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Questions tagged [networking]

For questions on connecting devices together so that they can communicate with each other, as well as questions on networking equipment such as routers and switches.

132
votes
12answers
222k views

How can I make the Windows VPN route selective traffic (by destination network)?

I want to use a Windows VPN but only for a particular network, so that it doesn't take over my entire network connection. e.g., Instead of the VPN becoming the default route, make it only the route ...
32
votes
10answers
158k views

How can I monitor internet usage in my network?

I need to know which computer is consuming my bandwidth. Is there a tool to do this?
34
votes
8answers
83k views

Merging two incoming broadband lines for faster Internet

We have a broadband line coming into our building which delivers around 8-10Mbps, which is okay but not great. Fiber is available in our area (30-100Mbps) but it's not available where we are just yet. ...
56
votes
3answers
57k views

How to launch a command on network connection/disconnection?

I have a wifi connection that requires to authenticate using a web form once the wireless link is established. I know how to automate the authentication with a script that uses curl/curlIE. But how ...
9
votes
4answers
5k views

Unable to access outside service from inside LAN

I have a weird port forwarding problem. I tried to open my port 22 to the outside network. I was able to access it as long as I am not inside the LAN. I can access it from my office for example. But ...
16
votes
2answers
10k views

Is your MAC address revealed when you hit up a website?

When you hit up a site, such as cnn.com, does the TCP/IP packet contain the MAC address of your network card? Could cnn.com theoretically record my MAC address?
19
votes
2answers
58k views

Expanding wireless coverage: What are the differences between LAN to LAN and LAN to WAN when it comes to connecting two wireless routers?

I'm trying to link two wireless routers with an Ethernet cable in order to expand my wireless network. Both routers need to provide wired and wireless Internet access. I'd like to know the ...
28
votes
2answers
277k views

Difference between Ethernet splitter and switch

I have one Ethernet port that is wired directly to the router on another level. However, I want to run a desktop and a server both off this one Ethernet port. Can anyone tell me the difference ...
9
votes
2answers
11k views

direct ethernet connection between two wirelessly connected Windows 7 laptops

I've got two systems that are right next to each other, and connected wirelessly to the same router. I want to connect the two of them together with an ethernet cable - both have gig-e and ...
12
votes
8answers
68k views

How to bond two different internet connections [duplicate]

I have two internet connection, each with 4mbps bandwidth. I want to join/merge both of them to get 8mbps speed, both routers have WLAN and LAN capability. How to Double my speed using two routers? ...
26
votes
3answers
160k views

How to monitor bandwidth use of each device on wifi network

I have in my home a standard Comcast cable internet connection. I have it going from the wall to a cable modem, and from the modem to a late-series Linksys router, which provides wired and wireless ...
125
votes
19answers
234k views

Why is 'ping' unable to resolve a name when 'nslookup' works fine?

On my Windows XP workstation, I can find the machine I want to connect to in DNS with nslookup: nslookup wolfman Server: dns.company.com Address: 192.168.1.38 Name: wolfman.company.com Address: 192....
80
votes
10answers
418k views

How to install Windows 7 from the network?

Is it possible to install Windows 7 (Current RTM Version) on a computer without using removable media like DVD or USB? The first thing that comes to my mind is through the network, but I don't have ...
30
votes
7answers
107k views

Use VPN connection only for selected applications

I have access to a VPN and want to use it only for some applications, not all. For example: If I connect to a VPN I want only the applications Opera and Newsbin to use that VPN connection. All other ...
17
votes
7answers
109k views

Enable/disable wireless interface in a bat file

Is there a way to enable/disable a wireless network interface via the command line (so I can put it in a bat file)? When I'm in the office I use a wired connection, but Windows still occasionally ...
209
votes
15answers
158k views

How to reliably keep an SSH tunnel open?

I use an SSH tunnel from work to go around various idotic firewalls (it's ok with my boss :)). The problem is, after a while the ssh connection usually hangs, and the tunnel is broken. If I could at ...
87
votes
9answers
286k views

How to do networking between virtual machines in VirtualBox?

