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

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Scan using nmap on a different network

My system is connected to a router and that router is the part of LAN. How do I scan other systems that are a part of the LAN to which my router is connected ? My Router's DHCP allocates C-class ...
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1answer
16 views

How come LAST_ACK doesn't enter CLOSE_WAIT?

When a TCP connection is closed at one end of the connection - the other end receives a FIN and responds with an ACK. This end of the connection then enters the CLOSE_WAIT state. Once close() is ...
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14 views

How do I kill mbuffer properly?

I'm trying to use a script to send a series of files over a network from hard drive to hard drive via mbuffer. I've got a listening mbuffer on one computer and a sending mbuffer on the other. Things ...
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1answer
15 views

How can I improve my wireless connection?

I recently built a machine running Ubuntu 14.04 using a TP-Link TL-WDN4800 PCI wireless network adapter. When I click on the wireless connection icon on the Ubuntu taskbar, it almost always tells me ...
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3 views

Make host services available on guest's network

Ubuntu 14.04 LTS (Host) Windows 7 (Guest) The host and the guest are on physical different networks via different NICs. The Windows 7 guest is installed via PXE on a bridged network (fixed IP, own ...
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12 views

Properly setup a DNS Fallback

My country just ordered the Internet Access Providers to blacklist some domain names from their respective DNS (i.e. responding to t411.io by 127.0.0.1). To get over this restriction is fairly ...
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1answer
10 views

ISAKMP negotiation error connecting to VPN from China?

I am attempting to connect through SonicWall Global VPN Client. It comes up with the following error much of the time when trying to connect: "The peer is not responding to phase 1 ISAKMP requests. ...
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0answers
2 views

How to set manually scale factor of receive window size in windows8? (Window Scaling - RFC 1323)

My internet download/upload speed is 6.0/0.6 Mbps. One day, when only I was using network bandwidth on LAN, I started downloading a large file from YouTube by using IDM. Initially, I easily use all ...
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1answer
28 views

Understanding power lan - from a tech point of view, why does it get slower

I do use power lan at my home. I found out that every few weeks, the connection speed drops. My internet has usually a download of 3.5 mb/s. It drops to a 0.55 mb/s. It's an easy fix, plug the pwer ...
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0answers
11 views

Localhost server is working but not with ports

I manage to start some Game servers which uses 127.0.0.1. I have XAMPP installed with Apache & MySql servers running on. The issue I'm facing is that localhost and 127.0.0.1 are working fine. ...
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1answer
11 views

Wifi Card Removed, computer still shows data packets sent/received

I have purposely removed the wifi card on my macbook in order to work offline securely. The "Activity Monitor" still shows packets are being sent/received. How is this possible? Of particular ...
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1answer
16 views

How is this application accessible over network?

I was asked to install a program on a business, and they want me to replicate the current implementation they have, the problem is...They don't know how it was done.. They have a business software ...
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1answer
15 views

Connect virtual machines

I have a Linux machine with an IP address (for example 172.16.x.x). With some hosted virtual machines, each machine is accessed with different ssh port (eg 2230, 2234...). For instance in VM1 I have ...
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1answer
24 views

Two Slow DSL or One Fast DSL? [on hold]

I'm planning to do a lot of video conference chat, unfortunately, at 2Mbps, there are times I experience loss of sound during chat and even without using the internet, there are times that the ...
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1answer
26 views

Ignore and override ISP router

I have an ISP router with 10.1.5.x subnet, and I do not have any access to change that to 192.168.1.x The ISP is not willing to release the admin password, and I am not going to force the issue. I ...
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11 views

Routing subnet to specific routing table with fwmark, direct to ISP and VPN

Introduction I'm trying to set up a VPN on my router so that I have two routing tables. I want it so that all the filtering is done with iptables, and iproute just acts on the specific fwmarks, ie ...
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21 views

Monitor network usage by app on a Windows 7 Embedded kiosk

My company operates a growing number of kiosks running Windows 7 Embedded. Because of their location (at grocery stores & retailers) we are moving to using 3G and 4G wireless modems on a shared ...
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0answers
7 views

