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

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I can only connect to IPv6 websites

my problem is, that I can only connect to servers and their websites supporting IPv6 (such as google.com or facebook.com). On other sites, a ping request times out. Additional information: 1. My ...
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1answer
9 views

4 logically isolated networks anyway to setup 1 with access to all networks?

I just recently switched careers and entered the IT field. My new boss tasked me with finding out if it is possible with his current network setup, which is 4 logical networks isolated, to have 1 of ...
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3 views

Redirect external request thru VPN

I'm using Centos 5.4 and I'm trying to use the XMPP outside the company. But, the XMPP only works with the VPN. VPN connects and the XMPP become 10.0.2.49:5222 I tried to use iptables using this: ...
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2answers
18 views

Why mobile internet sticks have a microSD slot?

I just received a ZTE MF667 mobile Internet modem. It has two slots: one for the SIM card and one for a microSD card. Does the microSD card required? What is it used for? Is it required for the ...
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10 views

dhclient can't get ip address

I have two interfaces: eth0 and eth1. eth0 gets ip address upon bootup, but eth1 never gets ip address. Here's what I get with sudo dhclient eth1 Internet Systems Consortium DHCP Client 4.2.4 ...
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10 views

Various IPs unaccessible after connection to new WiFi

since I've connected to my parents' wireless network, there are several programs that stopped working on any network connection (even mine, even though they used to work on that before). Examples are: ...
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0answers
18 views

Linux message: Possible SYN flooding on port 25. Sending cookies

I have a Linux CentOS server online. At my console this message appeared: possible possible SYN flooding on port 25. Sending cookies. See SYN flood and SYN cookies. I have done an Apache JMeter ...
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1answer
13 views

Windows 8.1- Hyper-V won't network with Ubuntu 14.04 VM

Well, I'm officially out of patience for this sort of thing, and it's 12:23 AM. I'm trying to run Ubuntu 14.04 with Hyper-V on a Lenovo Yoga 2 Pro running Windows 8.1. I cannot get the virtual ...
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1answer
28 views

How to get the bandwidth usages in my WIFI including from mobile devices

I have set up a wireless network(Binatone router) for my home.I have 3 laptop usages and two mobile usages,out which which one is iphone and other is android.I want to know how much bandwidth each and ...
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2answers
765 views

How do I check the internet usage of a particular device in my room?

I am living with 5 other people and most of our network is consumed in 20 days so we have to spend almost 10-11 days without Internet. I just wish to know what are the ways to monitor the internet ...
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10 views

How to share windows folders with only specific interfaces

Not enough point to keep on commenting on this question where someone asked how to share a windows folder over a particular network interface and the answer was to disable sharing on the other ...
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0answers
22 views

How to get Alfa awus036nha to work with Kali Linux?

Im running Kali linux 64bit 1.07 as a guest os through virtualbox 4.3.12 r93733. Ive also installed the VirtualBox 4.3.12 Oracle VM VirtualBox Extension Pack. I have bridged my hosts network ...
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1answer
15 views

Can't resolve DNS or Ping outside the firewall but can remote in via SSLVPN

I don't understand why or how this can happen. We use 2 separate LAN's, 1 for computers and servers, the other for VOIP phones. They are not connected in any way. They are connected to the same ...
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2answers
37 views

RedHat Linux - ssh shows “connection refused” using one user and also root, but another user can connect

From server Y, user A tries to ssh to server X and gets Connection Refused. From server Y, user B tries to ssh to server X and is allowed through. From server Y, root tries to ssh and gets Connection ...
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0answers
22 views

How to repair Windows 8.1 generic network drivers?

It's very strange problem: after loading from Arch Linux LiveCD, when returned back to Win8.1, I tried to connect via VPN PPTP to Internet, as I always do, but it hanged for a while, and no connection ...
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1answer
62 views

Understanding my router IPv6

I got my new Internet contract today. This is the first time I use this router and deal with IPv6. I want to host a local website on a home server. I went to the configuration page of the router and I ...
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1answer
35 views

Can a people DDOS a block Port?

