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.

learn more… | top users | synonyms

0
votes
1answer
14 views

View connection messages [closed]

I'm investigating some bugs on a Android Application, that uses a Third-party plugin. I need to view all connections messages between this plugin and a server. There is some way to list all send ...
-1
votes
1answer
37 views

How do you view a printer's IP address on a school protected network?

How do you determine the ip address of a network printer whose menu options on the printer has been disabled by school admins? Printing the configuration page does not show the TCP/IP information. ...
0
votes
1answer
26 views

In VMware what are the differences between the network connection options?

In VMware there are the network options I'm unsure what to choose. I've red the documentation here but find the situations it describes are too complex with my needs. I just want the internet to ...
0
votes
2answers
62 views

Free official documentation for cables and models? [closed]

I've been looking through the ISO and IEEE sites for official documentation on the Open Systems Interconnection (OSI) model, TCP, and a range of cable standards (5/5e/6). However, other than on the ...
0
votes
2answers
67 views

Disabling “Use default gateway” on TCP/IPv4 kills the VPN connection

My work network requires you to disable the default gateway to use home directories etc. remotely. However, disabling the default gateway disables the VPN connection. Any solutions? Thanks.
0
votes
3answers
126 views

Source Address:Port vs Destination Address:Port

I am new to TCP/IP and trying hard to learn basics. Well, I really wonder about inbound rules and outbound rules of Firewall and concept of source adress:port, destination adress:port. For example I ...
0
votes
1answer
57 views

VMware Workstation isolating guest to a separate internet

I have N1 and N2 network. The host has two ethernet adapters E1 and E2. The host is connected to N1 through E1, but I want to connect a guest to N2, and I do not want N2 to affect the host by any ...
0
votes
0answers
50 views

BOOTP packets blocked while DHCP packkets are accepted

We have an IP system that makes use of BOOTP for updating our embedded devices over IP. The main app uses DHCP for its IP configuration. Our devices are usually on the network of the customer, the ...
0
votes
0answers
35 views

Virtual machines using wrong IP addresses

I have a host computer (A), running three virtual machines: X,Y and Z. They're under a NAT layer, in which the Host A is the gateway (192.168.0.1/16), and the VM's are respectively 192.168.0.2 (X), ...
0
votes
0answers
13 views

TCP behavior in microsoft products

What happens when a TCP SYN segment is received on a closed port? Does windows send a RST or it just ignores it?
0
votes
1answer
38 views

How to say windows not to use specific network connection for Internet traffic? [duplicate]

I have slow VPN connection to another computer, which is also connected to internet as my computer is. When this connection is active, all browsing traffic goes via remote computer, although it is ...
1
vote
2answers
131 views

How to make my computer think an IP is somewhere else

I have a local app which code I do not own and tries to directly connect to some IP, let's say 123.45.67.890. For testing purposes, I would like to re-route that connection to somewhere else, another ...
1
vote
1answer
41 views

How to configure the physical machine and virtual machine?

If I want to transfer data between the physical machine (windows operating system) and virtual machine (Linux real time operating system). Could anyone please explain about configuring the data ...
-1
votes
1answer
26 views

How does an ADSL modem tell which local client to associate with each response from a server?

Does an ADSL modem generate a random string for each request I make and when response comes it directs it to my computer (but not to my phone)?
1
vote
0answers
29 views

Looking for a tool or technique that show IE or Chrome ask right net adapter or choose right route to connect to an IP on Internet

Using Windows 8.1 Enterprise, When I surf the internet, I feel that there is a connectivity issue within my network stack. Any time try to open a page, there is delay. Once the browser connects, the ...
0
votes
0answers
91 views

Configuring an experimental TCP/IP computer network using a virtual machine

I don't have extensive experience to computer networks and I would like to practice using a Linux distribution and virtual machines like virtualbox or vmware. I imagine a host Ubuntu/Linux PC and a ...
2
votes
1answer
75 views

How to monitor TCP and UDP port changes

I am running software on a server that may be turning off some ports and need to find out what it is. I have the ports I need to check. I just need to find out what is turning them off. How can I ...
0
votes
1answer
87 views

Firewall between Client and Server - Which ports do you open?

