Networking is the art of connecting two or more devices together so that they can communicate with each other.

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Why does “curl” command work normally while “ping” not?

I find a strange phenomenon in my corporate network: I can execute curl google.com command successfully: [root@localhost ~]# curl google.com <HTML><HEAD><meta ...
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3answers
33 views

Why can't the guest of VirtualBox connect to network?

I have installed CentOS 7 on virtualbox, and network setting is NAT. The guest can't connect to network: systemctl -l status network output likes this: ip addr output likes this: Could anyone ...
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2answers
25 views

ERR_CONNECTION_RESET when connecting to my RaspberryPi via External IP

I am trying to set up a web server on my raspberry pi. I can connect to it inside my current network by using my raspberry pi's ip address, but when using the port forward (my routers ip adress:port), ...
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1answer
29 views

How can I assign an external static IP to my machine?

I have recently moved ISP's and in this transition I acquired 4 static IP's. My plan was to move my 1U rack-mount server from the datacenter i use to my home as I do not need the redundancy, ...
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2answers
27 views

SSH fails to connect from Raspberry Pi to Mac laptop

I've got two machines on a local network, a Raspberry Pi running Raspbian wheezy, and a Macbook Air running OS X 10.8.5. I'm trying to set things up so I can ssh freely back and forth between the two ...
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1answer
2k views

Can't stream videos even though I have fast internet

For some reason, despite having an internet connection that should easily handle it, I seem to be unable to stream HD videos from beginning to end. Specifically, I usually attempt to stream videos ...
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1answer
21 views

I cannot connect to more than one internet connection in my windows 8.1

I have windows 8.1 installed on my PC. I have 3 wired broadband connections, but I cannot connect to two or more connections at a time. For example I want to use all three connections jointly to ...
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0answers
23 views

1 Network with 2 Gateways

I have a network which is connected to the internet. The range and subnet is 192.168.1.0/24. I also have an AP that is a Point-to-Point network which has the range and subnet of 172.18.53.12/30 I ...
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12 views
+50

Master browser msbrowse registration

On a SMB/CIFS network using NetBIOS over TCP, the group name \x01\x02__MSBROWSE__\x02\x01 is registered, which is the master browser for the subnet. If I have different domains/workgroups on my ...
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1answer
16 views

Why can't I connect to my local SQL Server Express (2014)?

After I installed Microsoft SQL Server Express (2014) on my local computer (for testing while building a web interface which uses databases), I could connect just fine, but for some random reason, now ...
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22 views

Wifi constantly disconnecting

I've been having problems with my WiFi over the last few weeks where my Internet would stop working even though it shows as connected. This is only happening on this laptop. Every other device in the ...
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2answers
3k views

Virtualbox: NAT networking suddenly stopped working for all Windows guests, Linux guests still OK

My host is an out-of-the-box Ubuntu 12.10 simply connected to Wifi. I installed VirtualBox, and then a few Linux and Windows 7 Pro guests on it, all with default VirtualBox options (NAT). I reboot ...
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0answers
6 views

Enable WAN Miniports

I need to enable (re-enable) one or more of my WAN miniports. After hours of research I can only find solutions to either a) hide or delete miniports or b) fix broken miniport drivers. I may indeed ...
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1answer
725 views

PXE Boot not working

Please explain the error in this screenshot: DHCP Setting: This screenshot was taken after powering off the old comp hence the server interface is shown as the wireless card - it becomes ...
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2answers
5k views

How to reset TCP/IP on Windows 8.1?

The following netsh command is not working on Windows 8.1. netsh int ipv4 reset It give “Access Denied” error and it is a VERY known issue, many people complaining about it all ove online forums. ...
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8 views

Debian upgrade from wheezy to jessie: Networking fails after short period

I've just upgraded my Debian system from wheezy to jessie. Almost everything works, but I lose the use of the network after a few minutes (no more than 5). I can get it back by doing a "service ...
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0answers
23 views

Arch Linux: My adapter resets every 5 or so minutes, for an unknown reason

I'm running an Arch Linux 64-bit VM using Oracle's VirtualBox. Everything is working fine, except my adapter keeps resetting every few minutes. I don't know what's causing this. I get a message ...
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1answer
31 views

