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0
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0answers
11 views

100% packet loss tethering at&t Samsung phone with pda net

so I have a problem with 100% packet loss tethering my unlimited data plan with pda net to my computer, where I share my internet with my xbox as well, and have the same result through Xbox live. I ...
2
votes
0answers
170 views

What is the full process of a client downloading a torrent file?

I'm attempting to write a torrent client, and while the unofficial specification is quite helpful on a technical level, I would like an explanation of the process of downloading a torrent file (...
0
votes
1answer
21 views

How can I throttle incoming packets for a specific program in Windows 10?

I want to throttle incoming connections for GTAV.exe. My router doesn't support QoS so I'm looking for a way to limit the incoming packets through software. I have tried creating a QoS policy through ...
1
vote
1answer
72 views

Packets don't come back in a network with NAT in Cisco Packet Tracer

This is my network: I have done my best to try to solve the problem, but with no success. Whenever packets come from LAN 1 or LAN 3, the local IP addresses are translated into one of the 3 public ...
1
vote
1answer
22 views

netem packet loss for packets destined to the same machine

I am using a command like sudo tc qdisc add dev eno1 root netem loss 10% to delay all the outgoing packets over the interface eno1, but this won't work if the packets are destined for the same ...
0
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0answers
26 views

How to Make a Portable Internet USB Device with Wifi Capability to Send all the data first to some particular device and then to other clients?

I have a portable internet USB device which can also throw wifi signals. All type of clients are usually connected to this device through wifi including PCs and Android devices. Is there any way that ...
0
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0answers
14 views

How to detect packet with specific “Total Length” or “Header Length” using Snort?

I'm using Snort to tutorial purposes. As you may know, it brings different rules available for the user to detect different types of transmission packets. The question is that I don't find any ...
13
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5answers
18k views

How do IP answer packets reach their destination inside of a private LAN?

This is a little theory question that has been confusing me for a pretty long time. Basically, if we are inside of a private LAN, and we want incoming packets to reach, for example, an HTTP server ...
1
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0answers
37 views

How to prevent Continuous ACK packets to my server

I found my server got continuous ACK packets from different sites, never stop, like below(I used tcpdump to capture) the remote sites use https. contains akamai, amazon..etc, which should be legit. ...
3
votes
2answers
95 views

Using Fiddler 4 to intercept game packets?

I can capture packets sent from my browser, but open games fail to connect through the Fiddler proxy. I know that Fiddler is mainly configured for browser applications, but can I force other ...
0
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0answers
81 views

Duplicate packets with a bridged virtualbox

I have a virtualbox with 64-bit Ubuntu bridged with one of my interfaces on PC. The virtualbox VM has a router software Quagga and I'd like to have it as my OSPF router. However, the virtualbox VM ...
0
votes
1answer
130 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? I have access to the WPA2 passphrase so will there be something stopping me from doing it?
0
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1answer
113 views

Why are TCP Packets going from my pc to server owned by EdgeCast Networks, Inc.?

I am seeing a lot of entries like this in my Netgear DGN 1000 log for the last few weeks: Wed, 2015-11-04 20:36:56 - TCP Packet - Source:192.168.0.2,63272 Destination:68.232.44.114,80 - [BLOCK] ...
0
votes
1answer
40 views

Inter-network communications

I have an internet connection at my residence through my cable provider. Obviously it hooks into my cable modem which them hooks into my router where the signal is switched to the wireless access ...
0
votes
1answer
127 views

Packet Loss/High Ping with One Computer Seems to Affect Entire Network

I'm having an issue with my PC. I have a wireless router/modem combo box that was provided by my ISP and am having issues with a single PC on my network. The PC is connected via WIFI and often will ...
2
votes
2answers
326 views

How can I monitor packets sent between two devices on the LAN?

I'm trying to determine the cause of a communication problem between two devices on my wifi network. I CANNOT install programs on them to determine this. How can I monitor the traffic between these ...
1
vote
1answer
44 views

Does Windows 8.1 filter spoofed packets, or packets with bad checksums?

