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

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59 views

netperf udp with small packets on 10g link is bounded by ksoftirqd

I want to fill a 10Gbps link with very small udp packets (64B). I use the following command for i in 1 2 3 4 5 6 7 8; do netperf -H 192.168.56.2 -p 12865 -t UDP_STREAM -l 60 -C -c -- -m 64 -s 16M ...
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31 views

Adding a static route for gmail?

I have my PC (windows7) on two networks - WiFi Hotspot and LAN at the same time. I would like to add a route on my PC such that requests to gmail go to the Wifi Hotspot and everything else to LAN ...
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54 views

Batch check if IP is within specific range

I'm trying to make a batch script to get local IP-address of active NIC (could be wireless or local). To get IP adress I have used following line: FOR /F "delims=[] tokens=2" %%a in ('ping -4 ...
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58 views

Extremely slow connection on LAN for Readynas NV+ v2 NAS

I am experiencing extremely slow upload rates on a Readynas NV+v2 NAS. Speed measurement When testing using speedtest-cli I get the following result: Testing download ...
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53 views

Dynamic Routes at Home Router

I am currently using a linux box as my home router (PPPoE to my ISP and NAT, etc). Some websites are blocked in my country (don't say the name out loud), so I have another PPP in my router to a VPN ...
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14 views

How can I limit connections from any IPs but localhost using xinetd?

There is a xinetd service. Users connect to it from their workstations. How can I limit them to use only one connection per IP, but keep unlimited connections from localhost? I know there is ...
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19 views

DNSSEC- Client software

I'm interested in running DNSSEC, not sure how this works. Does DNSSEC need to be supported both on the client and server. I currently have DNSSEC on my domain hosting site and the VPS server but if ...
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101 views

Microsoft Virtual Wi-Fi Hosted Network

I have a computed connected to the internet via a wired connection, and it has a Wi-Fi adapter. I want to turn that into a hotspot so I can connect my cellphone / netbook to the internet through it. ...
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43 views

Create bridge (eth0-wlan0) using my laptop

Okay. I might be asking this again but none of the answers solved my problem. I have a PC A which has eth0 (192.168.1.28/24) connected to another machine B's eth1 (192.168.1.11/24). A has another ...
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138 views

How can I enable the wireless access in Lenovo?

In a Lenovo G585 with Windows 8 installed I can not connect to WIFI networks. I see that there is no button to turn on the WIFI. After googling I found that Lenovo's don't offer such a button and I ...
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18 views

Win 8: Folder copies to network drive, but the files in it don't copy

I can transfer files between my network drive and my Win 8 computer, but if I drag a folder from my computer to the drive, the folder is empty on the Network drive. My XP computer can do this ...
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117 views

VS2013 & TFS2012: Cannot create Team Project from outside of LAN (TF400324)

VS is 2013 Update 2. TFS Version is 12.0.21005.1 (Tfs2013.RTM), might it need an update? If not here goes: Creating Team Projects from inside my Home Network, where the Server with TFS2012 is located ...
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86 views

Accessing Servers without Port Forwarding

So I'm stuck in a conundrum. I can't buy a server, and I'm stuck with this ISP who refuses to give me a new router. They have given me a ZTE Router (ISP is Cincinnati Bell FiOptics (great speeds ...
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13 views

pppd retry issue with multiple wan interfaces

I am using two wan connections in my router with linux kernel 2.6.21. PPPOE Ethernet cable and 3G connection. Both need ppp setup. But boot sequence is different for both. many times 3G disconnect and ...
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209 views

TP-Link router (TD-W8951ND) super high ping

I'm using the router mentioned in the title and I'm having a connection issue: from time to time my connection starts lagging very hard and becomes basically unusable. I'm connected through wi-fi. ...
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37 views

Two networks with same SSID, different credentials

(Laptop running W7.) We have a wireless network all around the campus with SSID X, which requires credentials Y. The same wireless network exists in my faculty (at least the SSID is the same), where ...
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105 views

Modem and router suddenly won't work. When modem is plugged into router, modem's LAN LED won't light up

I have a D-link DIR-600 router and a TP-Link TD-8816 (ver 6.0) modem. I had them configured to modem on bridge and router on PPPoE for a long time, they worked fine. Today I woke up to no internet ...
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43 views

Is there a universal network driver for all motherboard?

