530 Topics
Any help with the question or how to approach this would be fantastic The following is a dump of a TCP header in hexadecimal format: 00CD0018 00000EF1 00000D5D 502200D1 01BF0010 Please answer the following two parts of questions: 2.1 What is the source port number? 2.2 What is the destination …
hi guys, as part of my online game I need the server to always wait for variables that will come. I am using the "Socket s = myListener.Accpet...blabla.." the problem is that when I call Server.cs class the application freeze, 'cause its waiting for variables... I want it to listen …
I am trying to establish TCP/IP communication between DSP(that runs Code Composer Studio, an IDE to compile and run C code) and Host PC(that runs VC++ application). While i am sending the data from CCS to VC++, "Retransmission timeout" occurs, and at another instance "Persist timeout" occurs which stops the …
I have created a server application, which listens on port 6000 and responds on port 6001. Therefore the client sends data on 6000, and receives on 6001. Presumably for the server, port 6000 would need to be opened. Should I distribute client software to end-users, would they need to port …
Hi. I made a program for tcp chat but I'm really confused with which IP to use. I can send a message to myself by sending a message to a local IP such as 127.0.0.1 or 192.168.1.100. When I tried with my external IP (the one from whatsmyip.com) I get …
I'm having a problem when declaring a TCPListener in C# 2010 Express, and it is causing me a little hassle. It gives me this error when I declare one and I am not quite sure why? [QUOTE]The type or namespace name 'TCPListener' could not be found (are you missing a …
A most basic TCT connection is established with the code below: [CODE]// Initialization IPEndPoint m_IpEndPoint = new IPEndPoint(IPAddress.Parse("127.0.0.71"), 5000); Socket m_Socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); NetworkStream m_Stream = new NetworkStream(m_Socket); // Read/write operations m_Stream.Write(System.Text.Encoding.ASCII.GetBytes("Hello world!"), 0, 12); byte[] read_buffer = new byte[4096]; m_Stream.Read(read_buffer, 0, 4096); // Closing open resources …
There is a good tool for pcap base protocol testing. You can modify the pcap by using this tool. [URL="http://www.packetsquare.com"]http://www.packetsquare.com[/URL] packetsquare is a open-source packet modification tool. It is used for protocol testing and hacking. This tool is capable to parse and modify Ethernet II, VLAN(802.1Q), MPLS, ARP, IPv4, ICMP, …
Hello everybody! I have a game server (WoW). I want my players to download my custom patches to the game. I've done a program that checks for update/downloading things. I want my program to send a packet to my game server if player have all my patches. I dont need …
Hi.. i'm using a winsock control to transfer files between two computers which are in the same network..(LAN) and it works fine. Is there a way to transfer a file to another computer that it is not in my network? For example from my computer to a friend's computer.. Any …
Hello all, i have a small problem with my application and i am stuck now.... i have data coming on a particular port and i need to trasnsfer that particular data that i received to another port on a different machine... The data that i receive is over udp and …
Hi I've been give a task to create a text based game (multi user dungeon) in python but am unsure where to start. All I know is I have to use tcp and udp or something like that. I am very unfamiliar with this so I hope someone can help …
Hi, i intend to offer some SMS (SMPP) service from my Win 2003 server to my clients (over the Internet), which i need to redirect to the actual SMPP server (also via the Internet). The traffic will be 2-way. My clients will be connecting to my server instead of directly …
I have created a icmp ping function but it doesn't always work due to the firewall of the computer I am trying to ping. I heard you can get around this using a tcp ping. How can i construct a tcp ping packet. I did a little research and it …
The most accurate, highest performance protection against DDoS attacks. Built-in Intrusion Prevention System. Protection against SYN, TCP Flooding and other types of DDoS attacks. Real-time visibility of attack packets. TCP flow control. (Maximum connections restriction per IP)Attack packets filtering; UDP/ICMP/IGMP packets rate management. IP blacklist and whitelist. Disable/Enable proxy access …
Hello, I've written a basic class to help check on the status of various services, to be used in hopefully an extensible and easily modified manner.. I'm just a ruby/scripting/coding newbie, using tutorials online to learn from and working it all out as I go. I was hoping to get …
1 Win 7 unit , 1 XP unit connect via a workgruop LAN. All works fine then the Windows 7 losses access with the XP unit. (XP unit still see's Win7 unit). Win7 unit can still access the XP unit via a remote control program i.e. It can access the …
Hello Everyone, I am developing a kernel module which acts as a sniffer and also a module which edits the TCP packet window size as per requirement of the admin. And in the process I developed this kernel module which is tainting my kernel (Opensuse11.2).The sniffing module developed by me …
Hi, I've got two programs (client and server) using sockets. The program are working fine if I set the client IP to local host (127.0.0.1) or the LAN IP (192.168.0.3), but can't connect if the IP is set to external Internet IP (92.24.xxx.xxx). Anyone have an ideea, please? Thanks!
Hello, I have been getting Internet TCP/IP Protocol error. I have to restart the PC to get it to work again. What would be causing this to happen? Thanks a lot for your help Ernie
hey guys, I have a 2-3 pc home network all running xp, I'm using an old dynalink router which is connected to a switch(cheap no brains switch) and my pc's run from there. Is there a command line command that allows each pc to get an ip/mac address from each …
Hey guys, I came here to ask for some help on making a DoS(Denial of Service) program, Not MS-DOS :p. My problem is I don't know what i would use to make it function. I don't know and can't find the functions I would use to make it. I was …
A user reported not be able to access the network. I moved their network cable to another jack and all was well. The 2 wall jacks in question were professional installed Cat 5E cabling, both are plugged into a switch but I can't ping or tracert anything on the network …
Hi, I made a game and i would like to have a client server, ive been able to use TcpListener with internal ip such 127.0.0.1 or 192.168.1.100. But when it comes to make it work through internet (external ip) it does not work. Anybody would know why? Thanks for your …
I have tried to measure packet loss on a data link with the Ipred tool through an SSH tunnel and it does not work. I can use TCP on the same SSH tunnel but then it's not possible to measure packet loss.
