530 Topics
Hi! There is anyway to make the buffer size of a socket dynamic ? Because i need to download some things and my buffer of 1024 bytes cant get all the information. How could i do this ? Thanks
Hi, We know that UDP does not contain any acknowledgement mechanism. But the TFTP which uses UDP sends the ACK packet on reception of data packet. How is this justified? And if the TFTP is sending the ACK packets, the overhead is bound to happen so why not use TCP …
Hi, Recently, I've noticed on my home router (DLink DIR 635) a lot blocked connection attempts being logged to our Windows Vista machine - roughly one every 4-5 seconds. The destination port is always UDP 15126 but the source IP addresses come from a wide range of different sources - …
Hello I need to access a LAN computer via RDP, and need to know on which port that computer is listening. how can I proceed with this? Also is there a generic freeware which can allow me to scan all pcs on my LAN and get me a list of …
hi... i wanted to know if any of you could help me... i need to create an unidirectional link between two nodes using TCP on Network Simulator. For this, I suppose this means I need to setup a half-duplex on the tcl configuration, Ive read the entire NSnam manual and …
Every single time I turn on my laptop this message pops up: Generic Host Process for Win32 Services has encountered a problem and needs to close. We are sorry for the inconvenience. Technical Details: C:\DOCUME~1\user\LOCALS~1\Temp\WER590c.dir00\svchost.exe.mdmp C:\DOCUME~1\user\LOCALS~1\Temp\WER590c.dir00\appcompat.txt I have tried running AVG Anti-Virus Free Edition 2011, Spybot S&D, Malwarebytes'Anti-Malware and the …
Hello, I have to continously update an image based on screen capture. So how can I memorize only the part of the image that changes from one picture to another (from one frame to another)(pixels?)... Think of a remote desktop. It's not a good thing to send a 200K desktop …
Hi, I have following questions, 1. I want to know that what is the difference between tcp tunneling and regular tcp client server chat program. 2. If I live in Sri Lanka, and I want to connect and pass data to a pc with a dynamic ip (a standalone one, …
I work for a small ISP, and recently we've been hit with 3 different customers telling us that when they try to browse the internet with IE on Vista Home that it won't display certain or all pages. They have Vista diagnose connection problems and it comes back telling them …
Hello everyone. Sorry in advance if my question seems noobish. I'd like to know if it's possible to change my router such that it uses another, dynamically assigned IP address to be accessed as opposed to my current. Let's assume my WAN IP address is A.B.C.D and I turn my …
Hello For the past few days am having an unexplained problem with my network connection when I connect on another pc on my lan to copy files from there to my pc. Once I click paste on my pc, my network's sent packets gets accelerated to such an extent that …
I found a code on several websites for a UDP client and server ... when I run the code of both the client and the server on one computer, it works normally ... but one I work on two computers (one server and the other client), the sever becomes 'Not …
I have a few questions here that I really don't know how to approach, any thought would be appreciate it: -Under what conditions would a computer construct a frame with a destination Ethernet (or MAC) address of the destination computer it wants to communicate with? What would be the destination …
Its been a few years since i've coded any network applications so I was hoping for some suggestions on the best approach. I have written two programs which i now need to have them communicate with one another. They are both running on a LAN (over VPN) with static IP …
I'm writing a program that parses tcpdump output files. I have a tab delimited text file that contains MAC addresses and hostnames. How can I have the program search this file for a MAC address and then return the corresponding hostname? Any help would be appreciated. Thanks.