I want to know the following: (exam type question) When you have a client-server system, that uses uncommon ports (e.g. in range 48000 - 49000), and you have a firewall between the client and the ...
2
votes
3answers
275 views

How to mitigate BufferBloat on an ADSL connection?

I've had interesting networking experience before. Before I moved, I've had a VDSL connection, with 3mb uplink. (The down speed was around 30mb but is not relevant at this moment). Whenever I ...
2
votes
1answer
77 views

Getting Correct IPv6 Address from given prefix

On my windows xp machine, i have this information: IP Address: fcb1:cafe:1:9e33::2 Default Gateway: fcb1:cafe:1:9e33::1 It works fine, and i can ping the gateway. However now there is another ...
6
votes
1answer
98 views

Occasionally unable to connect to single web page

Occasionally, one of my users will be unable to connect to our web-based email (simple timeout, page cannot be displayed, errors). The problem persists for days (and between reboots) then eventually ...
1
vote
4answers
94 views

Is it tecnically incorrect to claim that TCP/IP connection was established with an IP address?

In case where an IP address is assigned to a cable modem and utilized by computers on the home network through a router connected to that cable modem is it tecnically incorrect to claim that TCP/IP ...
1
vote
1answer
61 views

Connect to site with IP but showing as URL

I think this may not be possible because of the way the TCP/IP protocol defines packets, but I figured I'd ask. Some sites, such as those on shared servers, use the same IP and the server delivers ...
-2
votes
2answers
1k views

Does TCP/IP model has 4 layers or 5 layers?

In some sites , It is given that tcp/ip has 4 layers,network access,internet,transport,application. But in some other references , it is given that it has 5 layers (instead of network access, physical ...
0
votes
1answer
185 views

Is it possible to have a Linux box with 2 Ethernet adapters, connected to 2 networks with same IP range (no routing needed)?

Bear with me. This relates to this Stack Overflow question. My Linux thing (actually a BeagleBoard) has two interfaces, eth0 and eth1. It needs to connect to a client's network on eth0 (address ...
0
votes
1answer
269 views

Network switch losing TCP packets between devices and a PC

I have a custom AVR microcontroller board that has a TCP/IP module (chip) for communication with PCs. My PC has a 4-port Gigabit Ethernet card. Each port is connected to an Ethernet switch HP ...
0
votes
1answer
46 views

Printing Over the Internet

I would like to know how to allow certain people, with unique user names, to be able to log in over the internet (not LAN) and be able to print their documents to my printer, which is connected to my ...
0
votes
1answer
366 views

Allow all inbound traffic from specific IP addresses

I am running one of our server applications on Windows 7 and I'm having trouble with the firewall. The application receives various events over TCP from a network device but the connection port varies ...
1
vote
1answer
67 views

How to inspect DSL router?

There is a DSL connection and a DSL router (Speedport W 701V). After some days or weeks (I didn't record the events) the router makes some problems. Internet connection is ... broken but not ...
0
votes
0answers
23 views

What is a good tool for simulating SLIP data packets on Windows

I have a board which supports SLIP. But I need some tools to control this board on windows. What are some of the free tools available which support this? I can get the board to show up as a COM port. ...
0
votes
2answers
117 views

Monitor Application Network Activity

I use TCPlogView to see all tcp activity of a software. for example: An app (sample.exe) downloads this file in background: google.com/dl/sample.txt when I track it with a TCP software I see this: ...
0
votes
2answers
186 views

How are local ip addresses separated from public ones?

How does tools like ping, or any other tool that uses the tcp/ip protocol know that for example 192.168.1.1 or 10.0.0.1 is a local ip address while 8.8.8.8 or 74.142.23.95 are public? are 192.168.x.x ...
0
votes
2answers
515 views

Why don't outgoing TCP/IP connections need firewall ports to be opened?

While creating an incoming TCP/IP or UDP connection we need for a firewall port to be opened or to get privilege for the specified port. Why not for outgoing TCP/IP connections?
2
votes
1answer
346 views

Change TCP sequence numbers for packet replay?