Xen VPS with 2 IPs from 2 different subnets

I am new to Xen and I am trying to understand how to add 2 different IPs on the same guest VPS. First, I am going to explain my node setup, which is a physical server with 32GB RAM and 2 NICs on it. ...
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19 views

Wireless controller for OpenWRT access points

I have around 30 OpenWRT access points in our building (plenty of them are old Linksys). It's time to update wireless network. Some of old APs will be replaced with TP Link Archos Ac1750. Problem is ...
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1answer
16 views

Packet Loss/High Ping with One Computer Seems to Affect Entire Network

I'm having an issue with my PC. I have a wireless router/modem combo box that was provided by my ISP and am having issues with a single PC on my network. The PC is connected via WIFI and often will ...
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0answers
5 views

Is it safe to connect to network share via VPN?

I have a NAS running somewhere and I have configured VPN access for it. I usually need to access the files outside the NAS LAN, hence VPN. I'm currently accessing it through "\\MYNAS" on Windows ...
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0answers
17 views

Is it possible to remotely/wirelessly access a device via ssh and then use another wifi adapter to turn on monitor mode?

I have a Raspberry Pi and since it's a very portable little thing, I decided to try and tinker with the network using that instead of trying with my phone. My question is, is it possible to and ...
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1answer
31 views

Running a web application without internet on ubuntu

I have a web application running on Apache server which responds to the mobile client requests over the internet. My plan is to implement this in to an offline Linux pc which does not have any ...
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1answer
20 views

how to open port in ubuntu?

I have open port 3003 that working correctly on all remote connection . when i type command: netstat -tupan | grep 3003 then it gives output ekodev@ezp:~$ netstat -tupan | grep 3003 (Not all ...
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1answer
25 views

DNS for home network with dnsmask: doesn't change IPs

I've got a home network: three hosts on OS X and printer. All the devices are wireless and connected into a network via Actiontech T1200H router which is also provides internet. One computer(MacPro) ...
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9 views

How can I get net.lo back in Debian?

I've found ways to do this for Gentoo (copy/paste and/or emerge baselayout), but I'm running Debian. In dom0 I've accidentally deleted /etc/init.d/net.lo. Don't ask, it was a stupid mistake. How can ...
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22 views

Windows 7 Error Windows cannot access \\Computer

I have four computers on my home network: a 2003 Server in the domain NETCON, a desktop XP machine, a laptop XP machine and a laptop 7 machine. All the machines can see each other on the network. All ...
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13 views

OpenVPN client fails to activate pushed DHCP options for DNS and DOMAIN

OpenVPN client is connecting to OpenVPN server OK. During connection, we see the options pushed contain dhcp-option of DNS 10.0.0.2 and DOMAIN prd1.o2: Sun Aug 2 17:31:06 2015 PUSH: Received ...
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13 views

TP Link Archer C7 Router Speed Suddenly Gets Capped to 10mbps

I have a TP Link Archer C7 AC1750 Wireless Dual Band Gigabit Router hooked up to Comcast 100mbps cable internet. For about 10-15 minutes, the Wifi on the router consistently gets 100mbps (via speed ...
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1answer
14 views

Does VMware or VirtualBox use the same internal IP address as the host?

I would like to use my desktop computer to host a virtual local home server, and would like the internal IP addresses of my desktop computer and the virtual one to be different. Does VMware or ...
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24 views

Intel 82579V LAN driver dropping out

My PC has an Intel 82579V Gigabit Network Connection and the on-board LAN adapter has started misbehaving over the last few days. When I boot up, the PC has no LAN connection. The entry in device ...
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10 views

How can I see a website running on Apache installed on my PC from another device connected to the same ADSL router?

I am not so into networking and I have the following problem. On my Ubuntu system I have installed Apache web server on which run some web sites. So now to access to these web site I need to open an ...
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22 views

Need help to Deploy Windows7 image in a workgroup

I am maintaining a windows 7 workgroup of around 50 PC's (in one room, and multiple rooms like this) in an educational institute. All hardware platforms are identical. No server. all in one workgroup ...
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4answers
7k views

What's the difference between 127.0.0.1 and 0.0.0.0?