I recently started a software security class. I expect to be required to craft and send packets; yet I read somewhere my Windows 8.1 installation filters packets based on a valid checksum. Is this ...
-2
votes
1answer
128 views

ISP broadband user Authentication

How does an ISP authenticate a broadband user via its radius server or any other methods. Will it would be possible for me to locate this server eg- packet capture,by halfbridge mode, ip tracert? Is ...
0
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0answers
76 views

Reading packets with Wireshark

How do I read packets captured with Wireshark. I was finally able to capture incoming and outgoing data in hopes of developing something along the lines of an IDS. Thanks in advance for the help. A ...
0
votes
2answers
146 views

How are Internet connections differentiated from each other by an operating system?

Given this example, how would my operating system differentiate between each request. Let us say I have 3 tabs open, and at the same exact time, they all go to http://google.com. How would my ...
1
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0answers
105 views

Can we send and receive uTorrent packets through TOR?

I just started using pcapy python module to capture network packets. Is it possible to capture packets going out from uTorrent (on my own machine) with pcapy or scapy and sending them over the TOR ...
0
votes
1answer
3k views

Overlapping address error in Packet Tracer-Possible subnet error

I am working on my hands on final exam for Networking Fundamentals. I have accomplished everything except for putting the 4 devices on two separate subnets. These are my subnet calculations: Given ...
40
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2answers
16k views

How does Router know where to forward packet

If several computers with local addresses (192.168.0.#) are connected to a router and each computer opens a web browser and requests a page over HTTP, when these TCP:80 packets are sent out, the ...
0
votes
3answers
2k views

Network Sniffer identifying strange requests to *.crdui.com

So I just downloaded a Network Sniffer on my local machine, as I think something is going on. As soon as I opened it, selected my network adapter (an LTE stick), it started showing me requests from ...
2
votes
0answers
356 views

Modify incoming packets before forwarding in Linux

I’m using a Linux (Debian based) system on which IP forwarding is enabled (/proc/sys/net/ipv4/ip_forward is set to 1). I can read the incoming packets using a raw sockets program, but I want to modify ...
0
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0answers
3k views

Old Look@LAN software gives “No packet to read” log error; then won't ping

Yes, before anyone asks the question, I'm still using Look@LAN. It's the best free network discovery and resources program I've seen (but please, if you have suggestions for newer ones, let me know). ...
1
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2answers
2k views

TCP\IP Packet Signature - how to identify such data packets?

I know of a program that can "carve" (look for) TCP IP Packets from raw binary data. The results it presents are the source and destination MAC addresses, the source and destination IP addresses and a ...
0
votes
1answer
520 views

How to get packets for a specific access point

I have Wireshark and Aircrack-ng and whenever I capture packets I don't know how to capture packets for a specific network (the network is "2WIRE207"). I need to do this so I can use Aircrack-ng.
0
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0answers
63 views

What is the right procedure to check where my packet loss comes from?

I installed a new ADSL line and on my desktop I'm using a WIFI usb pen to receive the signal from my modem (Netgear DGN2200v4). I took some speed tests and ping tests and I noticed that I have an ...
-1
votes
1answer
93 views

Modify a packet's content on DD-WRT

I need to modify incoming data to my network. Specifically, I want to modify all responses from a specific internet site so it doesn't show a certain HTML element. Is this possible with DD-WRT/...
0
votes
1answer
106 views

calculate time taken to reach from network A to B without ping and telnet

I want to find distance between A and B either in terms of network time or Hops count.I have few ideas like I can ping B from A will log down time taken to respond that ping request . Also If I know ...
0
votes
1answer
311 views

Is it possible to sniff packets on other subnetworks?

I've been reading about packet sniffing and was wondering if it's possible for someone to sniff packets on subnetworks other than the one they're on. Since the point of a subnetwork is that devices ...
0
votes
1answer
434 views

cannot capture packets on wireshark without internet

I am using Wireshark on my Windows 8.1 Pro 32-bit pa and whenever I start Wireshark without internet, it can't capture ant packets. But when I am connected to the internet, it captures packets form ...
0
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1answer
152 views

Track down internet PCs communication using network media devices? [closed]

We are having a little argument here about whether there is a way for internet providers to trace your traffic using the network media devices they are using. Some of the folks say that if you are ...
0
votes
2answers
618 views

What does a network packet consists of?

