Transmission Control Protocol (TCP) and Internet Protocol (IP) provide end-to-end connectivity specifying how data should be formatted, addressed, transmitted, routed and received at the destination.

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Windows keeps using a preferred DNS server?

I have trouble using Panera WiFi, and I finally tracked down the problem: Every time I reboot, Windows resets my TCP/IP settings for my wireless adapter to use a specific DNS server, instead of ...
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2answers
2k views

IP Routing / Forwarding

I have an older program that I use a lot and in order to work properly it has to connect to a time sever (199.211.133.139), for some reason, I am no longer to ping this time server and the program ...
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0answers
6k views

Simple way to open Port for Transmission for a Mac Snow Leopard

I am a complete noob when it comes to TCP/IP, but would like to open up my port for the Transmission bit torrent client on Snow Leopard Mac. Also, I am based in the UK if that has any relevance.
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1answer
253 views

My wifi only allow me to use http with proxy-auth, can I use other program which use other protocol?

My school offers students WiFi which only able to use browser or other program which use only http and support proxy-authentication with BASIC Auth. For other program such as windows live messenger, ...
0
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1answer
276 views

How configure OMRON (V750 RFID Reader) via browser-based interface?

I have a OMRON V750-series UHF RFID System. I'm trying to access it in a browser via IP address 192.168.1.200. However, I can not gain access to it. Do I need to change my TCP/IP config?
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2answers
7k views

What layer of the TCP/IP network does ARP belong to? [closed]

I'm working my way through the Sams teach yourself TCP/IP book and it say's that the Address Resolution Protocol belongs at the Internet layer. Is this true? Other sources claim it is a Network ...
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4answers
209 views

If people transfer a lot of data on the local network can Internet connection become slow?

At my work there are at least 40 people sharing the same internet connection link over the same switch that is used both to internet access and local traffic of large file. People here usually use ...
2
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1answer
738 views

Mac OS X TCP/IP fingerprint obfuscator

For several reasons, I need to either prevent my OS X machine from showing up as an OS X machine in TCP/IP fingerprinting, or make it show up as, say, a Linux machine. Is there an OS X program out ...
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1answer
117 views

Need to split up packets and rebuild again at destination

Cant go into too much details here for various reasons but here's what I've got. I've a host which replies to a terminal with a receipt containing info of what items have been purchased at the ...
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1answer
66 views

Corrupted data from terminal to Host

Ive got a terminal which sends data to a host that is wrapped with <stx> and <etx>. However when it enters the network it always has 5/6 bytes of junk data in place of the <stx> and ...
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1answer
692 views

Replace sensitive IP addresses in Wireshark with XXX.XXX.XXX.XXX

What would be an easy way to replace a sensitive IP address in a Wireshark packet capture with XXX.XXX.XXX.XXX? When I export the pcap in txt or csv I can no longer import it into Wireshark.
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1answer
337 views

How far a loopback packet sent from an application layer goes on TCP/P layers?

Assuming that I want to check if my ethernet card is working fine, if I send a ping from a cmd on Windows, how far the sent packet will go? I mean, the packet will fall down over all the TCP/IP layers ...
4
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1answer
15k views

How can I disable any TCP/IP port on a Windows 7 machine?

I need help on finding out how to disable any particular TCP/IP port on a Windows box whenever a need arises. I googled before posting the question and I got links to articles mentioning only ...
2
votes
0answers
235 views

Mounting an NFS share with udp or mntudp options

According to the documentation of NFS client on Mac OS X 10.7 user can specify following options: udp Use UDP transport protocol. and mntudp Force the mount protocol to use UDP transport, ...
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2answers
1k views

Tampering TCP data on a Windows application

Is there an application where I can run another application and it will allow me to see and more important manipulate the TCP data sent to another server? I'm using Wireshark to view the data, but I ...
2
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3answers
4k views

Why was 169.254.x.x chosen as self-assigned IP? [closed]

Were there any particular reasons that 169.254.x.x was chosen as self-assigned IP? Its binary form doesn't look nearly as "whole number-ish" as other commonly used IPs like 127.0.0.1 or 192.168.0/1.1.
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4answers
47k views

How to get a Port to listen on Windows 7?

