing through the ...
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256 views

How to capture WhatsApp API requests using Fiddler?

I am trying to capture WhatsApp network requests and not able to do it using Fiddler. This is what I did: Installed Fiddler. Exported Root certificate and installed on my Android device. I modified ...
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176 views

Sniff LAN SSL requests

When I log in into Facebook, using Wireshark in the same machine, I can read the request data in plain-text. That doesn't happen when I'm sniffing my LAN: I can read the SSL packets but they are ...
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158 views

Suspicious SMS getting received on selected browsing

I am receiving several suspicious SMS messages with links telling me that I have requested subscription to their services (which I have not) asking me to confirm subscription. These SMS appear only ...
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How can I decrypt traffic on a WEP encrypted network?

Let's say that I am connected to a WEP Access Point and I want to sniff all wireless traffic inside that network. How can I decrypt the traffic even though I don't have the cryptographic key? I found ...
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How can the connection of a rogue VPN router be countermeasured with a sniffer?

As an IT admin, what can I do to countermeasure an attack performed like this page explains? http://www.pivpn.net/2015/08/hide-your-ass-hide-by-mac-address-and.html What they do is to put a raspberry ...
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Risks of using HTTP

What are the risks of using HTTP instead of HTTPS assuming that there isn't any rogue hacker sitting on my personal WIFI network waiting to sniff my traffic? Can a hacker sit in his boat in the ...
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327 views

DNS packets during ARP poisoning

I carried out an arp poisoning attack from my virtual machine to real machine with cain and able and collected data with wireshark from real machine. While I was investigating data with wireshark I ...
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How to sniff email with https on Windows? [closed]

I am working now on Windows 7 and I want to see if I can sniff an email content on it with Wireshark. So all right with http but with https I can't at this moment and I don't understand how. You ...
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1answer
305 views

Understanding Hearthbleed attacks [duplicate]

In order for a Heartbleed attack to happen and for someone to grab the SSL private key and even spy they have to be on the local network with a router, switch or server, correct? Or can this be done ...
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1answer
582 views

Is there any FOSS passive vulnerability scanner ? Not a NIDS but a vulnerability assessment tool [closed]

I've see the PVS (passive vulnerability scanner) from Tenable Network Security. I'm really interested in this kind of approach. Anyone know if is there any FOSS solution to be used professionally ...
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How do I sniff Z-Wave packets with a Zulu Transceiver [closed]

I'm trying to sniff the communication between Z-Wave devices. I have set up a "smart home" consisting of a few devices using Z-Wave technology, which use the frequency 868 MHz. I have been told that ...
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3answers
181 views

Are my credentials unsafe if I am already logged-in before connecting to a public network?

Let's say I am already logged-in to my Gmail or Yahoo account using my 3G then I switched to a public WIFI in an airport or cafe. Is my username and password still vulnerable? What others kinds of ...
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Why can't someone break email or https encryption by somehow getting access to the encryption key?

To repeat, "Why can't someone break email or https encryption by somehow getting access to the encryption key?" In other words, why can't someone intercept the key, or the algorithm to create the ...
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How can I monitor traffic of devices on my WiFi? [closed]

I have my kids cell phones attached to my router. What can I install to view what they are browsing and the media they have? I want to make sure my kids are safe
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512 views

How can I see the websites visited by clients of my WLAN?

How can I view the websites that are visited by the user of my wifi? What tools are required to do this? And one more question: can I see the WhatsApp communications?
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Is my company VPN the same as third-party VPN providers?

I'm just a bit confused with VPN. My company has VPN when I work remotely. So, I can access internal websites. However, does it mean if I browse my Internet over my company VPN, it will be as secured ...