I know basic networking but I am not very good at it. Now I am calculating how many packets will be lost if I use UDP over IPv4. I can assume that the protocol overhead for data sent via UDP over IPv4 ...
2
votes
5answers
2k views

Trying to understand IP packet flow

So I'm having trouble understanding how packets travel from one machine to another. Below I've put in an example of Computer 1 trying to connect to Computer 2. Computer 1 IP: 192.168.1.11 Subnet: ...
0
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1answer
227 views

OpenBSD: Prioritizing empty ACKs

There is a wildly used example concerning PF and prioritising empty ACK packets, so that an an asynchronous connections' downstream does not lose performance, if the upstream is clogged up. The ...
0
votes
1answer
773 views

Remote Packet Capture using Wireshark

Well The scenario is that I have a Windows machine(at home) and a Linux box running headless Ubuntu server(without GUI) on a remote location. I got Wireshark installed on my windows machine, and ...
2
votes
1answer
2k views

TCP vs UDP. Sending data on a closed port

I try to understand differences between TCP and UDP packet on the error-checking. I know that UDP packets are connectionless and doesn't care that the packet will arrive the destination safely. And ...
0
votes
1answer
752 views

Iptables mark incoming packet - vpn routing

I have connected my home to my workplace for out of house backup reasons through OpenVPN. The connection is working nicely. At work I have 5 fixed IP addresses. Now I would like to assign one of ...
0
votes
0answers
138 views

How to send packet on tor network to get back to my computer?

Can anyone tell me how to configure system (I think Linux is the best option for this) to be able to send packet by Tor Network back to my own computer? I have to conduct research on how it behaves (I ...
1
vote
1answer
379 views

Why HTTP response is split in 2 parts: header and body?

I'm trying to understand why a single HTTP response is split in 2 parts in the following setup: Requested resource is protected by HTTP Digest Authentication on server side. Communication is ...
2
votes
2answers
995 views

Why cocoa packet analyzer shows “capture packets to a trace file” menu?

I am trying to use 'cocoa packet analyzer'('C.P.A'). I uses mac OSX and I installed this from appstore. After installed this, when I launch this program a popup comes out. Others say that to get ...
8
votes
1answer
28k views

Capturing wireless traffic (using Wireshark)

When I run wireshark on a wired network it works fine and reports all of the packets. When I run it on a wireless network though I only see my own traffic. The wireless card I have is supposed to ...
0
votes
1answer
81 views

How to learn the current network scheduler used in my linux machine?

How can I learn what network scheduler for packet selection is used in my linux system? Thanks!
1
vote
1answer
5k views

What is most likely to cause this packet loss?

This question: Can a software cause a huge ping response is what made me realize that I have a network problem. As you can see here: C:\Users\*****>pathping google.com Tracing route to google....
7
votes
2answers
8k views

What does the MySQL “max_allowed_packet” setting actually control?

We've been cleaning up database problems for the last four hours, thanks to a broken mysqldump that wasn't sufficiently erroring out. We were getting these errors: mysqldump: Error 2020: Got packet ...
4
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1answer
6k views

How to enable “packet forwarding” in OS X

How is it possible to enable packet forwarding in Mac OS X? Google gives me tons of hints for Windows and Linux but not for OS X.
0
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1answer
1k views

See file size on wireshark when downloading

Is there a way to see the filesize of a file when starting a download through wireshark? I want to see the size of http downloads on wireshark when i start them but i cant find that information.
5
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11answers
23k views

What's the difference between a TCP segment and a TCP packet?

Is a TCP segment not part of a TCP packet? Here's what I've read: A segment is a piece of application data chopped into a transportable size by TCP and wrapped with a TCP header Isn't the TCP ...