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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Create a /16 (255.255.0.0) local network

My bare knuckles networking understanding led me to believe that if I set an IP address of, for example, 10.0.2.25 with netmask 255.255.0.0 on a machine, it should see all hosts in the subnet ...
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1answer
161 views

Broke my company's network, how do I get it set back up? [closed]

My dad moved his office. The new location will only have WiFi access, but he still needs his server setup and the other machines connected to it. The server (don't laugh) is an old Windows NT 4.0. ...
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1answer
174 views

Connecting to NAS boxes/printer located on local private WAN network

The set up Here's a diagram of my network: # Building 1 (Main) --------- | MODEM | --|------ | |-[WIRED] | --|------------------------------------------ | DrayTek Vigor 2130N ...
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1answer
142 views

how to connect two different lans [closed]

I have in my office two different LANS with two different ISP. Lan A is faster than Lan B. We want to share files and printers and everything as if it was only one LAN, the thing is that we don't ...
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1answer
978 views

no more address or address previously allocated by another server tftpd32

I am getting error Client requested address 0.0.0.70 [27/08 08:47:17.406] no more address or address previously allocated by another server [27/08 08:47:17.406] Rcvd DHCP inform Msg for IP ...
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1answer
128 views

Is Cisco Misquoting the Nexus 7000 specs [closed]

Looking at the following image: http://blogs.cisco.com/wp-content/uploads/7000-family-550x358.png Cisco is quoting the 7009 as having a 10GigE density of 336 and a backplane bandwidth of 550G/slot. ...
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1answer
161 views

Is a Fabric Module required for a Nexus 7009, or is it part of the Chassis?

I noticed that Cisco lists separate fabric modules for the Nexus 7009 switch. If I were to simply buy the Nexus 7009 Chassis (N7K-7009), what would I need at minimum? I just want to confirm, but I ...
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5answers
3k views

QoS for very basic LAN/WiFi network: Do I need SmoothWall or OpenWRT or just good advice?

Here is the basic situation/topology of the network I manage: Residential, but we are a co-op, so we have a business-class contract with ISP. The residents are college students, so there is quite ...
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1answer
128 views

Multiple WAN to single LAN

I have a block of static external IPs and I'm trying to route them to a single internal server. We have a Sonicwall TZ-210; trying to set this up results in no outbound traffic and an error warning ...
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1answer
61 views

May a low DRAM router be a bottleneck for a LAN?

I need to install a LAN that is a hybrid between a star LAN and a cascade LAN. There are two levels (I mean that the maximum number of link to go from the central switch to the most external switch is ...
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1answer
116 views

How to bind stackable switches

Let's say that I have a non modular switch, and that in future I might need to expand my LAN, connecting it to more switches. If I take stackable switches, physically how do I bind them? May I take a ...
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1answer
61 views

Adding some content to html response

I would like to know is it possible to achieve with (my guess is) a proxy server to add some content to users response? Let's say I would like to add a div to each html document which is being ...
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2answers
165 views

How to implement firewall in LAN(out of users' os) like EC2 have done?

In aws ec2, users can set up security groups which works like a firewall, usually, firewall work behind a gateway/nat server, however, I found that firewall in EC2 works in the LAN, too. For example, ...
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4answers
109 views

LAN Load Balancing Router

Everything I find is for WAN load balancing. Our customer wants to have a setup where two servers are connected to the same router. To the outside network devices connected to the router, they think ...
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3answers
63 views

How to find to which network i'm actually connected [closed]

In our office we have both LAN and Wi-Fi network. say i have now connected to both LAN and WiFi. now when i give ipconfig. It is showing both LAN IP and also WiFi IP. I want to know, to which network ...
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1answer
59 views

Easy management of multiple connections

on a Windows 7 machine I need to switch back and forth two connections: the LAN connection (that works behind a proxy) and a wireless connection via a USB modem. This requires every time to activate / ...
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0answers
134 views

Clients suddenly stop receiving data from the network

I'm facing a connection problem on a small network: 10 clients connected to a Netgear WNR612v2 WiFi router with DHCP disabled; 4 clients connected to a Linksys WRT160NL router with DHCP active and ...
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2answers
532 views

How can I configure my network to allow bi-directional traffic between two lans?

