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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XP Pro will not allow Hamachi or skype connections but internet and other apps ok

XP Pro version has both wireless and LAN connections. Both work well for all traffic(web, mail, update servers, telnet... etc.) However both Skype and Hamachi fail to resolve. Opened the firewall ...
2
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2answers
636 views

Force command-line tool to use different interface?

I have a service which I want to run over eth1. But all my other traffic still needs to run over eth0. Is it possible to force a command-line tool or other application to use the non default ...
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2answers
295 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. ...
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2answers
553 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 ...
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1answer
53 views

Is there a way to know WHEN a connection has been established?

I'm working with mobile IPv6 and was dealing with lots of zombie connections. I set keepAlive to true and want to test whether old connections are being discarded. I'm using lsof to list the process ...
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1answer
25 views

Where can I change IPv4 Domain name on HP CP3505 Laserjet printer?

I can't seem to find the settings under the menu. I tried to find it under TCP/IP but to no avail. I forgot to add that under IPv4 it says ARP Duplicate IP Address...
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1answer
5k views

how to enable 'Properties' button of TCP/IPv4 in Network connections in Windows 7

In the Control Panel\Network and Internet\Network Connections, I have a Wireless Network Connection. When I right-click on it, a properties dialog opens. Now, I need to change the IP address for ...
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1answer
45 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 ...
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1answer
311 views

IP checksum offload

I recently updated to Windows 8 and get alot of invalid packet transfers. It says "Ip checksum offload?" (Wireshark) and most of my packets get lost. The checksum is 0x00. I also updated my NIC ...
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1answer
434 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
713 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?
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1answer
600 views

Fix Internet connection stalls (packets getting stuck somewhere?)

The wireless AP I've been using has glitched out and the two symptoms are the DHCP server no longer working, and random stalls in the connection. I can't reboot it, so I've been trying to solve the ...
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1answer
129 views

workstation 7 and host-only no connectivity

I have a WinXP 32 host (IBM T400) with VWware workstation 7 (7.0.1 build-227600) and some guest OS (Win xp, NT, etc.) I can ping from the host to guest OS and vice versa, but... every other ...
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1answer
10 views

Redirect TCP/IP to COM port driver

There are many programs which emulate a COM port and let you redirect it to an ethernet port. I want to do the opposite of that. Create a virtual ethernet port that redirects to a physical COM port. ...
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1answer
55 views

tcp retransmission on lan, wifi is fine

I have a Dell XPS 17 laptop (about 5 years old) running Windows 7 and a Synology RS412 NAS. I also have various other networked devices (servers, routers, laptops, pcs). Some are in my domain, some ...
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1answer
87 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 ...
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1answer
129 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 ...
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1answer
55 views

DHCP/routing oddness

I have a Squid proxy server on my network that is connected to the DHCPd server (commodity router) through a commodity switch. If there is a break in the connection (eg router needs to be rebooted) I ...
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1answer
183 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 ...
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1answer
239 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, ...
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1answer
207 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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1answer
63 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
305 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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1answer
99 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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1answer
269 views

my tcpdump always filters packets?

I've been using tcpdump for about a month now, and recently, it has stopped capturing any packets that were not sent to or from the computer running tcpdump. I've stripped down my command to just: ...
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1answer
600 views

Win 2k3 Connections Limit per ip:port

I want to limit connections number per ip on specific port. Should I use some firewall or anything else? Advice please. P.S. Port doesn't have to be port 80, or 3389. It can be any port
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1answer
77 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. ...
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0answers
670 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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0answers
254 views

Service to transparently use an HTTP CONNECT proxy on Linux

As our corporate network provides an HTTP CONNECT proxy for people who need to connect to the outside world, and as every Linux application needs to be set up specially to use it, I was thinking about ...
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0answers
203 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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14 views

How to switch between DNS suffixes using CMD (netshell)?

at my job, I have to manually switch between: 1) append primary and connection specific DNS suffixes and 2) Append parent suffixes of the primary DNS suffix a bunch of times per day (due to a ...
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33 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 ...
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124 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 ...
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322 views

TCP/IP Netbios fail; Dependant service “NetBT” not installed

I've been hit by zeroaccess virus last week, it corrupted the internet connection and dns system. I cleaned everything and everything is working fine except pppoe connectins, they fail with Error 720 ...
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113 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 ...
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0answers
50 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), ...
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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?
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104 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 ...
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0answers
24 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. ...
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184 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), ...
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50 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 ...
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0answers
492 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 > ...
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123 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 ...
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0answers
3k 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 ...
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0answers
3k 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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860 views

why does my time warner cable modem connection enter dead period states every 20 mins?

My wifi connection (from my MacBook running Snow Leopard) to a Time Warrner cabel model and router has a recurring connection problem. Every 20 minutes or so it will enter a "dead state" where no ...