Automatic Wireless Network Switching

I have a weird situation at work I'm trying to fix.... I work as a web developer at a large corporation with the usual over the top security on its networks. To be absolutely clear, I'm not trying ...
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0answers
9 views

Dual network interface default gate

I'm running Ubuntu 14.04 with dual NIC's. I'm seeing a problem where by one of the NIC's doesn't seem to want to use it's default gateway to route traffic. One NIC is operating with a Public IP ...
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0answers
132 views

Using wireless lans with vlans on dd-wrt

i'm using a Buffalo WHR-HP-G300N with DD-WRT v24-sp2 (12/22/14) std - build 25697 and want to setup three different WLans which are mapped to different VLans. The box itself only acts as acesspoint ...
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0answers
76 views

No outgoing traffic through passthrough network adapter (NIC ) on KVM guest

I have KVM host operated under CentOS 7 and guest with Windows 7 on it. Host NIC is passed to the guest as PCI device passthrough (not bridge, not NAT). Guest detects the NIC (drivers, cable plug, ...
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1answer
2k views

ubuntu server in a vm, can't connect to internet

I'm attemtping to host my own development web server in a virtual box guest, Ubuntu Server. I would like this virtual machine to be accessible from not only my home network, but outside the LAN as ...
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1answer
40 views

assign multiple ips to a network interface card so as to route some programs through a vpn in ubuntu

I have a home server with several programs with web interfaces running on it. I want to access all these web interfaces from outside my local network. I also have a program I want to go through a ...
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1answer
22 views

the nature of pxebooting

Got a question regarding pxe-booting into freebsd. Let's assume the following. Machine A = dhcpd/tftp/console server Machine B = no OS (about get one by PXE) After pxe-booting machine B, I expect ...
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6 views

Network problems, can't ping my mac

I run VMware Fusion 7.1.1 and an Ubuntu server 14.04 on my imac 10.10.3 for web development. I have a thunderbolt Promise connected to the mac and mounted this on my ubuntu using smb, everything ...
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1answer
525 views

Test PXE using VirtualBox

I have a Linux laptop running a PXE server. I run the PXE server on the wired port so I can connect computers to it directly. When the Ethernet port is connected I can use PXE to boot a VirtualBox ...
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0answers
10 views

Connect from A to C using B in the middle

What software can be used to do a connection: A <-> B <-> C Where: A is a windows pc. B is a windows pc on a remote desktop (with an static ip) C is another computer that expect connections ...
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0answers
8 views

Stop websites on apache webserver ( localhost ), to access internet

I am using Uniserver for php web development. Most of my work involves working on wordpress websites. Wordpress core files and some css / js files ( e.g. cdn js or google fonts ) require internet ...
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0answers
6 views

Need all local traffic through Debian - Routing?

Been dealing with this for some hours now and my head are really spinning. So I got this cable network router (192.168.0.1) that Im trying to pass all my local traffic to. But I cannot for the life ...
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4answers
3k views

How to skip pushing the default gateway via DHCP in OpenWRT?

I have a router with OpenWRT that I want to resolve IP addressing with DHCP without setting a default gateway. I have added a DHCP-Option parameter with value 3,0.0.0.0 that is supposed to set the ...
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1answer
260 views

DNSCrypt not working - server certificate possibly expired

I have been using DNSCrypt for a few days (used this guide to install dominustemporis.com/2014/05/dnscrypt-on-windows-update/) and it has been working fine for a few days. Today I switched on my ...
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0answers
14 views

DNS Issue in ubuntu 14.04

I am facing DNS resolving issue sometimes in my Ubuntu 14.04.2 LTS trusty. I have configured my system with network manager to work with static IP assignment. I have also tried by changing DNS server ...
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2answers
4k views

How to find out total NIC cards and total available physical ports in linux

I need to find out how many total physical ports my server has, and how many of them are in use and how many free. Can you kindly help how to find it: This is what i find from dmidecode output: ...
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1answer
30 views

Does wpa_gui need wpa_supplicant to initialize first to work properly?

