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

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9 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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5 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
19 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
11 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
11 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
20 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
16 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
16 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
15 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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0answers
4 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 ...
2
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1answer
8 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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0answers
10 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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0answers
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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0answers
19 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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0answers
4 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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0answers
4 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
23 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
16 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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0answers
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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0answers
2 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
30 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
21 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
8 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
21 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
43 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 ...
2
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1answer
21 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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0answers
13 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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0answers
28 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
30 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 ...
2
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1answer
46 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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8 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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0answers
14 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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1answer
27 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
28 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
20 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 ...
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13 views

Does ssh client integrate with other systems?

I have MacBook Pro running OSX Yosemite, when I enable the ssh from (Preferences - > Sharing) it gives me link like this : members-12-13.hallsnetwork.xxxx.com Well, clearly the link is descriptive ...
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0answers
23 views

My router Belkin F5D7234-4 v5 blocking a certain website

In short: suddenly I couldn't access a certain website I was working on - it times out, the traceroute makes a few hops and then stops. It worked normally, and just started timing out one morning. If ...
1
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1answer
12 views

Cannot access DNS from external network

I have setup a MaraDNS instance on CentOS 6.5. I can access the DNS records from local machine—on which MaraDNS is installed—by doing nslookup but cannot access the DNS server records from Internet on ...
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0answers
18 views

HP Switches in a ring

Im struggling to find an answer to limitations of spanning tree in a ring network. We have a network covering a large area that is in a ring format, Each node is fibre in and out and possibly one ...
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0answers
10 views

How to connect remotely from Windows to a Vagrant instance?

Is there a way to connect from my windows pc to a vagrant instance running on my mac which is on the same network? Ideally I would like to use cygwin or something equivalent
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0answers
28 views

Are crossover ethernet cables not working anymore on modern ethernet cards?

I made a crossover cable to connect two computers. The connections are correct, and I verified the cable both visually and with a tester. However, no matter what I tried, I could not make it to work. ...
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2answers
17 views

Make local Virtual Box server available to other computers on the wider host OS LAN

I’m running VirtualBox on Windows 7, the guest virtual machine OS is Ubuntu Server and it’s set up in such a way that I can access it from the host machine on 192.168.56.101. The host machine IP in ...
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0answers
21 views

2012 Domain Controller DNS issues

I have built a 2012 domain controller and after i install the unit no one can get on the internet. The way I set it up is I was going to let the router continue to run the DHCP process and have the ...
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0answers
14 views

Traffic - Active Directory vs Remote Desktop Protocol [on hold]

I am sorry to ask this really basic question... What is causing more network traffic per client? A Windows Remote Desktop connection session or a Windows Active Directory Service session? What is ...
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1answer
15 views

IPv6 only works incoming and localy on FreeBSD 8.4

I am running FreeBSD 8.4 and have trouble with IPv6. I can connect to my server from outside, connect locally to my jails. But from the server I cannot connect to the outside world. When I ping6 to ...
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1answer
30 views

User posting from Google proxy IP? [on hold]

Background: A small forum that I run has had to ban quite a few persistent trolls and other annoying users over the years. Using a proxy is against the stated forum rules for this reason. We have ...
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2answers
22 views

Using multiple ethernet switches to connect shorter ethernet cable runs with a mix of cat5e and cat6

Ive got multiple shorter runs of ethernet cables a mixture of cat5e and cat6. I need to get a cable from the router to another area, there is no direct concealed cable but there are multiple shorter ...