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

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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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1answer
101 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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1answer
4k views

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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1answer
605 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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2answers
663 views

Electromagnetic induction attacks - reverse TEMPEST?

I know that electromagnetic emissions from a device can be used to extract information from a system, e.g. TEMPEST or Van Eck phreaking. I also know it's possible to induce a signal into a ...
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336 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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1answer
633 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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2answers
1k views

How to see whether the pcap contains RTP traffic?

I am analyzing the traffic of a VOIP application. I started up wireshark, and made sure no other application was using internet, and then had a a voice call on the application. Wireshark captured some ...
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1answer
148 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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4answers
538 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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394 views

Sniffing the sniffer

A sniffs B while B is sniffing C. What's the traffic in A? Does A catches both B and C traffic or only B's?
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15k views

Sniffing, Snooping, Spoofing

Could somebody please explain me the differences between the following attacks? sniffing snooping spoofing My professors used them all in his documents, but I'm not sure, if those are 3 ...
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2k views

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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3answers
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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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1answer
706 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
2k views

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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2answers
120 views

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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3answers
439 views

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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3answers
3k views

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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448 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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1answer
585 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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2answers
247 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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2k views

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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1answer
748 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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1answer
78 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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256 views

Security implications for two applications communicating with TCP/IP on localhost

Considering this for the local loopback connection: - It is implemented entirely within the operating system's networking software and passes no packets to any network interface controller. If ...
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1answer
4k views

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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1answer
279 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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2answers
935 views

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
292 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
515 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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37 views

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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172 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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479 views

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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11k views

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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4answers
277 views

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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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 ...
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955 views

Can Your ISP use a Packet Sniffer? [closed]

Can ISPs presumably use packet sniffing applications such as wireshark and monitor my unencrypted data? Are they "allowed" to do so?
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5k views

Facebook login on HTTP? [duplicate]

Possible Duplicate: Is the Facebook login form using SSL without https in the URL? If you access http://www.facebook.com/, in the top right side there is the login section. You can enter ...
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122 views

Spying on insulated cables (electromagnetic/induction field)

I hope this is the right forum to ask this question. If not, please tell me where to go. From my understanding most cables have an electromagnetic field around them when data passes through them and ...
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1answer
3k views

How does wireshark detects online-messenger traffic?

I have been working on how to find use of online messenger (e.g imo.im, ebuddy) using wireshark. I'm doing , as i need to build SIEM (security information event management) use-cases which detects ...
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3answers
355 views

Any one know about UDP traffic on source port 26221?

On my captured network traffic i observe a flow having a source udp port of 26221 and have different destination udp ports. Some of these destination ports were standards IANA ports. The average ...
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2answers
81 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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1answer
537 views

What's most standard way to secure internet connections and protect privacy?

It's common knowledge that Wi-Fi, or other Internet connections, should be encrypted via a VPN to be secure, and to hide our real IP address from intermediary network observers. However, one can't ...
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1answer
191 views

Will packet sniffing still work if all connections go through a local proxy?

Will packet sniffing work if all connections use a local proxy? You are forced to use this proxy to get a connection to the internet at all.
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82 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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372 views

Doesn't seem to be able to capture the packets I need [ANSWERED]

I've been trying to capture Telegram messaging application's packets (for my class project) but I couldn't get anything out of the punch of captured packets I got. Telegram does AES-256 encryption ...
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245 views

Etterfilter file-contents injection

On the etterfilter(8) man page, there is a section about the inject() function, which takes the contents of a file and injects it in a packet, or as its own packet when coupled with drop(): ...
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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 ...