I have two virtual machines in VirtualBox. I would like to do networking between them. For the moment I have the default configuration on both, but they seem to have the same IP-address 10.0.2.15. I ...
12
votes
5answers
14k views

A good solution to switch between different network settings?

I use my laptop (Windows Vista Ultimate) to connect to a wireless network in college, which assigns a dynamic IP address, and at home, with a static IP address and DNS server. I'm looking for a good ...
10
votes
3answers
22k views

How to find exe listening on port?

I try with netstat -ab -p tcp -n and among the results get: TCP 0.0.0.0:47001 0.0.0.0:0 LISTENING Can not obtain ownership information I am running as administrator and ...
112
votes
10answers
398k views

Make Windows 7 ignore WiFi when ethernet is available

When I dock my Windows 7 laptop, I want it to prefer the wired ethernet connection over WiFi. This is a pretty straightforward thing to do on my Mac - I just reorder my network preferences, and it "...
5
votes
6answers
8k views

Software for measuring internet traffic? [closed]

I'm interested in finding a free piece of software for Windows XP & 7 that allows us to measure both incoming and outgoing internet traffic, but not traffic between users of the local network. I ...
4
votes
2answers
5k views

How to configure sharing on a small Windows 10 network since HomeGroup is gone?

This is apparently a common problem but I have not found a solution. With the deprecation of HomeGroup after the release of Windows 10 version 1803, I cannot get two computers to maintain network ...
31
votes
10answers
16k views

Application for monitoring all applications that are using the internet in Mac OS X

Can anyone introduce me a Mac OS X application that monitors all network activity such as what applications are now connected to the internet and how much bandwidth they use (I mean show bandwidth ...
38
votes
6answers
74k views

How does Windows 7 decide which route to take if 2 connections to an internet source exist? (e.g. a Wireless and an Ethernet one to a router)

How does Windows 7 decide which route to take if 2 connections to the Internet exist? (e.g. wireless versus wired)
20
votes
9answers
41k views

Is it possible to host a web server from behind a NAT

My PC is behind a NAT router that has a public IP address. If I want to host a website then I believe I need a domain name which I can purchase from some site which would pledge to resolve all DNS ...
10
votes
1answer
4k views

How can I force certain applications to use specific network connections?

Let's say I have two active network connections that let me out to the internet. I want certain applications to only use Network Connection 1, while some others should use Network Connection 2. Is ...
17
votes
4answers
10k views

What would be the disadvantages of using a 4 stranded ethernet cable?

I got this cable with a homeplug AV 200 device - its labelled cat 5e But looking at the plug end has me rather dubious about it. (There's only 4 strands there, not the standard 8 - and missing pins, ...
34
votes
2answers
107k views

How to block all traffic but one IP in Windows Firewall?

I'm trying to use Windows 7 firewall to block all outgoing and incoming traffic, from all IP's and for all protocals, except for UDP to and from one particular IP address. The reason why is because ...
53
votes
3answers
38k views

Is there a way to find out what application using most of bandwidth in Linux? [closed]

I'm looking for an utility that could show me how much of a bandwidth each process are using. It should just print the data and exit as I want to feed that list into conky.
34
votes
7answers
169k views

Why does just splitting an Ethernet cable not work?

I thought the Ethernet is logically a one-line communication bus (for argument's sake, I am excluding hubs). All machines attached on the bus hears the same signals and the machines themselves try to ...
38
votes
7answers
143k views

What is a subnet mask, and the difference between a subnet mask of 255.255.255.0 and 255.0.0.0?

My DSL/WiFi router provided by my ISP has an internal IP address of 10.0.0.138, the addresses provided by DHCP are in the format of 10.0.0.xxx. Now, I want to start using static IP addresses on my ...
5
votes
4answers
2k views

Desktop Internet traffic measurement software [closed]

Can you recommend a robust Internet traffic measurement tool you had experience with? Robustness is important because I've used a couple of such tools but ended up uninstalling them because of ...
11
votes
1answer
17k views

Can't set manual IP to Virtualbox Host Only adapter in CentOS 6.5

When I configure the IP address of VirtualBox 4.3.2 (running on Windows 8.1) host only adapter, it changes it back to some other IP. Guest OS is CentOS 6.5. I tried to set the IP in network ...
11
votes
3answers
183k views

Can I use CAT5e jacks with CAT6 cable?