I have an Ecs geforce6100pm-m2 v.30 motherboard which I bought 2nd hand. The vendor did not provide drivers as he said it was plug and play. I still downloaded the drivers on the main website of Ecs ...
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166 views

Can't set up ad-hoc network (raspberry pi)

Question: How do I manually set my Cell Id? I have tried the following code sudo iwconfig wlan0 ap 02:12:34:56:78:9a but it randomly resets the Cell Id to a different value. I am trying to create a ...
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135 views

Signal King Mac Drivers

I've now accumulated two Wi-Fi antennas for the purpose of going on a neighbor's shared secure network. The first (an Ideaworks outdoor antenna) works ok (middling would be a kind descriptor to apply) ...
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34 views

Comcast Connection Suffers - No Explanation

I was hoping someone might have a clue as to what's causing my Internet problem, since Comcast is clueless, despite two visits from “technicians”. I am seeking some advice as to what I can tell ...
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22 views

Share local area connection with multiple TAPs

I'm setting up an VPN server. In this server I want to have 2 different encryptions (1024, 2048), each one in different ports. So I created 2 TAP adapters, and shared the local area connection with ...
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42 views

Internet connection dropped when nat created and routed via vpn [linux+iptables]

I've got a very frustrating network issue. Currently I'm living in a hotel in which I need to authenticate through a website in order to obtain internet access. I've also got xbox360 that I want to ...
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82 views

Can't ping over VPN from Virtual Machine in Azure

I've setup a VPN connection from Azure to my local network. I can ping an Azure machine from my local network, but cannot ping a local machine from my Azure network. I've got the firewall on my ...
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76 views

Interface can see ARP packets but can't see the ICMP echo requests

Moring SuperUsers, got my self into a pickle. I have to servers, os-net and vmhost3, connected together via a cross-over cable on their respective 10Gbps interfaces. Both servers are running Ubuntu ...
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85 views

OpenWRT sending invalid packets to WAN when Android phone connects

I have a Netgear WR703N wireless router flashed with OpenWRT 12.09 "Attitude Adjustment" connected to my school's Ethernet network, and our IT department sent emails alerting me that it's ...
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41 views

In Windows, how do I avoid connecting to a Wi-Fi network through a specific AP?

In my house, I have a network set up like this: A wireless router connected to a cable modem, which is connected to the Internet. The wireless router broadcasts the Wi-Fi network NET1. My computer is ...
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224 views

Connection to router/modem works only if plugged in directly, not via switches/wifi

Consider the following setup: 2-3 Laptops and 4-5 Desktop PCs (both windows and linux systems) are connected to an ADSL modem/router (http://avm.de/produkte/fritzbox/fritzbox-3272/) via wireless and ...
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18 views

Windows 8.1 how to disable certain programs when pc is connected to certain networks?

I use my laptop in different environments. Most of the time I'm connected with unlimited wifi or ethernet, often I'm connected through tethering cellular 3G. Since I run Dropbox Bittorrent Sync and ...
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45 views

Can access public shares for ANONYMOUS user from Android device but not from windows 8

At our office we have multiple PCs (Win 8.1) and after enabling windows publics share and disabling password protected sharing we've noticed that the feature was enabled on some PCs but on some ...
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54 views

Block incoming traffic at home via static IP

I have a static IP to be whitelisted on a number of services I have to use from home. However this means that my home router is now accessible by the web, ftp etc. My routers firewall (ASUS DSL-G31) ...
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70 views

Unable to detect Wifi signals

Recently my old wifi adapter broke, so I had to buy a new one. Eventually I got around to it but it doesn't seem to work. I have bought one from TP-LINK, returned it for the same issue as I'm having ...
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75 views

Why does “sudo ifconfig eth0 down” followed by “sudo ifconfig eth0 up” stop dhcp?

