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27
votes
4answers
4k views

What layer is TLS?

TLS stands for "transport layer security". And the list of IP protocol numbers includes "TLSP" as "Transport Layer Security Protocol". These two things would leave me to believe that TLS is a ...
23
votes
1answer
1k views

Does TCP/IP protocol offer a reliable way of determining who the actual sender was?

So I'm just poking around the TCP/IP protocol using a Ruby library called PacketFu, and it seems to me that in each packet, it is possible to set all of the following Source IP Destination IP Source ...
12
votes
4answers
2k views

How was (is?) the ping of death attack possible with IPv4?

While reading about Internet Protocol, I found myself reading about ping of death attacks: the thing that attracted my curiosity was the fact that these attacks could ever work! I mean, why wasn't ...
12
votes
5answers
18k views

Can Skype chat be protected from snooping? Are there safe alternatives?

I use Skype a lot. With all of my clients, staff, contractors and friends, however, the acquisition by Microsoft worries me, as two of my clients are direct MS competitors, and I often work on long ...
8
votes
1answer
159 views

Can ICMP Redirects still be used to redirect traffic in a LAN?

I tried just tried to migrate a MITM attack using hping3 with ICMP Redirects in my testlab. hping3 -I eth0 -C 5 -K 1 -a 192.168.2.1 --icmp-ipdst 192.168.2.15 --icmp-gw 192.168.2.100 --icmp-ipsrc ...
8
votes
1answer
382 views

Is Bluetooth 4.0 traffic encrypted by default/design?

I wonder if the BLE (v4.0) traffic is encrypted by default or by design, or is it just optional? If the former, is the traffic encrypted using a key derived just from the pairing pin or is there some ...
7
votes
3answers
2k views

Windows: unknown program/service etc. sends HTTP request to download a file; how can I find the origin of that request?

The firewall of my company has detected and blocked a repetitive (every 15 min) HTTP request from a PC, which tries to start a download of a file called ..._chrome_installer.exe(or so) from the host: ...
7
votes
1answer
1k views

Reconstructing bittorrent data from PCAP

I am doing a CTF flag for my school project with a PCAP flag based on this CTF write-up: eindbazen.net - Plaid CTF 2012 - Torrent I setup a local torrent file containing an .mp3 (the audio is my ...
4
votes
2answers
4k views

What's the difference between an application-level and circuit-level gateway?

From Wikipedia, I understand that circuit level gateways look at TCP handshakes to filter illegitimate traffic and that application level gateways somehow filter application specific traffic. But I ...
4
votes
2answers
40 views

Sandbox/Capture Outbound Traffic

Does anyone know of a program/system that is purpose built to allow you to sandbox/contain an outbound connection from a windows PC? (The aim being that you can analyse the data being sent via the ...
4
votes
2answers
152 views

Malware / vulnerability that uses or causes malformed IP or TCP Headers

I'm curious if there are any examples of malformed IP or TCP headers (for example, checksums that don't match, reserved bits that aren't zero, or poor header length numbers) used by malware, or that ...
3
votes
2answers
706 views

Packet Checksums

I recently learned that every packet includes checksum bytes and that the computer will request the packet again if the checksums don't match. How do the following attacks defeat such a safeguard? ...
3
votes
3answers
4k views

How to capture wireless data from an intruder using a home router

After my house mate experienced consistent ping spikes whilst gaming, he asked me to check/set the wireless router password. I did and I found two intruders from obviously nearby. How can the data ...
3
votes
1answer
270 views

RSnake's Slow Loris tool

I was looking at RSnakes implementation of his Slow Loris done on perl which can be seen here. I set up a little server to listen to his packets, and at first found this GET / HTTP/1.1\r\nHost: ...
2
votes
1answer
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 ...
2
votes
1answer
448 views

isaac random number generator and the type of encryption it is used for (game packet encryption)?

I recently found isaac but I'm not sure what type of encryption is possible using it. Does the random number generator itself become the message somehow or does it get used as a seed for an encryption ...
2
votes
1answer
118 views

Capturing (1x Only) HTTP POST Request [tcpdump]

Every now and then; I like to fire up tcpdump and just watch the network traffic as the packets flow on by. For example: user@host:~$ sudo tcpdump -Aevvv Will parse & print all local ...
2
votes
2answers
36 views

Profile applications from traffic analysis

I'm investigating options for segmenting a less secure business unit behind a Cisco 5505. I want to take this action quietly and transparently for political reasons. I want to know if it is possible ...
2
votes
1answer
891 views

Failure to capture any packets on wlan0 in monitor mode

I have read a lot of Q&As that have achieved success in packet captures of Wifi probe requests, which entails capturing IEEE802_11_RADIO (802.11 plus radiotap header) in monitor mode. But I find ...
2
votes
2answers
94 views

Could anyone technically see my requests with TOR if the person has access to my router?

I was wondering if someone could sniff the packets I send via my computer with something like Wireshark I guess even if I use TOR and the person could access the router like stated.
2
votes
1answer
908 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 ...
2
votes
1answer
81 views

Why are packets constantly being sent to international ISPs?

When using a packet sniffer, I notice a lot of packets being sent to a bunch of ISPs (such as axion.ca, wanadoo.fr/orange?, bresnan.net, zebra.lt) usually all at the same time. Here's a screenshot of ...
2
votes
1answer
306 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 ...
2
votes
1answer
878 views

snort ignores packets with matching src/dest IP address

This is my rule: alert udp 192.168.1.1 4000 -> 192.168.1.1 7000 (msg:"This rule doesn't work"; sid:1234567;) I am running snort against a precaptured packet file where there are UDP packets that ...
1
vote
3answers
152 views

Deep Packet Inspection SSL : How DPI appliances prevent certificates warnings?

