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
25 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
66 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
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
49 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
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
128 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
3answers
274 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 ...
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 ...
-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
268 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
363 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
2answers
116 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
3answers
255 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
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
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 ...
0
votes
1answer
167 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
494 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
570 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
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), ...
0
votes
0answers
45 views

Determining contributors to elapsed time during a network request

The situation: There is a remote server. I am running a client program that makes calls to the server and requests data. These requests perform very slowly. The server limits the number of results ...
7
votes
1answer
582 views

Tcpip error: Request failed due to all such ports being in use

Today my machine stopped being able to access the internet. I can still access some local network resources. When I looked in the error log I saw following tcpip warning: A request to allocate an ...
0
votes
3answers
146 views

How do I test network performance between server and smart-devices

I am currently working on a test use case where I need to test performance (benchmark) between a server/computer and smart-devices (tablet, smartphones etc.). The benchmark I want to do is based on ...
1
vote
1answer
432 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
116 views

How does the browser know which packet is the response to a specific request?

I am sniffing the in/out packets over TCP. I have some GET output, but I want to know which of the packets is the input? How does the browser determine this? Simpler explaination: I'm sniffing and I ...
0
votes
0answers
400 views

DNS server keeps changing from Auto to Manual

A friend at a company I know has a fairly new Windows 7 laptop. She was complaining that the "internet doesn't work". After looking at it the first time, in Wireless > Status > Properties > ...
0
votes
0answers
109 views

Please get me outta here.. Stubborn APIPA

Any one please help me.. I am getting an APIPA since three days.. I did all the steps mentioned in answers to this question. Still they did not resolve my problem. At last I formatted whole of my ...
1
vote
1answer
102 views

Limiting upstream rates for web in Ubuntu 12.10

I found this thread, but am hesitant when it comes to screwing with my network settings. What I want to do is limit the rate that people can download files from my webserver remotely. LAN ...
0
votes
2answers
250 views

XP to Win 7 via ethernet cable. No routers, no wireless. They can't ping each other

I've got a windows XP machine and a windows 7 laptop connected by an ethernet cable. The xp has static ip address 169.254.84.221 and the windows 7 has 169.254.84.220. both subnet masks 255.255.255.0. ...
1
vote
0answers
118 views

Why are there limitations on TCP segment size?

I have a question about the limitations on the segment size in the transport layer. Since the data has to get to the lower layers why will it be fragmented? Finally the data is sent in bits at the ...
0
votes
0answers
2k views

How to reset Host Only Adapter Networking for Oracle VirtualBox VM Manager

My Host Only Networking stopped working, how do I reset it ? I tried disabling and re-enabling Local Area Connection and VirtualBox Host-Only Network but VirtualBox Host-Only Network is still ...
3
votes
2answers
448 views

No route to host after changing interface to static ip

I installed a Linux (Ubuntu) server inside my home LAN, initially it's automatically configured to use DHCP interface. I'm connecting to this server from another computer using that server's hostname. ...
2
votes
2answers
2k views

Are Segments, Packets and Frames the same size if we ignore headers?

I've looked for some explanation about the differences between Segments, Packets and Frames, and from what I read: Segment is the original data + Transport Layer header. Packet is a Segment + ...
0
votes
1answer
174 views

Is it possible to figure out which http request generated the corresponding response

I am using iptables to listen to tcp (http) packets. I am filtering out INPUT responses containing a matching string. Is it possible to know which http request generated the response. Assuming 10 ...
1
vote
4answers
2k views

Disable access to TCP/IP and DNS Network Settings on Windows 7

here's my question: i have a desktop pc Windows 7 powered with two accounts with administrative rights. One of those is used by my brother. I study abroad so i need to be able to connect to my ...
2
votes
1answer
395 views

What is protocol suite?

I came across protocol suite in Internet Protocol suite, and after I searched for it I found: http://en.wikipedia.org/wiki/Protocol_stack#General_protocol_suite_description which explains protocol ...
0
votes
1answer
147 views

LPR Utility for Windows 98

I'm trying to print to a network printer through TCP/IP in windows 98, however, windows 98 does not support printing to a TCP/IP port, so I read that I can do it through something called LPR. Where ...
1
vote
2answers
832 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 ...
-2
votes
2answers
2k 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 ...
0
votes
4answers
130 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 ...