LAN, short for Local Area Network, is a network that connects multiple devices in a limited geographical area, such as a room, an apartment or a building. Currently, most LANs are based on Wi-Fi or Ethernet transmission.

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Node not Obtaining IP Address [on hold]

Infrastructure: Modem-Router has 4 Ethernet Ports. Port 4 is reserved for IPTV (VLAN). Switch A is attached to Modem-Router on Port 4 to host IPTV. 2 IPTVs are connected to Switch A. Switch B is ...
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20 views

What and How should be network design for 5 floor building? [duplicate]

5 Floors. 1st floor-185 nodes, 2nd floor-160 nodes, 3rd floor-340 nodes, 4th floor-100 nodes. My server Room is on Third Floor. Plz help me to find my network should be distributed with hub room at ...
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11 views

Add additional Access Point to network with no access to LAN

I've recently installed/configured OpenWRT on my main dual-antenna gateway router. My LAN has two wireless networks on 2.4GHz and 5.2GHz. I also have a Guest network on these two antennas. This ...
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24 views

Getting slow upload (to internal Win box) only from Win10

I have a user in the office who was on Win7 Pro. Since there's a Win10 upgrade going, I thought I would test/piolit it with her, so I loaded Win10 on a spare Lenovo box (MT-M 7052-A7U). Everything ...
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2answers
49 views

Prevent non-privileged user from changing file extension and invocation parameters

On an office LAN, I want to install an MS-Access database. I will place the database in its own hidden folder. On another folder (folder1), I will place a link to the hidden db file in folder1 (hidden ...
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1answer
21 views

Route to specific server over a single IP address

Is there any way to route a request from a specific subdomain to a specific server over a single external IP address. So for example Sub1.Domain.com:1234 goes to 12.34.45.6 and enters my local ...
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7 views

I have one NIC with two conflicting IPs. Fix? [migrated]

I searched for my problem, and although there are similar questions none guided me in the correct direction. Sorry if it looks like a duplicate question. I have a LAN behind my ISP modem, routed by a ...
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29 views

avoid data leak by block internet access for PCs, but allow internet access through remote desktop

In a small network(in my company), I would like to block some computers(PCs) to access the internet, so that sensitive data or files in those PCs can not be leaked. But I still need users of the PCs ...
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33 views

How to prevent disconnection / reconnection attempts on private LANs without internet connectivity?

I am developing an appliance system which is meant to be transportable, used monthly in a different location, for ~100 simultaneous users, with laptops and tablets. The system includes a server (http,...
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21 views

Apache web server - FTP host connection issue in LAN

OS: Ubuntu 12.04 Web Server: Apache 2.2.22 Apache web server IP Address: 192.168.0.21 Virtual Host for website in Apache: 50000MySite001 Link to access website in LAN: 192.168.0.21/50000MySite001 ...
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1answer
57 views

Ping in local network pings myself

I have two computers on my local network: Laptop 192.168.2.11 Windows 8.1 Tower 192.168.2.10 Windows 7 If I use Laptop to ping Tower, which has the local IP 192.168.2.10, I will get a result from ...
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11 views

printers go off-line - WSD?

We have a small peer-to-peer network running mostly Windows 10 (and a few Windows 7 machines which somehow escaped the Microsoft Forced Upgrade). We have a networked (no print server) HP Laserjet Pro ...
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1answer
44 views

PfSense box not passing traffic between WAN and LAN

I just tried to insert a PfSense box into my network and I seem to have broken something in the process. Need some outside help to point out any errors I might have missed. The setup was working ...
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1answer
84 views

Block DHCP server from other network

I have problem on PC's (Windows 7) with two network interfaces, sometimes nic that is supposed to be in network 10.1.19.0 has address from 192.168.0.0 My networks: 192.168.0.0/24 with DHCP running on ...
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1answer
40 views

Two subnets, two DHCP servers. How to stop both DHCP servers from responding to requests from both networks?

I have an environment with two subnets 192.168.1.x/24 and 192.168.2.x/24 Each subnet/network has a Cisco RV082 router as the gateway and a domain controller in each environment that also has a DHCP ...
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36 views

How do I reduce private network latency below 0.5ms?