How Deep packet inspection (DPI) tools prevent from certificates warnings through decrypt and re encrypting packets ?
1
vote
3answers
265 views

Is there a way to get information out of the router [closed]

Is there any way (directly from a computer or device) to see the packets that pass the router from the different devices. Thanks.
1
vote
2answers
262 views

Send fake response(?packets) to a program [closed]

So my idea was.. There is a program that require login to be able to use(the program should work offline aswell not requiring any online data), so i want to make that program to be able to run offline ...
1
vote
3answers
4k views

How to encrypt packets in network?

I have a simple wireless router to share the internet with single access username/password. I was wondering if it is possible somehow to set packet encryption so that other people on the LAN cannot ...
1
vote
2answers
92 views

Is it secure to split information into multiple packets?

I just stumbled upon this SO question. I was wondering if it would be still secure to split the encrypted packet into multiple packets, which are then transferred over the wire separately. Could ...
1
vote
4answers
1k 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?
1
vote
1answer
56 views

TLS 1.2 mutual authentication certificate based standard

I'm running an analysis on a TLS1.2 mutual authentication certificate-based client-server implementation and I'm wondering if there's a RFC or a reference document covering the handshake process when ...
1
vote
2answers
314 views

Limit Packets Per Second

Since last week I have been seeing something fishy and it seems to be worsening. I tried many firewalls and they seem to be useless. I blocked all unwanted ports and only few ports are open so I found ...
1
vote
1answer
46 views

Scapy WPA2 packet forging

Can I use scapy to forge custom packets on WPA2 network? Can I even pack the IEEE 802.11 headers?
1
vote
2answers
44 views

Several processes are listening to the same interface: any problem?

I wonder if some processes may get less packets than others if they are all listening to the same wireless interface. I'm running for example the basic mitm schema using arpspoof, sniffing packets ...
1
vote
1answer
20 views

How can I put in relation http timestamp with country time zone of the IP?

I have a series of packets within a PCAP files, among them I'm getting packet with HTTP protocol. starting from IP address I get the timestamp in GMT format and the time zone, for example: Source ...
1
vote
2answers
1k 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 ...
1
vote
1answer
442 views

Configure Wireshark to capture preformatted data from pseudo-device

So, for a research project, I'm trying to use the HONE project on github, which creates during its module installation two pseudo-devices in the /dev folder. These are called hone and honet, the ...
1
vote
1answer
1k views

Snort, add TCP retransmission rule

Can somebody help me with adding rule for packet retransmission. I found some documentation about the snort rules, but I am confused how to use it. The rules which catches the packet retransmission ...
1
vote
0answers
14 views

Probabilistic packet marking content ID field

For Above image: All routers are using PPM. What will be the content ID field if 1) R1 = mark packet, R2= Mark packet, R3 = Not mark the packet. 2) R1 = Not mark packet, R2= Mark packet, R3 = Not ...
1
vote
0answers
208 views

Perform SSL MITM -> Decrypt packet -> Modify packet -> Encrypt packet -> Send it [closed]

I have a victim and a server. My goal is to intercept traffic, perform SSL MITM, decrypt packet, modify it, encrypt and send it further. Everything has to be on-the-fly and protocol agnostic. For now ...
1
vote
0answers
177 views

Snort rule for outgoing attacks [closed]

I have a pcap file captured from a user PC. I need to analyze whether it has initialized a DOS attack to any server. alert tcp any any -> any 8080 (msg:"DOS flood denial of service attempt"; ...
1
vote
2answers
313 views

Force connected devices to use http rather than https

I am very new to MITM attacks and have been faffing around on my home network today.. When sniffing my iPhone trying to connect to some mail accounts I have noticed that it shows a message stating ...
1
vote
2answers
1k views

How to remove tcp header of packets captured with dumpcap?

The traffic from Wireshark saved into a file with dumpcap. In this file a have for example : € X `þ $À6 @ íëÃNxXÀ¨£ P&E»kKí¨<`PEà; HTTP/1.1 200 OK Cache-Control: private And I ...
1
vote
0answers
334 views

Suggestions on how to capture network connections/traffic for determining browser/SSL versions?

I've started thinking about how to approach analyzing my network traffic for information relating to SSL and browser usage for my web server farm. I also suspect there are some shadow (legacy, ...
1
vote
2answers
63 views

How eavesdropping attack takes place in network

I am learning some concepts of network security and I have the following question: One case of eavesdropping attack is that an adversary somehow places himself inside a network to order to capture ...
1
vote
1answer
67 views

Padding of 802.11 packet with 0's in libpcap [closed]

I am trying to send probe request to Access Points.But whenever I send a probe request packet it is padded with 0's i.e I see two packets on wireshark for every packet I send : a non-padded packet and ...
0
votes
2answers
294 views

Wireshark displays sql calls - Prevention

So I was analysing a new application that is being written. I noticed that on the app server level there are sql calls that are being made from C# code. These calls can be seen in wireshark by ...
0
votes
4answers
858 views

If you connect through a website via a proxy, and the proxy doesn't save information, can you still be linked back?

Say I connect to a specific proxy that I know will not keep information/data about who connected to it, and I go to a website and do something deliberately illegal. If the "middle-server" doesn't have ...
0
votes
1answer
1k views

How to run a snort rule over pcap file

I have a pcap file, and what I wanted to know is how can I apply the Snortrule below which I've already written within the rules folder in my log folder: alert icmp any any -> any any (msg:"TCP ...
0
votes
2answers
250 views

Solution for traffic capturing from router

i'm a newbie and i'm having a problem that i can't find it by google. I'm researching abbout DDoS detecting method now. As we can see that nowadays people often analyze networking traffic from router ...