I have followed the step by step instruction to open a port on Windows 7, setting both Inbound Rules and Outbound Rules to following specification: Protocal Type: TCP Local Port: 55000 Remote Port: ...
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1answer
1k views

Open port in Window 7 for local client-server development and debugging

I am writing a C# console application for Windows 7 that can send and listen to packets (client or server). Since I only have one computer, I will have to debug and test my code locally. I first ...
0
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1answer
568 views

Very slow hostname resolution in Windows XPe

Hopefully a simple question to answer. I've built an XP Embedded image, and it takes from between 17 and 25 seconds for me to resolve to an IP when I ping google.com. Once it gets the IP address, ...
0
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1answer
918 views

Router/modem TG580v2 giving weird results

In my setup, I have the Thomson's TG580v2 router/modem, my PC connected to it via cable, and AppleTV, iPad and iPhone connected wirelessly. First issue: AppleTV can't find my PC unless it is ...
10
votes
4answers
58k views

How to kill a particular tcp connection in windows?

On Linux we can kill an Established TCP Connection using tcpkill command. For example, to drop all connection to/from a particular IP: tcpkill host ipaddr Or similary to kill all connection ...
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3answers
3k views

Uninstall TCP/IP Windows XP (uninstall is greyed out)

A laptop displays "aquiring network address" continuously for both wired and wireless network connections. TCP/IP is set to obtain an IP address automatically, and use an automatic DNS address. DHCP ...
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0answers
1k views

Assign IP address to a Virtual Printer

Is it possible to assign an IP to a virtual PDF Printer? Is there any Virtual printer software that automatically can do this?
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1answer
146 views

Windows 7 does not give a warning when subnet on a network with DHCP conflicts with one of the existing static subnets on another adapter

On the client-side, i have a loopback adapter at 192.168.1.1, with a 255.255.255.0 mask. I also have a wireless connection that does not work when the loopback adapter is enabled. Would it make ...
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3answers
2k views

Function of Routers as LAN?

Here's a quote from TCP/IP First Step - Book Router's role is to figure out what to do with IP packets that it receives. One thing routers can't generally do is function as a LAN. They can ...
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2answers
725 views

How do I test the maximum TCP/IP transfer rates of my computer?

In Delphi, I am writing client software for open source message brokers, and would like the transfer rates with a realistic upper limit of what can be achieved on my local computer, or between my ...
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2answers
2k views

Is my ISP blocking the ports 5050 and 6060

I want to find out whether or not my ISP is blocking the ports 5050 and 6060 which I need for my voip software on my iPhone. I'm using a 3G stick with a prepaid plan, and I'm using the internet ...
2
votes
4answers
19k views

Can't find a wireless access point's IP address after changing router IP/LAN settings

I have a modem/router, Netgear DG834, and a wireless access point (AP), Netgear WG602. The AP is directly connected to the router. My old working configuration was: Router IP address : 192.168....
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2answers
330 views

TCP Window Scale

I am searching that, how can two sides determine which scale factor will be using? In syn packets we can give a scale factor and than when two sides have the any scale factor, we can understand that ...
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1answer
1k views

Which free software can convert Serial to Ethernet?

I'm using Serial over Ethernet, but it's not free. Is there any free software that can do the same thing?
3
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1answer
278 views

Why is the DNS setting part of Windows TCP/IP setting dialog? [closed]

The DNS servers setting has been part of the Windows TCP/IP setting dialog since the earliest version of Windows as far as I can remember (Windows 95). However, a host may have multiple network ...
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1answer
869 views

Determining cause of TCP/IP connect issue

I need HTTPS access to the host ws.betaqxl.com, but connect fails: :: curl -k -v https://ws.betaqxl.com * About to connect() to ws.betaqxl.com port 443 (#0) * Trying 91.204.81.183... Timed out * ...
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2answers
8k views

On the Performance of TCP implementations of Linux and Windows

I understand the implementation of TCP stack in windows and Linux are different. Windows uses a congestion control algorithm known as the TCP Reno while Linux uses Cubic. How do the 2 protocols ...
2
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1answer
964 views

TCP Throughput testing tools with ability to rate-limit?