The title says it all, I've search around the net but no avail. From what I understand, DDoS is a distributed denial of service attack, where multiple people sent a huge request at a same time which ...
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0answers
9 views

What is the smallest size address block that can support the servers and routers in the perimeter network?

You are working as a network administrator for a company with 100 employees. Your company currently uses total of six public IP addresses for public routers and servers, all of which are hosted in a ...
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1answer
33 views

My router has only IPv6 and I need to host websites

I have never dealt with IPv6. Today I got my internet installed from an internet company and they brought the router. When I accessed the router to see its public ip address, I found that there is ...
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3answers
28 views

Can't access my computer with its public ip

I installed MAMP on my Macbook Pro. It opens on 'localhost:8888'. I went to http://www.whatismyip.com/ and it gave me my ipv4 address. I copied my ip and put it on my browser like this: myip:8888 and ...
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1answer
20 views

Can't connect to specific FTP?

Have a bit of an issue and I'm pretty confused by this one. Yesterday I was connecting to my FTP all day and it seemed to be fine but now I'm having issues. I use a VPN and I'm not sure how that ...
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24 views

Windows 7 dns resolve problems (mostly cmd)

More about the situation: I have my dns set to 8.8.8.8 and 8.8.4.4 so these are probably fine communicator (skype/facebook chat) and all four web browsers in my system have no problem with dns ...
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23 views

ssh works on IP get “ssh_exchange_identification: Connection closed by remote host” on FQDN

I have a new raspberry pi box running at my home. I decided that I will use it to access it by ssh from the web. I setup the NAT in the Router and everything else, from my Mac Book within the internal ...
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2answers
33 views

How (exactly) does a DoS attack work?

Excuse the neophyte networking question - being a quite competent sysadmin, I never really figured out the networking side. How exactly do ICMP flood (D)DoS attacks work? I couldn't find much ...
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2answers
22 views

What happens if I change the DNS of system

I am using internet using Huawei USB Data Card. It has an option of Mobile broadband. and when I connect through mobile broadband I noticed that I can Change the IPv4 DNS address. What will happen if ...
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0answers
10 views

dhclient not working for

I tried to get a IP address for eth0 via dhclient, but it hangs forever. Please help me find out what's wrong. I am running it inside a virutalbox guest machine. There're two interfaces, eth0 and ...
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1answer
30 views

How to disable client computers internet connection?

Hi I'm using a windows server 2012 OS, My problem is how can i disable or prevent users to have internet connection? Is this available in group policy object?
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0answers
22 views

Can't access Apache outside LAN

I have been trying to set up apache to use as a small personal web server, but I am running into a problem. I can access apache from inside the local network on port 8073 (my isp blocks port 80) and ...
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0answers
18 views

Port forwarding on a Huawei EchoLife HG8245

The problem is port forwarding in my EchoLife HG8245 router. I am able to port forward, and I know it works. But after some time I've came with the conclusion that my router only accepts 1 connection ...
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1answer
18 views

How to spoof the MAC on a wifi, Linux Mint 17, with NM?

I can't find a reliable way to spoof my mac. If I use the "clone MAC address" on network manager (I use Linux Mint 17, Cinnamon), I can't connect to my wifi. I tried everything, unless I remove the ...
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0answers
7 views

My router is having trouble with Windows 8 devices

I have a TP-LINK Wireless N Router WR941ND and several devices (2 notebooks and 1 cellphone). The cellphone is a Windows Phone and the computers are a Acer running Windows 7 Pro and a Dell Vostro V14T ...
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10 views

10 Gb NIC autoneg off?

I have fancy mellanox 10Gb NIC but somehow I can see frameerrors whenever I am stressing the hadoop cluster. Our network guy told me the switch has been hard coded as full duplex and autonegotiate, ...
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9 views

What is difference between homeusers group and users group?

