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

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Internet Connection Extremely Poor but no issues with the ISP

I have a broadband Internet connection from EE in the UK (formerly Orange) and the connection is 17 Mbps. But since last week, I am constantly getting 0.7 Mbps. My housemate gets around 11-12 Mbps ...
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10 views

Testing a Firewall against outgoing UDP ports

I'm trying to test which outgoing ports are allowed through a firewall. At the moment I can do this for TCP by port scanning portquiz.net (which is a server with all TCP ports open) from inside ...
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3 views

Forwarding a TeamSpeak instance

I’m trying to setup up a TeamSpeak3 server using my IPv6-enabled home connection (native IPv4 in LAN, internet IPv4 via CGN). Let the server run on machine tsbox.net1.mydomain, ports 1234/UDP4 ...
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6 views

Curl shows redirection to localhost

I am using an iMac (27-inch, Late 2013) running Yosemite 10.10.2 (14C109). Recently I ran a curl command and it appears as though there is a local proxy or server running on my computer. Here is the ...
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4 views

Internet Sharing Via Wireless Pci Adapter

my internet source is tplink wireless pci card and i want to share it via wireless g router(zyxel gateway router model:P-660hw-t1 v2)
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15 views

WiFi Transmit Rate Fluctuates

I'm trying to figure this one out and I'm a bit confused. We've got a WiFi access point in a specific room in the office where we have about 3-4 people working and we'll see a large fluctuation in the ...
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16 views

Sharing between 5GHz and 2.4GHz on same network

I just got an access point by EnGenius (ESR1750) which is dual-band. At my office, we use IP Messenger to share files. Most of the devices are Mac Minis but there are a few Windows PCs as well. The ...
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16 views

Safari doesn't use the proxy in network configuration on Mac OS X. What should I check?

I set the HTTP and HTTPS proxy in network configuration on Mac OS X. After that, I start Safari but it still doesn't use the proxy server. How can I make Safari use the proxy?
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1answer
18 views

Full reset of network interface

I have a Raspberry Pi. If it's connected to a network, and cables are changed, IP numbers changed, and what not, it sometimes stops working. A simple reboot solves the problem. Is there any way of ...
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9 views

Not able to log in to Amazon EC2 server from Eclipse using my private SSH key file.ppk

I am trying to connect an Amazon EC2 instance using private key file from my Eclipse program but have been unable to do so till now. I am able to connect to the server through Putty but it’s not ...
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1answer
27 views

Use wired LAN network interface for Teamviewer and Wi-Fi interface for everything else

I need to make TeamViewer use my wired network card and web browsing traffic to use my Wi-Fi network card. I am using Windows XP. How can I make this happen? If the scenario above would not be ...
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15 views

Why is my modem/router not detecting my wireless access point?

I have a Zyxel WAP3205 v1 wireless access point. Under my previous Internet provider, my modem acted as a DHCP server and was able to detect and assign the default network address to the WAP allowing ...
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17 views

Wireless adapter missing

I have a HP ProBook 4520s laptop with Windows 7 Ultimate 64-bit and a Ralink RT3090 802.11b/g/n wireless. The last few days, I started noticing that I was getting weaker Wi-Fi connections, but this ...
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8 views

Extend wifi range from Mac Pro with Airport Extreme

I am trying to extend an office wifi, called "NetworkA" to my desk area. The signal comes from a Mac Pro (which is hard wired to our network) that has internet sharing enabled. I have an "AirPort ...
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1answer
32 views

How does the network troubleshooting in Windows work?