Here's my current setup: (and it may require reworking): 2 LAN networks - 192.168.41.0, 192.168.21.0 2 Public IP's (they are assigned to us by specifying MAC Addresses - not subnetted) ...
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4answers
120 views

local SSH works when using “localhost”, but not using IP address

I'm having difficulty setting up ssh for a laptop on my LAN. I think I have done all the obvious things. On the server: ps -A | grep sshd 18278 ? 00:00:00 sshd and ss -lnp shows sshd ...
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3answers
445 views

Migrate raw disk image over LAN

Here is my situation: Two dedicated servers in the same datacenter with gigabit ethernet between them. Both dedicated servers booted into a rescue environment based on Debian Squeeze with extra ...
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2answers
473 views

how can I block all traffic that is coming to and from an IP address using iptables

I am trying to block all traffic that is both coming and going to an internal IP address (this server acts as a router for the network). so far I have tried the following: iptables -A INPUT -s ...
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2answers
94 views

OpenVPN as a service, client physically connected to network

I've got OpenVPN running as a service on a client's computer, however oftentimes he will be in the office and able to physically connect to the network. The issue I have with this, is that even when ...
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2answers
607 views

How do I send hostname info to Airport DNS from Linux? [closed]

My router is an Airport Extreme. I can easily ssh to other OS X machines via hostname.local (example1.local, exmaple2.local, etc) once it is set in in the preferences. But despite the fact that my ...
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1answer
372 views

Dual-port server acting as router, but LAN can't see WAN

Using Windows Server 2012 Essentials. I've got two ethernet ports. One is connected to a router which is connected to the internet. This portion of the network is fine. The router runs DHCP on the ...
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2answers
127 views

What do I request from the LAN upgrade contractor to avoid simple oversights? [closed]

The company for which I work have allowed me to hire a LAN wiring contractor to completely overhaul the building LAN. Currently there are old 10MBit Ethernet cables and switches running and I ...
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2answers
160 views

LAN users not listed over wifi

I recently created a small office network with 10+ computers. 9 of them are desktop computers so I used Ethernet cable to connect them.. The computers are connected to a switch via a patch panel and ...
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4answers
4k views

Connecting multiple switches to a router

We have an office network that consists of the following: 1x Vigor 2950 5-port (WAN Load Balancer) 2x Netgear 24-port Managed Switch FSM726 1x PowerConnect 2724 24-port The Vigor has our two ADSL ...
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1answer
193 views

MPLS link not forwarding

We have a new MPLS service and I'm having trouble getting it to work (it seems like a routing issue). It's a T3 with two circuits: a public wan port and a private MPLS circuit connecting 2 sites. ...
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5answers
8k views

Unable to access local network when Cisco VPN client is connected

I'm a developer and don't have much networking expertise, so bear with me. I'm using the Cisco VPN Client 5.0.02.0090 to connect to my work's VPN that way I can RDP into my work computer. Once ...
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2answers
1k views

Password protect wired LAN?

The title is not a mistake, I really am talking about wired, not wireless. Essentially, I was wondering if it was possible to password-protect a LAN wired network to enhance security and only allow ...
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1answer
226 views

ubuntu set up as router lan pc can ping one direction and get shares but other direction can not ping or connect shares

I have ubuntu router questions. you can see tracert can complete on way but not other way. How to make that work? (a better visual layout exists here) ...
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3answers
99 views

what's the difference between ICMP prohibited ICMP unreachable?

