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

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What is the best way to limit the IP addresses which can be access from within a docker container?

I have an answer which will limit docker containers to only be able to access a single IP address outside the host. Using this iptables rule on the host: iptables -I FORWARD -i docker0 ! -d 8.8.8.8 ...
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6 views

How can I use OSX to share an internet connection WITHOUT being a DHCP server?

I have a small network of single-board linux computers (beaglebone blacks running Arch if it matters) that I would like to route to the internet by way of my Macbook's wifi. There are two ...
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6 views

Masking external ip address using cmd or script on windows

I am using Windows and I want to mask my external ip address(not the "local "). using command prompt or some script, as we do in orbot on Android by swiping up in the app. i know about Tor browser ...
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0answers
10 views

Is it possible to process millions of datagrams per second with Windows?

I am investigating if I can implement an HPC app on Windows that receives small UDP multicast datagrams (mostly 100-400 Bytes) at a high rate, using a dozen or up to maybe 200 multicast groups (i.e. ...
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0answers
11 views

Request a preferred IP address for a specific WiFi connection on Windows 7

Is there a way to ask for a preferred IP address for a specific WiFi connection in Windows 7? I have no control over the router so I'm not asking for a static address, but just to request the router ...
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0answers
8 views

Dreamweaver CC - lag when editing network based files

I run several websites from a local (MS Server 2008) server, when I need to edit anything I simply access the file over the (windows) network as a shared folder. The editing PC is a normal laptop ...
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1answer
7 views

Gateway Server Jump Bastion Host Local Setup

I want to ssh to a remote private host using an intermediate (bastion, jump, gateway) server. This command works fine: ssh gateway ssh private With this ~/.ssh/config setup: Host gateway User ...
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0answers
18 views

What is the easiest way to monitor packets sent between two devices on the LAN?

I'm trying to determine the cause of a communication problem between two devices on my wifi network. I CANNOT install programs on them to determine this. What is the easiest way to monitor the traffic ...
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7 views

Changing the name of the network interfaces in Fedora 21

I am a software tester for an ethernet switch and I am sometimes working at home. On the computer I am using at work the two network interfaces are called eth0 and eth1. On my private laptop they are ...
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6 views

router “wifi module” lagging with no logcal cause

for some time now, my rouer has been giving endless issues, with lagging, first off, ROUTER: NETGEAR DGN2200v2, Devices Connected: Wifi - Android Device, 1 Windows PC; LAN - 1 Windows PC No similar ...
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1answer
12 views

WiFi router speed drop on wired and wireless connections

I have a Linksys E900 router and I also upgraded my internet to a 100Mbps connection from 30Mbps but when I'm on WiFi I'm getting a maximum speed of 37Mbps just 4-5 feet away from the router. I have ...
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1answer
21 views

DNS , NS and Mail Server configuration for website hosted on Amazon EC2

I created amazon free micro instance on EC2. And hosted my website on that server. IP like - 52.24.220.140 Problem is that , my domain registrar is Directi.com and I don't have mail hosting also ...
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1answer
16 views

Can I run Untangle or other UTM before router?

Since I read that Untangle does not work well with VLANs, I want to know if I can place the UTM before my router. My ISP provides gigabit fiber. A box outside my house converts the fiber to ethernet. ...
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1answer
14 views

SSH very slow log in after changing sshd_config, even on LAN

I am trying to get my home server to be ssh-able from the internet. Initially (before touching any config files, just doing apt-get install openssh-server i was able to connect to in while on my ...
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0answers
13 views

FortiClient on win7 in tunnel mode, but routes NOT added

Running FortiClient 5.2.x on Windows 7 premium [corp laptop]. FortiClient logs onto SSL VPN server. User then enters the tunnel and receive an IP address on work network successfully. BUT the ...
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0answers
15 views

Client not connecting to port running openssl s_server

Question Context: I want to test a TLS handshake and see all the output (for learning/work related purposes) between my local computer (running OSX Yosemite) and a remote work server (running amazon ...
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0answers
19 views