I'm writing a program that will parse and print packet information from a tcpdump file. One of the fields is the timestamp, which is in seconds. The program is reading the timestamp into an unsigned int type. I need to be able to convert the timestamp in seconds to a …
Hi, My webserver code is trying to send an image file over a TCP connection. However, the send() function is returning a -1 value with the error: Connection Reset by peer. I am using a web-browser to access the server so my guess is that the server is somehow sending …
Good morning. I read and followed the instructions posted on this site. I ran the Microsoft Malicious software removal tool and it identified the Alureon.h virus. I could not fully delete the virus as I was unable to access the Internet and get the rest of the manual steps to …
I am trying to send a udp query, the query works and I recieve -some- data back. However the string I recieve back is not complete, its cut short. If I send the same UDP query using netcat I get the full response. Must I increase the size of the …
Hi, I am writing code for a webserver and am trying to send a html file called index.html over a TCP socket. How would I do this? At the moment I am trying to read the contents of the file and then send them over the connection. However, the page …
I am working on a certain project ,and I want to send data from a windows application on a computer to another windows application on another computer , knowing that both computers could be anywhere (not together in a LAN network) ... I heard that it is possible through a …
When you're instructed to renew the TCP/IP and Winsock my question is: Will "netsh winsock reset" the command that will cover the entire ball of wax? Or, is there more to it. I'm a bit confused at this stage. Input greatly appreciated. Thanks, Giddyup
Hello For example if i want to implement my own protocol, i can proceed by implementing the extra features on UDP on the application it self and thus achieving my task. But what if i want to implement it on the OS level just like TCP or any other protocol, …
Hi all, Win xp pro sp3, ie8. Firefox connects and is functional, internet explorer will not connect. Malwarebytes connects and updates no errors found in safe mode scan. Mcafee update fails with connection error and windows update will not connect. Below are associated logs, any help is greatly appreciated. Thanks …
I can access any site except att.yahoo.net or [url]www.att.net[/url]. I have Verizon DSL. AT&T claims it is my firewall/DSL provider blocking my access. I installed nothing new on my PC and all of a sudden I can't get to those two sites. I ran a trace route from my router …
Hello For example if i want to implement my own protocol, i can proceed by implementing the extra features on UDP on the application it self and thus achieving my task. But what if i want to implement it on the OS level just like TCP or any other protocol, …
Hi! I have an application that will operate with a distributed database on various pcs in multiple cities... the application is in c# connected to an sql server...I need the pcs to connect between themselves, how should they do this? it's the first time I work with this type of …
Hello, i've a server and client code in which the error i'm getting is: on deserialization- but when i checked the byte[] length after serialization that i send they are 1550, and then over the tcpclient when i received the byte[] it was 1448 in length... any help or suggestion …
Hi all, I need to connect through ftp on some server to do some changes but I think that they use some rules to avoid connection from other foreigner countries (is it possible in your opinion). Basically I receive the 510 error with login and password incorrect but if my …
hi guys, can anyone help on what this cisco command means: ip route 0.0.0.0 0.0.0.0 200.1.1.2 and ip route 192.168.1.16 255.255.255.0 10.1.1.2 thanks :)
Hey everyone, I am developing code to accept TCP communcations from one computer to another. Basically from this forum, all I need is the ability to send a data string to the other computer. here is the code I have to do so. they both are the same application, but …
Hello, This has been a continual problem that I have had for a while now. Sometimes there is no problem at all, sometimes there is. I have searched the net a lot to try and find any similar problems- but haven't found any. [B]Info[/B] I am using Vista Home Basic. …
This is the form.cs in my REMOTE SERVER [CODE=c#] using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Runtime.Remoting; using System.Runtime.Remoting.Channels; using System.Runtime.Remoting.Channels.Tcp; using Microsoft.Win32; namespace remoteserver { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, …
Hello everyone. Working with winsock, I have successfully been able to connect a client application to a server application that is running on the SAME computer. My problem is, I cannot, for the life of me, get a client application to "connect" to a server application that is running on …