What is difference between homeusers group and users group? I want to know the property of homeusers group. and I want to know the property of users group?
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1answer
22 views

Slow LAN connection on one machine but not another

I am using the same ethernet cable on two different machines and getting two incredibly different results. The following tests were done on a Windows 7 desktop and a Linux laptop. On my laptop, ...
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1answer
11 views

Software to provide loopback at remote endpoint, and client software to test performance

NOTE: I'm not looking at using the lo loopback network interface. We're developing an embedded device that has its own internal Ethernet network, and a second network that is exposed to the outside ...
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1answer
14 views

Bad universal repeater and access point configuration

my friend have problem with bad internet connections. The problem is that he have Access Point and Universal Repeater and they are bad(old). They use B+G standard but connection is bad and unstable. ...
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0answers
11 views

Access Apache22 server installed on guestOS(FreeBSD) from Host(Win7)

I would like to access my freshly installed apache server on my FreeBSD guestOS from Windows 7. So I set my virtual network on VMWare to bridged, I edited the hosts file on my Windows, I opened a ...
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1answer
19 views

Prevent Users from accessing certain IP ranges when Teamviewer is active

I asked this question on Network Engineering, but determined that possibly using a script or software might be the better solution. I have a network with multiple VLANs and subnets that get routed to ...
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0answers
9 views

Cant use host-only adapter and bridged adapter at the same time virtual-box

I want to create a virtual network that real devices can connect to using virtual box. I have 2 routers I am bridging to virtual firmware. I have servers also running on vm's and would like to be able ...
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0answers
14 views

Automation of control panel > Wireless Network settings(802.11 modes) through Powershell or any other automated procedures

I want to automate the "Control Panel\Network and Internet\Manage Wireless Networks" page in Windows through Powershell or any other automated procedures, to change my wireless adapter's mode to all ...
1
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1answer
25 views

Joining client to Server in VirtualBox

Having installed the trial of Server 2012 and a copy of Win 7 Pro in VirtualBox, I now need to join them together so the client can be in the domain of the server. I need to deactivate dhcp within ...
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0answers
29 views

sftp scp can not work , result in network down

root@6-2:/root> scp 1.pcap yqiu@10.xx.xx.xx:~ yqiu@10.xx.xx.xx's password: 1.pcap 0% 0 0.0KB/s --:-- ETA I use scp to ...
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0answers
9 views

VISP and Peer connections

I just want some help regarding questions that came to my mind while googling for how to become an ISP. Most of the literature talks about buying a wholesale solution, VISP, and make a peer ...
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1answer
22 views

“Bad Password” Message in WICD-Curses

I've been trying to use WICD-curses to connect to my Wi-Fi network. I thought it would be simple: I went to the config page for my network, entered the password at the bottom, hit F10, and waited for ...
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0answers
12 views

connect to network and netsh tend to lag indefinitely

Questions Why are netsh and "connect to a network" lagging indefinitely? How can I repair this? Possible workaround: can I configure Windows 7 to connect to a named network automatically without ...
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0answers
13 views

Capture data leaving Application Layer of TCP stack programmatically [on hold]

Is there any way to capture data after it leaves Application Layer but before Transport layer in TCP/IP stack programmatically?
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0answers
9 views

Engenius ENS202EXT multiple AP on campus Channel conflict?

I have 10 of these AP around campus, all about 75-200 ft apart from one to the other. I have had them set up on auto channel since I have had them but two of them have a couple issues. One of them ...
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2answers
30 views

Network Sniffer identifying strange requests to *.crdui.com

So I just downloaded a Network Sniffer on my local machine, as I think something is going on. As soon as I opened it, selected my network adapter (an LTE stick), it started showing me requests from ...
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1answer
32 views

Computer keeps disconnecting/connecting [on hold]

What can be the issue? internet access keeps disconnecting and reconnecting every few seconds? I updated the Intel gigabyte network adapter.
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0answers
7 views

Programming the firewall on a Siemens router

I have a Siemens ADSL SL2-141 router. From the web interface, I can program the firewall (e.g. block/unblock IP addresses). I want to do the same programmatically via telnet. But, when I ask for ...