I am playing around in Ubuntu 12.04 trying to learn about networking. I learned that you can delete a network interface by running sudo ifconfig name_of_network_interface down However, when I do ...
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22 views

How to prevent SafeConnect from repeatedly accessing disk

When I run Impulse Point's SafeConnect on a Mac then when I monitor filesystem activity with fswatch I notice that SafeConnect is repeatedly accessing ...
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35 views

How to set up a productive and flexible Linux cluster?

I have 7 old computers that are a few years old. I want to cluster them together to create a linux cluster that will run general purpose software(not cluster specific). Is there any software that can ...
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328 views

vagrant private_network with osx host/centos guest using virtualbox host-only networking

I cannot get host-only networking to work from host to guest or guest to host using e.g. ping, netcat or ssh. Sshing fails timing out. No packets are seen when starting wireshark on the host interface ...
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31 views

Analyzing the actions of a running program

Do you know a Windows software (or several) that can analyze what a running program is doing ? For example, detecting if the program is connecting to the Internet (and to what), of sending data via ...
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473 views

Ubuntu How to configure networking to support two NICs

ifconfig shows em1, lo, and p3p1 (not connected) when the interfaces file does not include p3p1 but when I do include p3p1 and restart only em1 and lo show up with ifconfig. What am I doing wrong? ...
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106 views

Weird IP in Linux Mint 17

I installed Linux Mint over a shared Ethernet connection from my laptop and installed my Broadcom Drivers over that shared ethernet connection, and I noticed that my Linux box is on the wrong gateway. ...
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26 views

Some applications slow on network (win 8.1), where to start?

I recently got a new computer with windows 8.1. I identified at least two applications are very slow when the are using the network. This is the MS dynamics AX client (very slow all the time) and ...
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49 views

Strange Local DNS issue involving Comcast, not a Comcast User

I have a network with 3 desktops (2 x Win7 x64, 1 x Win7 x32) connected via ethernet and 1 laptop (Win7 x64) connected via wireless most of the time using a Linksys WRT54GS. I have a desktop ...
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68 views

Can't access HTTPS resources with Ubuntu client and VirtualBox Windows host

I have VirtualBox 4.3.12 on Windows 8.1 running Ubuntu Trusty 32bit client. When I try to access HTTPS resources from the client, I see errors like: Cannot fetch index base URL ...
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183 views

Windows 7 wont connect to shared folders

I'm going to quote something right from the beginning, this does not work: To configure NTLM compatibility for Windows Vista or Windows 7 1 Click Start > All Programs > Accessories > Run and ...
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16 views

Working around Active Directory's dynamic port range

I have a need to authenticate users against Active Directory (which uses dynamic ports), but the networking group within the organization will not allow us to open up such a large range of ports. I ...
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13 views

Sporadic loss of access to local server

For some reason, I lose access to a local server called lux-app04 seemingly at random, but only in some applications. As you can see in the image below, Postman (top) can connect to it, but curl ...
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76 views

Site to Site VPN - Openswan and CISCO A2A

Below is the diagram that the VPN connection between Openswan server and CISCO A2A. client A and B are remote hosts with static ips. client X and Y are behind the Cisco firewall. I can see ...
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62 views

QoS and other way to optimize speed on network

I have some weird network issues. I'm running on 2 VM's email verifications and my whole network becomes laggy and loosely from it. It shouldn't use high bandwidth its more like sending a lots of ...
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89 views

How to share internet from one computer to another via router?

I want to share USB-modem internet from one laptop to another by the following way: The main problem is how to configure the first (white) laptop as a gateway on the router. When I try to set the ...
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189 views

Send messages using Command Prompt knowing IP address in LAN

My laptop is connected to College LAN and It has windows 7 Ultimate. I want to send message to my friend using IP address (using command prompt) without any external application. How can I send ...
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58 views

Multiple IIS server share same domain and port?

I have the following network/server setup: Since this is for a startup I'm working on with a friend using the resources we have, we use a DD-WRT router to redirect port 80 requests to a specific ...