I understand that 127.0.0.1 points to localhost, and so does 0.0.0.0 (correct me if I'm wrong). So, what's the difference between 127.0.0.1 and 0.0.0.0?
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6answers
5k views

Why is a router needed?

I‘ve been trying to figure out why a router is needed. I know a router can be used for DHCP and some other things, but I’m just thinking of networking with static IPs. So the following: Is it ...
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14 views

How much upstream traffic should a transfer over TCP produce

When a file is downloaded via some TCP-based protocol, there is also data flowing in the other direction – acknowledgement packages etc. Now if I watch some network monitor, I wonder if all of the ...
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18 views

Create fake WiFi network and monitor clients

I'd like to create a WiFi network using my MacBook Pro mimicking my network at home and monitor all clients that connect. I want to do this because I lost my iPad and I think this is the only way to ...
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11 views

How to log vnstat or equivalent to file

I have a few servers that run both Linux and OS X. I would like the ability to capture and log the amount of data passing through eth0 interface. The file should look like this and rotate daily with ...
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1answer
12 views

(Windows 8.1) Launch a specific software if IP address is 192.168.49.*

I know there's is a way to launch an executable when specific condition are met, but i'm not familiar with programming. Is there a way to launch a software, in my case Skype For Business if my local ...
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0answers
20 views

Apache: how to access the web application from another hos on local network?

Home network: three hosts on OS X (192.168.1.61; 192.168.1.62; 192.168.1.63) connected into network and to internet wirelessly via Actiontech router. One(192.168.1.61) has Apache server (with ...
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0answers
15 views

Nic not showing up in device manager

I recently installed a new mother board and hard drive and have had trouble installing my wireless network card. On my old computer it worked fine but it seems it is not appearing in the device ...
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0answers
15 views

Linking 10.0.2.0/24 IPs with 192.168.1.0/24 IPs

The Problem I am currently messing about with some of the network tools in Linux, and I have found that if I perform an nmap scan using the 192.168.1.0/24 range, I get a bunch of lovely device names: ...
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5 views

RaspberryPI OpenVPN Client Not Forwarding to tun0

reposting from the RPI SO - apparently off topic for Server SO... I found plenty of guides for how to run RPIs as OpenVPN servers, but I want to run it as a client. I have a OpenVPN server set up ...
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2answers
19 views

NIC can't get IP address/connect all of a sudden

As the title implies, I'm having NIC issues. Anyways, as of last night it was working perfectly. Then this morning it was having issues, with Windows showing "No Internet Access". I rebooted the ...
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9 views

Auto shutdown if there's no 'real' network traffic for a 'homeserver'

Hello I just installed my homeserver I'm using the following: TvHeadend PyLoad NzbGet Samba I plan to shutdown if the up/downstream by those services is less than 1 Mb/s(Bandwith) or Traffic in ...
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3answers
28 views

What is the equivalent of Ubuntu /etc/network/if-pre-up.d/ in Fedora (22)

I'm trying to migrate from Ubuntu to Fedora(22) but I can't find how to run a network script before the interface is up. Is there any equivalent of this /etc/network/if-pre-up.d/ in Fedora? I need to ...
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0answers
10 views

How to set proxy server Squid on CentOS multiple connections for download

I am now using Cent-OS and i have installed squid proxy server completely. The problem i meet is when I use Internet download manager and set proxy) to download a file, Internet download manager could ...
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1answer
21 views

Identify an unknown windows workgroup ip address

In our small company network sometimes an unknown windows workgroup appears. I'm know the name of this workgroup but have no further information about this. I do not have admin rights in the network, ...
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28 views

Get data usage since last reboot by command line

For an automated batch-tool that monitors network usage, I would like to get the following, red underlined values using the Windows command line: That is, I want to get the number of bytes ...
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1answer
82 views

Windows 10 VPN client is not working

In Windows 10 (an upgrade from Windows 8.1), old VPN PPTP connections were not correctly migrated. Created new VPN PPTP connection which was not working.  Error message: A Connection to the remote ...