First off, I'm using wireshark for capture and colasoft for replay. I'm attempting to replay a group of captured packets back, looped to be done several times over (the purpose of this is just to send ...
0
votes
3answers
256 views

How to monitor TCP connections over time

I have an application which is a windows service. It accesses a number of other services using TCP/IP. E.g. sql server databases, informix databases, mail servers, etc. For instance it will also ...
-1
votes
2answers
40 views

No ping response, still transmitting data [closed]

Why would a device with a static ip not respond to a ping, but still transmit information over the network? In my situation the device is a very simple caller ID box. It has no GUI. It's only purpose ...
0
votes
1answer
112 views

how to setup linux-igd to use webserver on same machine

So I have a web server on port 80 and linux-igd/upnp running on the same machine using dhcp. I want to configure linux-igd to be a way to get to the webserver. I found this tag in the linux-igd xml ...
2
votes
2answers
3k views

How to increase the TCP timeout on Windows 7?

For a test purpose, I would like to increase the default tcp timeout to say 2 mins. I tried this: How to set TCP/IP abort interval or timeout in Windows XP? http://support.microsoft.com/kb/170359 ...
1
vote
1answer
394 views

How do I prevent Linux kernel from responding to incoming TCP packets?

For my application, I need to intercept certain TCP/IP packets and route them to a different device over a custom communications link (not Ethernet). I need all the TCP control packets and the full ...
1
vote
1answer
2k views

Resetting TCP/IP Settings on Windows 8

Apparently, there's a command: netsh int ip reset which is known to reset TCP/IP settings for Windows XP/Vista/7 and I'm not sure how it works correctly on Windows 8. When I typed the command ...
0
votes
1answer
194 views

Down sides of lowering tcp time_wait value on windows server 2008

i am building an adserver. In tests i see lots of TIME_WAIT state due to the use of an in memory db redis. Forums suggested lowering the time wait value from registry. Any down sides ?
0
votes
1answer
81 views

Where'd my wireless go?

Got an old Lenovo R60e running XP Home that I use for misc. wireless tasks around the house. I had need to print from a fixed workstation to a USB printer in another room. So, I turned on printer ...
0
votes
1answer
43 views

Unable to query ports on windows network

I have 2 environments that need to speak with each other, 2 servers are sitting in our test environment and 1 is in our corp environment. Client A was setup over a year ago and works as expected, I ...
1
vote
1answer
610 views

Trouble getting VPN to work with my router, possible WPAD issue

I've been having a problem using Cisco Anyconnect VPN on Windows 7 with my wireless router (a Belkin F5D8635-4 v1 Wireless N). It connects sometimes, but often won't until the router has been reset. ...
0
votes
1answer
170 views

FTPS - Cant Open Data Connection over WAN

Here is my setup, 1 Windows 2008 R2 Standard Box /w G6 FTP Server installed G6 is configured to use explicit SSL connections only (TCP:990) 1 WatchGaurd Firebox Firewall (between server and internal ...
0
votes
1answer
498 views

Capture TCP communication on a specific port using wireshark

Hi i have build a simple TCP server which listens on port 9999 and has an IP address 202.168.66.1 i have a TCP client which has the same ip address and connects to the server on the said port. Now ...
0
votes
1answer
150 views

How to know which Windows application does listen on a particular TCP port? [duplicate]

I have been using a personal HTTP proxy to remove ads and boost caching for a while but have then noticed that my Firefox still works when the proxy application is shut down (while the browser is ...
2
votes
2answers
573 views

TCP header option: SACK-permitted (Selective Acknowledgments) negotiation

I'm doing a research project, which needs to split tcp connection. so I have some pecular questions, which may happen in my development. The problem is understanding of TCP SACK-permitted ...
0
votes
0answers
91 views

Is there a Windows driver that can masquerade a telnet connection as a serial port?

I've some hardware which works via IP (https://www.sparkfun.com/products/10822 - RN XV WiFly). The device has RX/TX lines, connected to another device I am communicating with (an Arduino) - using ...
0
votes
0answers
166 views

how tcp stack deal with the ack_seq number and seq number of tcp FIN/ACK packet?

from my knowledge, seq and ack_seq are processed by tcp stack independently. when a packet arrives with a inconsistent ack_seq number if: 1) the ack_seq number is obsolete(smaller than expected), ...