If you right click the network icon in the notification area (windows 7 + 8) you have the option to "Troubleshoot Problems". This often results in actions like "resetting" (already the first not well ...
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1answer
17 views

“Must install and enable a network adapter card”

I was going into my network settings to change the DNS for my ethernet when I noticed an error that I've not seen before: I don't understand what this mean, because my adapter is enabled... which is ...
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2answers
18 views

coming out of standby, no internet for 5 minutes

I am having this incredibly frustrating bug with my Windows 8.1 laptop when coming out of standby. I get no internet connectivity at all for at least 5 minutes. During that time, my network icon in ...
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1answer
24 views

Server external acess security

I’m setting up my own home Raspberry Pi server/NAS and I’m looking to be able to access outside the home network. This has however prompted me to rethink the whole setup. I have an external HDD ...
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1answer
21 views

Get current network speed in bash

Is there a method to get the current network speed (just like I can get with «nload») in a bash script? I would just put into a variable the speed at the moment where script is running. Ex: ...
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1answer
19 views

What ports do I need to open for offshore to access our SQL Server db?

When using SSMS, for example, for connect to a SQL Server, I would specify the server name to which a wanted to connect as well as the Authentication method, in this case, Windows Authentication. If ...
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1answer
16 views

multi-master databases in low connectivity environments

I'm working on a project that has many client devices distributed in remote environments where connectivity losses are frequent and expected. Clients continue to operate when offline, but when these ...
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1answer
10 views

How can a reverse proxy be specified in windows?

End goal: Intercept HTTP request destined for xyz.com, reply with static precomputed response. I have used mitmproxy before in reverse mode to accomplish this using a web browser but my goal is to ...
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1answer
23 views

How can I protect my subnet?

I recently moved to a new place, and the landlord provides our network via an ethernet connection that I connect my own router to. I can't see or ping anything back up the network, but I want to make ...
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11 views

Two program on different VMs experience reply timeouts unless pinging

I've encountered a very odd issue. I've got 2 VMs, each running an identical program (a pub/sub middleware). The programs have to communicate by sending an event from and to each other. The program ...
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3 views

UPnP Port Forwarding doesn't appear to forward my telnet port

I used upnpc to set up some forwarding rules for HTTP and TELNET (I'm aware of the security risk, it's a test): upnpc -a 192.168.0.30 23 23 TCP upnpc -a 192.168.0.30 80 80 TCP Everything looks OK ...
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6 views

Chrome on OS X: Any way to pause all network activity?

I'm trying to debug an app running in the iOS simulator, and I'm using mitmdump to capture the network traffic. iOS simulator doesn't let you set a proxy directly, so I have to set my whole Mac to ...
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21 views

Do not fragment bit and windows 7

Recently had an issue where the DF bit was set to 1 going from a W7 workstation to the update server, the issue is it was sending 32K of data when the MTU was set to 1500. When the packet hits the NIC ...
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7 views

Connecting two (or more) virtual machines in VirtualBox via bridging rather than using the internal network

One method I tried was using a host-only network for one of the machines, and then a bridged network on the other. However VirtualBox doesn't list the host-only adapter in my windows host as an option ...
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5 views

IIS URL-rewrite doesn't work

I have an IIS setup with redirect rules that work perfectly fine on my Windows machine. However - I'm starting to use Mac - so I installed a VirtualBox VM with windows on it and used the exact same ...
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2answers
32 views

Connecting bluetooth headset kills wifi internet on laptop PC

I just bought Genius HS-920BT BT headset. I've paired it to my PC on Windows 7. However, when I turned on the "Forward Voip calls to Handsfree" service, in order to use it as my Skype communications ...
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1answer
26 views

Tool to group a list of IP addresses into IP ranges

I look after a website that is currently being flooded with HTTP requests from different IP addresses but all using the same user agent string I've grepped the log file and now have a file with all ...
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1answer
18 views

Win 7 - “unidentified network” / “virtualbox-host-only network”

I somewhat strangely cannot connect my computer (Win7) to the internet anymore because it is "currently connected" to an "unidentified network". Network Center says I'm on the "VirtualBox Host-Only ...
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11 views

Additional logon information required

I am connecting to a wireless network in a company and as the title says, I am getting the message that I have to log in to the network. To do that I usually just open a random webpage and I am ...
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4 views

Virtualbox internet through browser login issue

I'm working on a Windows host machine that has internet through an Ethernet cable after which I need to do a login through a webportal (it's Kotnet). Previously, when working with a bunch of Linux ...
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1answer
32 views

What does the output of 'ss -s' mean?