We are migrating from one host to another. Our cluster consists of 10 dedicated linux servers which must communicate on a private network. At the old host we observed latencies below 0.2ms between our ...
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18 views

Smaller subnet mask to “merge” VPN-connected LANs?

I have two LANs connected to different internet connections (in different cities, in fact): ISP1 -> LAN 1: 192.168.10.0/24 ISP2 -> LAN 2: 192.168.11.0/24 On each LAN is a router. Both routers ...
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1answer
45 views

Capture traffic to/from a network node

I would like to capture all traffic to/from a network node. I don't know much about the network setup there, here's what I know: The target node is a Linux server, which has no access to internet, ...
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1answer
53 views

Network maps, best admin practises and how them saved your ass?

I am reviewing the security of a (quite large) network. There are a some thousands switches, several hundred routers, several hundred access points, tenths of FW, IPS, and so on. PCs and servers are ...
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2answers
153 views

Can't resolve hostname by ip address over nslookup [closed]

I've got an Ubuntu Server on my LAN. I can fully use it (samba, ssh, apache2, xmpp...) by using it's ip address. But I want to use the hostname to connect (e.g. ssh). When I do a nslookup with the ip ...
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1answer
93 views

extremly slow lan speed between the working station and the server [closed]

when you are transfer a file to our server it takes realy long time but when you are on the server and transfer a file from a drive to another it just do it immediately i had tried a ping test and ...
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78 views

dnsmasq use LAN ip for resolvable LAN hosts, forward to external DNS otherwise?

This may be a duplicate but I was unable to find the exact answer, so I apologize in advance if it is. I have a dnsmasq instance running on my router, as well as some hosts which are accessible on ...
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2answers
39 views

Local network for websites

I'm a student doing an internship at the moment. I mainly develop websites using virtualbox and vagrant. I was wondering if i could like make the websites i build accessible for everyone in my network....
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2answers
85 views

Win 2012 server will not resolve domains using web browser, PING or NSLOOKUP, yet services on server are working

This is a windows 2012 server running SQL 2014. The server does not seem to be able to resolve IP address when given a domain name. The problem first showed itself when I tried to go to a web page ...
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2answers
70 views

How to Connect a Core Switch with an Edge/Client Switch using SFP+ Ports

I am not sure if this is the correct site to post this question and I am more a software type of guy that needs to get started with Networking, so please bear with me if this sounds stupid... Having ...
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1answer
67 views

Route LAN traffic and Internet Windows Server 2012 R2

I have a Windows Server 2012 R2 (AD, DNS, DHCP, IIS). MY internet connection is 10 0Mbps Up, 10 Mbps Down. Whenever I transfer files between computers in my local network it transfers via internet at ...
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1answer
61 views

Server 2012 R2 - Features on Demand - role not actually being removed

This is for learning purposes: I'm running a Server r2 machine and I'm trying to remove feature WINS. I run uninstall-windowsfeature WINS -restart -remove, I then restart, and then run get-...
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1answer
37 views

Cannot access website but others can

My problem is that, I have just set up a server on my internal LAN and now it is in a datacenter. Everyone else can access the server and use it as normal. I however, cannot. When I ping the domain ...
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1answer
34 views

Connecting 3 server blades to the internet and a non-internet connected LAN simultaneously

I just got a new position where my primary function is software development. As some side work they have me doing a little networking and a little administration. The latter I have some experience ...
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44 views

When a computer wants to send a IP packet to another computer in the same network, how does it know the destinamion MAC address of that host? [closed]

So I know that switches are better than hubs because they can forward an Ethernet frame exactly to the host that has that specific destination MAC address. However, when two computers communicate, ...
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2answers
2k views

How to make lxd containers accessible to the LAN

If I use Virtualbox to spin up a VM, I can select "bridged" as the network adapter type and this results in the guest/virtual NIC being connected to my physical LAN and hence getting a LAN IP from my ...
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1answer
73 views

Can't discover a IPv4 link-local address when having an static IP configured

I have link-local addresses working out-of-the-box when coupled with DHCP, since when there's no DHCP, the device doesn't get an IP, only a link-local one. Still, I need to have link-local addresses ...
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87 views