Hi, I am struggling to read ( Hex )bytes from TCP port and write to a file. If someone can help me, I will aprreciate. Thanks,
when i w.c to see the adapter detail.ip address,Dns and all about. but nothing is Comming.after some Time Information is Comming. and internet is very slow.kindly let me know the idea.why internet is slow.Kindly find the attachment also.
This problem began recently. It says I am connected to a wireless connection, but every website I try to access, it says: "Internet Explorer cannot display the webpage." Firefox says: "Server not found." My roomate uses the same wireless connection and his works fine. I cannot ping any websites. I …
Hello Frnds... Can anyone say how to send a message to a Mobile application via tcp ip.My mobile must work as both server and client model.both sending and receiving process should be done in mobile and also in my desktop application. Ie. pass a message form mobile and retrive message …
Hi there, I am running a ColdFusion server on a VPS to HostMySite.com and lately we are having strange problems with it. Every few minutes the server is not responding even if we restart the services - IIS and ColdFusion - and even the whole system. HMS guys investigated the …
hello everyone, am a third year university IT student. I am preparing for my final year project. I have basic knowlegde of java and am confident of my tcp/ip, i need a project idea(s) using these two and how to go about it if possible. I need help from the …
Hello Everyone, I am Holli Lee I live in GA with my husband and 3 kids. I am currently working as a 911 dispatcher for Clayton County Police Dept. I am taking a Networking class at Devry online. I wish I would have taken this class at the school because …
I'm implementing a TCP protocol. TCP implementation requires to send packets continuously and if the receiver doesnt respond after a particular interval of time it should resend the packet again. I need some method to implement a timer expiry function. How can I implement it?? Should i implement threads (If …
Hi, I am new to c# and was wondering how i would create a server (windows service) that would connect to multiple clients at the same time using TCPIP. Would i need threeding? I know how to create a service so its more on how to do the TCPIP bit …
Hello all I run out of credit for my zain sim which i use wiith a modem to surf. I realised I can still ping any url. the catch is i cannot actually browse these pages. is there anyway i can still connect to the internet. what does the ping …
Hello, I have to take a snapshot of my screen and send the image to a client using Datagrams. I think my problem is at the client part. The image is null, and I don't know why. Here is the server part. I tried to send 534 byte packets (bigger …
Hello, I built a chat application that uses sockets and TCP/IP protocol. The client is an applet. The problem is I cannot connect the applet client with the desktop server application. [I]If I run the applet inside the applet viewer in NetBeans it works perfectly[/I]. I even tried the applet …
Hello guys, I have a TCP Listener Server which listens to requests and replies them. It is working fine in a particular network. But what if i would need to make it available for everyone (my clients) over internet to connect to it and send receive messages/data? My current code …
Hi all, How to do socket programming in C.I need to control an external device through TCP/IP or UDP/IP so that when I send a query the device should be capable to respond.
Hi all, Im new here - so please bear with me ;) Im pretty new to C++, although I have previous experience in C. I created a small socket app that allowed a client to connect via telnet and send some data for it to be assessed. I have recently …
I have a port server that converts an 19.2kbps rs-232 data stream to tcp/ip then to my computer wirelessly using Motorola Canopy system. When my tcp/ip server software connects to the end device (the serial device), the available bandwidth is reduced drastically. Here is a screen shot of the bandwidth …
Hello all. I'm feeling pretty confused about how UDP port forwarding is done. My situation is: I have [B]Comp1[/B] with a local IP (192.168.0.2) connected to [B]Comp2[/B] with external IP and internet connection, and some unknown Internet Client ([B]IC[/B]) (three of them actually), who needs to send data to the …
Hi all, Wonder what happen is that..... When i try to connect to the internet, the blue screen automatically appear! Before this during using LAN had appear, after that i bought a network card to replace for try but.... It doesn't works too....... Even that i had change the brand …
Hello every one ... I need help to make connection between two PC through socket programming ... in which scenario i want connection is as below ... there are two networks on different places.One network having internet connection of COM1company and through that one connection only other PCs are getting …
i need help on programming networking.. i'm creating a winservice called HeartBeat. this service is to check if the gateway(list of gateway) is alive and able to do certain process( other application) and if it's down after certain tries, it will notified related person(email/sms/voicemail). We a doing terminal application for …
Apologies if this is in the wrong section. I'm trying to create a batch file to run on a PC for setup purposes. It needs to set the IP and Computer and Workgroup. So far IP and Computer name work until a restart when the IP settings appear to drop …
I recently started messing with tcp socket programming. I hacked up a little instant messaging application that seems to work has some little problems but the world isn't in need of more IM clients. but I wanted to know a good practice for sending large files over tcp sockets. i …
hi people! this is my first post here. i had no clue as the where to post this question from the list of forums, and since i have Vista this was my only viable link... so sorry if its in the wrong place. i searched for this query, but as …
we have a intranet in office to share interent among all these computers i have installed one more lan card on my pc and connect a DSL modem on this for getting Internet and used proxy software to make it as a proxy sever on dhcp mode , one of …
Hi, I want to find my computer by giving the my fixed ip address over the internet. I tried but most of the solution find the client's ip address but i am not working like that. Can any one help me in this matter. Thank YOu. GM.
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