Troubleshooting SSH across networks when ICMP is not enabled

I have 5 Debian Linux servers at my main work, and a few at some of our off-site locations, and one personal one at home. I can SSH with PuTTY from Work to any of the 5 in the same building, and some ...
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6 views

Wireless not working in Kali 1.1.0 on Alienware 15

I'm new to this and i created a usb to run kali live on my Alienware 15. Once I get in, the ethernet is working fine but if I use the iwconfig command, it says "no wireless extensions" Can someone ...
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1answer
16 views

pppd, local and remote IP address are identical, no internet access

I am using a cell modem connected to an embedded linux platform and I'm setting up a data connection over the cell modem. Note that I had this working perfectly fine but I recently created a new ...
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1answer
37 views

Is the bandwidth of the router usage divided equally?

I have a router/modem NETGEAR VEGN2610 which supports QoS. Assuming there are 2 computers downloading something that requires high bandwidth (for example a movie with torrents), will the speed be ...
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0answers
9 views

VMware player - Share internet only with guest, block access to corporate network

I want to share only the internet access from host to guest VM, the guest must not see my network, if this VM reaches my corporate network it can cause a mess cause is a clone of another server and it ...
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12 views

Google Chrome gives ERR_ADDRESS_UNREACHABLE error for HTTPS page (site is perfectly reachable via curl)

A otherwise perfectly working Chrome browser gives an ERR_ADDRESS_UNREACHABLE error for a request to a https page on port 8443. The page is reachable via curl, Firefox, Safari.. How would I go about ...
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2answers
64 views

find IP address of a device

I have multiple devices connceted to HP 1910-48g. Three of them are fingerprint scanner devices. We use them for time attendance reports. Because of some problems I have to reinstall software but in ...
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0answers
33 views

Some web downloads stop part-way through

I am running Windows 7 Home Premium 64 bit. The majority of files I download complete without error, but some stop part-way through. This happens on all browsers. Some stop at a random location ...
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22 views

network swtich have itself ip configuration geteway?

example: in switch i have plugged 20 computer cables and i want that i see switch configuration and where i can see this ip ? routers have example geteway 192.168.1.1 and this is configuration ip ...
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1answer
971 views

I sometimes get lag spikes causing ping times of 200 ms; might using different (e.g. Google's) DNS servers be better?

I live in the UK and I am a heavy gamer and I get lag spikes that take my ping to 200ms. Will using a third-party DNS Service, for example the one provided by Google, rather than those provided by my ...
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1answer
66 views

Windows 8: Ethernet traffic blocks mouse

Strangest thing ever... Basically what happens is if I have a lot of ethernet traffic, my mouse doesn't work properly anymore. It 'feels' like the mouse signal gets 'blocked' out by network traffic. ...
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12 views

wireless and LAN network sync

I was wondering if its possible to use both my lan and wireless connections at once ... i know that it is possible from the same router but i have a different situation, i currently live in a building ...
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1answer
16 views

Troubleshooting network problems in Ubuntu Trusty Tahr

So I seem to have two problems. My first problem is that I can only intermittently ping my router from my Ubuntu Desktop (by IP address). Second, my Ubuntu Desktop intermittently fails to properly ...
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0answers
23 views

OpenWRT and Not Working WI-FI driver for MT7620

I have platform (evaluation board) with MT7620a. In this platform I must install OpenWWRT. After I succes install distribution I whant to add ,launch wi-fi module but something is wrong. I using to ...
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1answer
15 views

How do I alias a hostname in OSX?

My machine at my office is named really_long_host_name.my_company.com. I'm trying to set something up so that I can go to http://desktop and have it alias to that machine. I could do this easily in ...
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5answers
2k views

Identify an unknown IP in our network

I have a network containing 20 clients. I assigned IP range 10.0.0.1 to 10.0.0.20 to them. When I do an IP scanning I see someone using 10.0.0.131 in VMware. How can I find out which IP is this IP ...
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1answer
15 views

Retrieve internet proxy server address via PowerShell

I have to retrieve the proxy server address and port via PowerShell, so I can use the Invoke-Webrequest -uri http://some-site.com -Proxy command. The expected output should looks like ...
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0answers
9 views