I need to get the info available devices in my LAN network. My logic is as follows: 1.Send a UDP packet/s to the IP 255.255.255.255 and wait for the response from the available devices, once the devices repond back need to analyze the response.. Please help me out in implementing …
Hi I have the following: Location 1: Ip range 192.168.0.0/24 default gateway 192.168.0.40 Location 2: Ip range 192.168.1.0/24 default gateway 192.168.1.41 Location 1 and Location 2 connected and works great. I have a server on Location 1. 2 Network Interface Cards Interface 1 : ip 192.168.0.241/24 default gateway 192.168.0.40 Interface …
I'm working on a code that enables the user to input a string , compare it to some text in a file then send the approriate data ( from another file) using serial communication or TCP/IP. I ahve implemented the serial communication part but the TCP/IP..I've looked around but have …
Hi, As there is almost no documentation for this, I would like to know hot to properly use in VB NET 2008 the keep alive socket option. Tried this: [CODE]myTcpClient.Client.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.KeepAlive, 1)[/CODE] but then the TCP does not connect any more, and how do I know when the connection brakes …
hello, i m using window server 2003 enterprises edition.i m using two network card one is connected by internet modem.and other is for local network.we r using two network on our network like192.168.-.- & 172.16.-.- ..ALL 192.168.-.- series users are access internet but the other series cant access internet.how i …
Please pardon my lack of networking knowledge. I am trying to figure out how to setup routing tables to connect to machines that are on a subnet on a different network. My current machine is sitting on a network, we'll call it Net1: My IP is 10.44.76.X (subnet 255.255.254.0 - …
I'm trying to connect to devices on a network through TCP , one is a wireless device with limited capabilities (a 802.11g transceiver with an incorporated SoC ) or the client and the other is a normal pc , the server . As the client is meant to be in …
Hello. I am trying to implement a transport layer protocol for my project. I am going to use Linux as my operating system. Could you please suggest me some books or links that explain the implementation of transport layer (like TCP)? Thank you.. Thanks, Bala
I am being tasked to record TCP data and play them back with same speed. I am able to record tcp data but struglling to playback with same speed. If someone can help will be greatly appreciated. My codes below are reading TCP data and writing them in minute files …
My above code is reading TCP data and writing them in minute file under recording directory as follows: /WSIGraphicRecord3/recordings_dir /WSIGraphicRecord3/recordings_dir/20100512133155.ws /WSIGraphicRecord3/recordings_dir/20100512133256.ws /WSIGraphicRecord3/recordings_dir/20100512133357.ws /WSIGraphicRecord3/recordings_dir/20100512133457.ws /WSIGraphicRecord3/recordings_dir/20100512133557.ws /WSIGraphicRecord3/recordings_dir/20100512133658.ws /WSIGraphicRecord3/recordings_dir/20100512133800.ws /WSIGraphicRecord3/recordings_dir/20100512133900.ws /WSIGraphicRecord3/recordings_dir/20100512134001.ws /WSIGraphicRecord3/recordings_dir/20100512134101.ws /WSIGraphicRecord3/recordings_dir/20100512134202.ws /WSIGraphicRecord3/recordings_dir/20100512134302.ws /WSIGraphicRecord3/recordings_dir/20100512134403.ws /WSIGraphicRecord3/recordings_dir/20100512134503.ws /WSIGraphicRecord3/recordings_dir/20100512134603.ws Now my question is how to playback these files with same speed? I am able to …
I recently got infected by a virus, somehow. I have determined all the files associated to this virus that launches multiple background iexplore instances, and deleted all of them However, the key dll file that's powering the virus is very resiliant. It made itself the MSAFD Tcpip [RAW/IP], MSAFD Tcpip …
Hi all, I am trying to build a ui application with thread for tcp server. I managed to build the tcp server itself using console (giving a welcome message when I telnet it), but when I copy the exact source code in WPF , I can not telnet it. The …
Hello people, i am really sorry to post two new threads in such a short time, but i have a problem that's driving me nuts. I think i know where my program fails, but i don't know the reason why. Let me explain: I am making a chat program. I …
I am trying to make an IP chat using TcpServer. As many people are behind a router, how would it be possible to connect to them directly? I know how to call up my external ip, and how to find out my internal one assigned by the router, but how …
i want to know full description of protocol working set up a connection and releasing process
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