Group Policy Application on Boot with MSTP & really really fast computers

The latest generation HP computers with solid state drives and Win 10 are booting so fast that Multiple Spanning Tree Protocol is not allowing network access in time for Group Policy to process on ...
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1answer
142 views

How to get hostname for ip on a local network? [closed]

Disclaimer: not a sys admin/network expert so please bare with me. I'm trying to get the hostname for a given ip of a computer in a local network. The current test setup I have is a few single board ...
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2answers
32 views

IPv4 assigment strategy in LAN: based on location vs. based on uniqueness of device

In our small office for many years I use IPv4 address assignment scheme based on location of user device, like: room #1: ip-range #1 room #2: ip-range #3 room #N: ip-range #N For me it has an ...
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1answer
49 views

D-LINK DSR-250N lan issues

I'm having problem with my DSR-250N router. I set-up local network with 10 computers. Some of them are connected through wire and some use wireless. The problem is, sometimes one computer cannot ...
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2answers
55 views

Apache can't change listening IP-address

I can't get Apache to listen on a specific IP address. It's a local web server, not public. I'm on CentOS 5.11 using Apache 2.2. The default configuration httpd.conf works great but only listens to ...
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1answer
29 views

DNS requests from a local server to another local server

I have two servers running in one network. External IP of main server: 1.2.3.4 (domain.com) External IP of secondary server: should not be available directly from outside Main server (dns, mx, www)...
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2answers
72 views

How to know the external ip address of my gateway?

In my office network i unknowingly changed a setting of my gateway of lan network .. I had set my phone's ip address under a section in setting which states that.. Only this ip can login to the ...
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1answer
64 views

How to send lan traffic to bypass the vpn for android

How to send lan traffic to bypass the vpn, for that network 192.168.3.0/24 directly appealed to the wifi router, and do not through the VPN
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1answer
52 views

Static routing between LAN, IPSec and VPN

I got the following network setup: LAN: 10.10.2.0/24 -> IPSec -> 10.10.1.0/24 (VPN Server addr: 10.10.1.5/24) VPN: 10.10.3.0/24 IPSec connection is transparent Users between 10.10.1.0/24 and 10....
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1answer
52 views

Direct server to server traffic via LAN

This may seem like a dumb question... or it may well be a dumb question (lol)... but its something I have never had to deal with and know little about. I have 15 physical servers in a datacenter, ...
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2answers
48 views

Two different locations running as one on server? [closed]

I am with a new company, and I am trying to make sure I am understanding the way it is set up on the server. There are 2 locations, and the second location is connected to the network and Server (...
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177 views

Change Windows 2012 R2 Network from Public to Domain

I upgraded the Network Card Drivers for my Domain Controller but now it is seeing the local lan as a PUBLIC network which is messing with my firewall rules. How do I switch it back to DOMAIN?
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1answer
197 views

adfs proxy and dmz configuration

I am trying to setup an ADFS proxy in a DMZ as per Microsoft's best practices, but do not really understand how this is done practically. The basic premise is that a server is placed in the DMZ and ...
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169 views

IP address change eventlog in Windows System

Domain Controller - Windows Server 2008 R2 Standard Client OS - Windows 7 prof. Recently on one of my Windows Server 2008 R2, the ip address has been changed. So i need to know how it has been ...
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99 views

SoftEther Site-to-Site VPN

I have already already setup a Site-to-Site connection via the SoftEther bridge package. (Please see attached diagram). I enabled SecureNAT on the central server, and to avoid conflict with my local ...
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11 views

PC name won't appear as it changed

I have a LAN at work. I have renamed all PCs. I mean I have changed all computer names. And when I am scanning the network with netscan, some PCs appear with old names. In Windows Network settings,...
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30 views

Cannot connect to LAN when VPN connection is active

I have a headless server (skynet) which I would like to connect to a OpenVPN server running on a VPS I've purchased. The VPN is up and running and when I test to it with my laptop, I have internet ...
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1answer
69 views

IPv4 SYN, ACK & RST issues

Good day, I asked this question in the Network Engineers StackExchange and was told to ask it here. I am running a roundup server (Ubuntu 12.04) and the roundup-mailgw (python script) is no longer ...