AT&T Motorola NVG510 - usage in India

I have an AT&T Motorola (telephone cable) modem + wireless and was planning to use that in India, but it does not seem compatible. I keep getting the DSL Failed error. Can we use this modem ...
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0answers
14 views

OSX Terminal Start VPN Connection

I am trying to find a way to use terminal to connect to an existing VPN connection (that was created in System Preferences > Network > + VPN Type: Cisco IPSec, etc etc) instead of using the VPN ...
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0answers
9 views

Using Cell Phone Voice to Access Internet

I would like to know if it is possible to access the internet through a cell phone's voice system. This is for a windows 7 laptop. I was thinking that it may work between the laptop and a desktop ...
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0answers
21 views

How does the guest OS of VirtualBox get a valid dynamic IP address?

I have install CentOS 7 in VirtualBox, and want the guest CentOS using dynamic IP address. The network type is bridged. The host OS is Windows 7, and the network information is like this: I ...
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0answers
31 views

Why some Internet service provider leave some UDP ports open, so we can access free internet? [on hold]

Why some Internet service provider leave some UDP ports open, so we can access free internet? I dont understand, Yesterday My friend started using free internet because UDP Ports are opened. is this ...
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2answers
12 views

Cant connect to a pc that uses static ip

I have one workstation in our network that works strangely, I do not know the exact terminologies, it uses a static ip which is configured in its local area connection properties. It can connect ...
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0answers
37 views

Why college admins dont block VPN? [on hold]

We all know, colleges provide High speed internet & block porn sites. Actually My friend take high speed internet as advantage & downloaded tons of porn videos using free VPN. still I dont ...
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0answers
12 views

setup a public wireless File sharing server

I have a PC (windows 7) with a specific folder with name store in it, a wireless modem and some (.apk) files in store.My clients have Android devices. I want to create a service with specific URL ...
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0answers
11 views

How to configure DD-WRT with a static IP for PPPOE?

My situation: A DSL modem set up as a transparent bridge (PPPOE). A router flashed with DD-WRT (mega). A static IP that is not assigned via the ISP - needs to be requested. I just need a pointer ...
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0answers
6 views

Routing application traffic through interface, not receiving replying trafic

I'm trying to set up a Plex Media Server on a Arch server. However most of the time the server is connect to a VPN and I want the Plex traffic to be routed outside of the VPN interface, tun0 and ...
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0answers
14 views

Change DNS server on android for mobile connection by using a VPN server [on hold]

for a project I need to change the DNS server of my Android Smartphone that is not rooted and connected via 3G. I know that there are several Apps in the Playstore that are capable of that by creating ...
1
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0answers
16 views

Virtualbox - how to custom NAT and port forward?

How can I use Virtualbox custom NAT and also port forward? For demos, I am running my VMs behind NAT on my laptop. If I run it in the vanilla NAT mode, then each VM I spin up automatically gets ...
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1answer
15 views

Networking - DNS services

It is a commonly used best practice to split an organization's DNS services, where some aspects of that service are hosted on the internal network or internetwork, and other aspects on at least one ...
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1answer
33 views

Why do I have to reboot my modem to connect a new router?

Sometimes, not all the time, when I change my router, I have to reboot the modem before the router can detect the WAN connection. This does not make sense to me. Why does it seem like the modem is ...
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0answers
33 views

Severe lag in games on Windows 10

My internet works great in my browser, but in games it's lagging like hell, since 1 week,before 1 week everthing worked fine.I have a 75MBit[down]/7.5MBit[up] internet,2 laptops and 5 smartphones in ...
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0answers
29 views

Wi-Fi Ensuring Fair Use

I have D-Link Router, and normally have 3-4 devices connected to Wi-Fi at any point. Most of times, all of devices can co-exist peacefully. At certain times, this is not possible. For examples, even ...
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0answers
21 views

Login script for Asus router to automate the login process to Tikona ISP

I am using Tikona ISP (India) for my internet connection. It uses captive portal for log in process. But after few minutes of inactivity it automatically logs out. I am using Asus router RT-N14UHP. It ...