I'm looking for test software that can generate test streams with the TCP/IP protocol, but limit the rate of the test data. For example, if using 100Mbps Ethernet, I would like to be able to generate ...
3
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1answer
1k views

Where do I find the TCP/IP stack in Process Explorer on Windows 7?

I was wondering, if the TCP/IP stack is part of the kernel or running as a service? Where do I find the TCP/IP stack in sysinternals ProcExp?
6
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1answer
124 views

If a major telco line is cut to a region of the world, is the “Internet” still available for sites served from within that region?

Can the Internet work independently within various regions of the world or are there safeguards in place that take down portions of the Internet-network (yes, I see the redundancy) when a major telco ...
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0answers
281 views

TCP/IP optimization in XP and higher? [closed]

I heard TCP/IP settings were just optimized for 10/100 LAN. Would TCP/IP optimization for broadband like cable make any difference to performance?
3
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2answers
600 views

Three way handshake conundrum

I am attempting to understand the three way handshake however have difficuly understanding how this applies to a real-world scenario. For example if I am using a web browser such as Mozilla Firefox ...
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1answer
2k views

Can't access HTTP server, but ping works in LAN

I encounter a problem when configure the connection. My computer resides in a LAN, I want to assign it a static IP address. Thus with the help of port mapping on the router, I will be able to access ...
0
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1answer
47 views

How to track down a Windows 7 networking problem

In my attempts to make a remote controlling a Windows 7 x64 machine perform better, it appears that I made things MUCH worse. Problem is, I undid all the changes I had made and the computer still isn'...
0
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1answer
169 views

Windows connection limit

Windows XP is said to have a connection limit. There are some patches that increase this limit to 100 or higher. I was just wondering if my download speed (from torrents, etc.) or number of ...
0
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1answer
64 views

LAN server emulator application

I am looking for a LAN server emulator application capable of doing the following: Can connect to it from another application via TCP/IP Can send some binary data to my applications Of course I ...
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vote
1answer
2k views

How TCP/IP works, step-by-step [closed]

In early days, I "googled" looking for a detailed guide/manual on How TCP/IP works; specially data flow; By example, What happens when I type "http://superuser.com" in web browser and it's receive ...
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1answer
171 views

TCP/IP Drivers for QNX 4.2

Does anyone have, or know where I can get my hands on TCP/IP Drivers for QNX 4.2 qnx.com wants ~ $400 for the drivers.. I'm hoping someone has written their own or knows of some good free ones.
2
votes
1answer
13k views

How to change TCP “time wait” delay in Windows 7 / 2008 Server?

Windows Server 2003 "offers two methods of controlling TIME-WAIT behavior." The TcpTimedWaitDelay registry value under the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters ...
0
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1answer
1k views

DatabasePath Registry Entry Not Working in Windows 7

I’ve set the HKLM\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DatabasePath registry entry in Windows XP and it works as expected; the system loads and uses the HOSTS file in the directory I’ve ...
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1answer
114 views

Opening multiple web links causes pages to 404 or timeout

I'm using chrome/firefox on windows 7, on fiber, at the office. When browsing the web and opening multiple concurrent pages some of them will 404, timeout, or hang. This doesn't seem to happen to ...
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5answers
15k views

Does Windows XP only allow 10 inbound TCP/IP connections at any one time?

I tried to connect 40 clients to a webservice that is on Windows XP and I get no connection. Are the inbound TCP/IP connections on Windows XP limited to 10 at any one time?
3
votes
1answer
891 views

Detect changes to routing table or address resolution protocol on Windows 7

On two different Win7 PCs we're having a very specific problem where connecting a device which uses a RNDIS driver sometimes disrupts the PC's network adapter connection (we detect this because we ...
0
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1answer
412 views

Random BSOD, even when the computer idles

I get a random BSOD, even when the computer idles. Already tried: memtest - ok scandisk - ok netsh int ip reset Winsock fix. tcpip.sys+2c13e 21.06.2011 15:21:00 DRIVER_IRQL_NOT_LESS_OR_EQUAL ...