I was wondering if I can use a CAT5e keystone jack with CAT6 cable. I am refering to the parts that terminate a cable where it comes out of the wall. I want to run a 30 ft length of CAT6 but all I ...
4
votes
3answers
6k views

Set up a web server behind a Carrier Grade NAT

I was trying to set up a small home server. I use dynamic IP adress. My router's wan adress is like this 100.70.81.xxx and my public ip is 81.213.177.xx I made port forwarding in my router. www, ...
154
votes
10answers
218k views

Disable “These files might be harmful to your computer” warning?

I keep getting this irritating warning when copying files over the network: These files might be harmful to your computer Your internet security settings suggest that one or more files may be ...
44
votes
7answers
53k views

Force an application to use a specific network interface

I'm using multiple network interfaces (LAN and Wireless), and I've noticed that there's a way to change the order of prefered interfaces. How can I use the wired network to do work, check email, and ...
19
votes
2answers
18k views

Simulating a low-bandwidth, high-latency network connection on Linux

I'd like to simulate a high-latency, low-bandwidth network connection on my Linux machine. Limiting bandwidth has been discussed before, e.g. here, but I can't find any posts which address limiting ...
23
votes
5answers
62k views

Force programs that do not specify proxy settings to use a proxy (ie: Steam)

My school requires a proxy for all internet access. If you want to use the internet, it is impossible to not use a proxy. This makes it a problem for many programs that don't seem to let you enter ...
30
votes
5answers
75k views

How do I set the priority of network connections in Ubuntu?

If a Ubuntu 11.04 machine is connected to WiFi and 3G simultaneously, how do I set the priority to let the applications (browser etc.) to use WiFi first? If that's not available, it should use the 3G....
17
votes
6answers
305k views

Windows 7 shows red “X” on network icon, but I'm connected

In Windows 7, after a few weeks of running Hamachi VPN, the internet icon in the system tray shows a red "X", indicating I have no network connection: This is false, as I am not only connected to two ...
19
votes
3answers
49k views

How to give preference over one network connection over another?

Like most laptops, it has both ethernet and wireless networking options. Likewise, I have a wireless router with 10/100/1000 Mbs. 90% of the time, wireless speeds suffice. But once in a while, I ...
12
votes
5answers
36k views

Using two wireless NICs at the same time on Windows 10 desktop PC

I have read similar questions in the past (i.e. How do I use my dual band Wi-Fi card to connect to 5GHz and 2.4GHz simultaneously on Windows? and Connect multiple WiFi networks simultaneously), ...
12
votes
8answers
59k views

How do I change the MAC address of my network card?

I have a local network in a Windows system where the Admin gives permission to the PCs by their MAC address. But he is on vacations and I have a new PC. How can I change the MAC address of my new PC ...
2
votes
6answers
7k views

Port Forwarding not working in DSL Router

I am using BSNL BroadBand connection and a DSL Router is provided that can act as a Default Gateway to many wireless devices. One such device is my server. I have bought a static ip on lease. So that ...
13
votes
3answers
206k views

How do I reinstall the TCP/IP protocol driver on Windows 7?

How do I reinstall the TCP/IP protocol driver on Windows 7?
4
votes
1answer
4k views

Changing routing on Mac with two Ethernet ports

I have a Mac tower which has two Ethernet ports. One is connected to our corporate network, the other to a non-corporate network. Priority order states that the non-corporate network comes first and ...
5
votes
4answers
57k views

Connect to two LAN networks with a single card

I'm connected to a LAN with the aid of DHCP. Now and then, I need to reach a laptop someone brings to the office that's not configured to use DHCP. So far I need to do the following: Connect laptop ...
15
votes
2answers
13k views

How does the router know which device to send packets to? [duplicate]

my question does not concern how it moves through the internet, but how it moves through the router to a certain device. All devices connected to a router in a home network have the same external IP. ...
2
votes
1answer
2k views

Connecting to my own network via external IP

Even though I have seen and read quite a few similar Q's I was still unable to understand what is required for me to be able to do this. I have an internal network. One of the machines is a web ...