I am using Linux on a custom board based on the Freescale MCIMX6Q-SDB (armv71). I installed wpa_gui, a GUI for wpa_supplicant, on the custom board. I'd like to know if I have to initialize ...
0
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1answer
23 views

Virtual Box Bridged network failed to get IP (DHCP) No DHCPOFFERS received

I am newbie in networking and virtual box configuration, I have spent several days dealing with this problem. My goal is to get Bridged network working. When I try to UP interface in my Virtual Box ...
3
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1answer
42 views

DNS not functioning on command line

I recently did a combination of Vagrant + VirtualBox stuff on my machine to try to get a virtualized Ubuntu install working. However, I had no luck with it so I just uninstalled everything. Ever since ...
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0answers
6 views

Networked user cannot user local printer

I have a user on our network has a purchased a Dymo label printer. I am able to install the software that runs the printer; install the printer which is then visible in device manager. When I ...
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1answer
32 views

Possible network loop with WiFi and Ethernet when docked

I have been seeing a weird problem that I can't reproduce on demand and have a suspicion on the root cause. The Issue: Intermittently the entire network goes down until I walk around and unplug ...
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1answer
23 views

Cannot add, remove nor access mapped share “Element not found” in Windows 8.1

A standard user on my Windows 8.1-64 cannot remove a mapped drive. Tried command line and explorer. Tried run as admin. "Element not found" everywhere. C:\Windows\system32>net use x: /delete The ...
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0answers
17 views

Why ssh -R allows port '0' but ssh -L needs a port number?

Why with ssh -R is possible to allocate a free port by specifying '0' while with ssh -L you need to specify a valid free port? I want ssh to use a local free port to FWD remote traffic without ...
0
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0answers
11 views

radius authentication os x server and client certificate

I configured a Mac mini with OS X v10.10 and OS X Server, and an AirPort Extreme. The Wi-Fi network is WPA2 Enterprise, and the server provides RADIUS authentication service. I want the client ...
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0answers
15 views

RouterBoard ether 1-ether10 Configuration [on hold]

Sir, i want you guys to help me configure Router-board 1200 series.how to configure ether1-10. each as to segment bandwidth on each. thanks!
7
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1answer
112 views

How can my VPN connection be faster than my standard connection?

Yesterday I got a VPS as a dedicated machine for OpenVPN, I set it up and ran a speed test today, what I saw astonished me: With VPN: Without VPN: The VPN is situated in another country, on a ...
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0answers
14 views

NetDMA (and Direct Cache Access?) have been removed from Windows 8 / Server 2012. Why?

The MSDN page on Direct Cache Access (DCA), which is part of NetDMA, states The NetDMA interface is not supported in Windows 8 and later. So I guess both NetDMA and DCA are gone. As both seemed ...
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2answers
7 views

DNS problems with a static IP configuration in a VM

I am using Parallels Desktop 10.2 for Mac on OS X Yosemite. I am trying to configure my my client (Ubuntu 14.04) to host a website that is available to the host via a particular domain name. In the ...
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2answers
77 views

Moved to the 5 GHz band but my old devices don't see it

With the 2.4 GHz band totally cluttered and delivering worst speeds, I went ahead and bought a (5 GHz) dual band router. But the problem is that my older devices like a Vizio TV and an Android TV box ...
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2answers
6k views

Windows can't communicate with the device or resource (primary DNS server)

I am using Windows 7 Home Premium and am connecting to the Internet through Homeplug. When I connect and enable the LAN the status shows that I'm connected (the IPv4 shows connected), but after like ...
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5answers
52k views

Windows command to display all IP addresses

I know there is a single line of a command and its arguments that can help display all computer IP addresses (those that are being used) on a LAN, and my computer is also a client, as one of those ...
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8answers
1k views

Is it possible to merge my ISP and cellphone Internet access? I want to split download and upload [duplicate]

I would like to use my ISP for download only, and my cellphones 4G connection for upload only. This is because my ISP's upload speed is poor, but download is OK, and my 4G upload is great and free (I ...
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1answer
203 views

Why can't I access internet via my router?

I have a Linksys E3000 router that I'm trying to set up. I've connected the cable from my ISP to the Internet port of the router, and accessed its GUI via the wireless connection (had no other cable). ...