I have a problem understanding the output of the Linux ss (socket statistics) command. I can not understand the meaning of the output of ss -s For example: [root@dls2304-1 ~]# ss -s Total: 973 ...
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1answer
23 views

replacement for Net Send

Is there any replacement for Net Send, I believe it was called, we can implement for our 60+ computers at work? We would like the ability to : 1) send messages to all logged on users and 2) send ...
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1answer
10 views

MaraDNS- Unable to forward DNS queries

I tried forwarding DNS queries to Google DNS but it is not working. Below is the content of my /etc/mararc file: csv2 = {} csv2["example.net."] = "db.example.net" csv2["google.com."] = ...
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1answer
24 views

How to use UDP hole punching for a SSH tunnel / session

I want to deploy a Raspberry Pi in my weekend cottage. The Raspberry Pi is there to log the temperatures and send them to a remote server which has a fixed ip, saves the data and displays it on a ...
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1answer
46 views

how does ping -W work

I want to try to use ping to detect if a server goes down. So the idea was to have something ping forever, and then if ping ever timed out( -W flag) it would return and I'd be able to detect it. But ...
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1answer
26 views

How to make server power settings apply even when computer is activated by WOL

I have a computer with 9 hdds as a storage server in the next room for me and my family (movies and such) connected to the router. The computer is without keyboard and monitor, all works fine, but in ...
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15 views

Dns server for specific domain

Is there a way to define a dns server for a specific domain? I'm setting up a develop machine with an amp stack and i want to redirect all urls with a specific domain (i.e. project.dev) to 127.0.0.1. ...
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30 views

Get Windows 7 to ipconfig renew automatically when an invalid IP configuration is ever detected

My new computer has a problem that causes its IP address to randomly become invalid. This problem is widely reported and no one ever fixes it. Is there any way to set up Windows 7 to aggressively ...
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2answers
31 views

How do routers avoid port clashes when DMZ and NAT are used?

NAT in consumer routers makes the router translate a request from an internal device on a private IP (say dev0) and a specific source port X to a request from it's own public IP at a different source ...
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1answer
47 views

Network Security - Potential issue [on hold]

I have to send a program over to China which accesses a server inside our network. This program updates SQL records and stores large amounts of data on the status of products beings tested, on this ...
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1answer
14 views

ISDN: Usb Modem Windows XP

So I have a D-LINK Windows XP ISDN Modem which I have to use to contact our telephone service in the building. I'd love it to run under Windows 7 or 8 but it doesn't. However the USB-modem is ...
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9 views

Execute remote commands as admin (vmrun)

I am using vmrun.exe to execute commands from a master to my virtual machines. For instance, I would like to be able to change the IP address of my virtual machines (netsh.exe should be launched as ...
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15 views

ACL inter-vlan routing

I need to configure access control list on layer 3 switches for a some school's: Now the PC's from one classroom can access the PC's from the other classroom. How can I configure that they only can ...
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2answers
33 views

Using Windows FTP client behind strict firewall

There is a software that depends on Windows ftp.exe to transfer files. Problem is, the computer that runs it is behind a very strict firewall, it does not work with Active FTP. Windows FTP only works ...
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1answer
30 views

Send packet (frame) with different 'Sender's MAC'?

I was just studying the Network+ book where it explains the contents of a Frame using blocks to represent a set of bits. Moving onward, it states that the first 'block' is the Recipient's MAC address. ...
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1answer
21 views

How to set Linux network namespaces as a non-root user?

I set up a network namespace for a VPN so that not all the traffic goes over the VPN. It works fine when I type: sudo ip netns exec vpn firefox All the Firefox traffic is now going through the VPN ...