If I want to forbid a route to response a network, should I use ip route add unreachable 209.10.26.51 or ip route add prohibit 209.10.26.51?
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1answer
539 views

Subversion server behind firewall and Apache reverse proxy exhibits intermittent hanging

Here's my situation: 1) DMZ: I have an self-signed SSL Cert on an Apache server (our bastion host) configured to run as a reverse proxy for 7 other LAN servers (subversion, ldap, jenkins, ...
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1answer
253 views

2 nic cards in ubuntu PC, one to router, one to win7 pc, make connected pc on router talk to win7 on 2nd nic

There are 2 win7 pc, 2 100 mb/s routers and 1 ubuntu 12.04 pc. I scanned a diagram of the Lan setup with IP's ...
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1answer
73 views

Standard solutions to keep LAN connection up

Do you use some "standard" solution to manage your server connectivity? In particular, how do you ensure that, week after week of uptime, your LAN remains connected, even if the router should reboot ...
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2answers
91 views

Securing LAN by restricting New Users

How can we restrict any user's PC connecting to the network based on their MAC Address?
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3answers
4k views

Duplicate MAC address on the same LAN possible?

Let's say someone is on the same network as me and spoofs their MAC address to match mine: Is this possible? Can two or more clients with the same MAC address be on the same network at the same time ...
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3answers
616 views

Prevent administrative users from assigning duplicate static IPs to their workstations

How can I prevent a user that is an administrator on their local machine from manually assigning an IP to their network adapter that is in use on a server? Some users have done this, and it's caused ...
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2answers
461 views

The ping response time doesn't reflect the real network response time

I encountered a weird problem that the response time returned by ping is almost fixed at 98ms. Either I ping the gateway, or I ping a local host or a internet host. The response time is always ...
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2answers
3k views

(Zywall USG 300) NAT bypassed when accessing in-house-server From LAN Via domain name

My situations is like this; i host a number of websites from within our joint network solution. On the network is basically 3 categories: the known public, registered via mac, given static dhcp ...
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3answers
151 views

No route to host after changing interface to static ip [closed]

I installed a Linux (Ubuntu) server inside my home LAN, initially it's automatically configured to use DHCP interface. I'm connecting to this server from another computer using that server's hostname. ...
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1answer
149 views

Router vs switch in a LAN [closed]

If I have a LAN and and connect it with a switch, I understand it uses a CAM table to route packets in layer 2 (by saving mac to port relations). So far all good. However, when using a router for a ...
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1answer
2k views

Unable to connect to a local MYSQL server on wireles LAN

Ok, Here is the technical description. My laptop's config: Ip Adress:192.168.2.5 Mysqlserver 5.0 on port : 3306 Operating system: Ubuntu jaunty (9.04) 3306 is open for both incoming and outgoing. My ...
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2answers
2k views

Can't ping some IP addresses in the same subnet (LAN) Windows 2011 Server

Hi I’m running in Windows Small Server 2011 server standard (192.168.1.108), it’s my dhcp and dns server too, but suddenly all other users can’t get internet. My gateway is 192.168.1.1. After a lots ...
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2answers
121 views

Cisco sg100-08 connections

I have multiple computers, some have a 10/100 ethernet adapter while others have a 10/100/1000 ones. If I connect them together with the Cisco sg100-08 switch, do I keep the 1Gbit speed where possible ...
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1answer
57 views

Would it be risky to disable LMHash in GPO?

I run a AD server with Windows 2008, I have clients running XP and Windows 7, now I've decided to enforce Lan Manager authentication by refusing LM & NTLMv1 encryption methood, would it be risky? ...
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1answer
562 views

How to enable TCP/IPV4 disabled on LAN via command prompt [closed]

I have unchecked tcp/ipv4 protocol from LAN properties & now iam unable to access the server or connect remotely. However i have serial console access to the server where i can use netsh command. ...
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1answer
2k views

CSS, JS and images are not loading while sharing WAMP over local network [closed]

I have share my wamp over my personal LAN . (Server IP : 192.168.0.100) When I am trying to access wamp server it's working perfectly. But when I open website hosted on server using client machine ...
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0answers
271 views

Accessing My Xampp services from WAN [closed]

Hi and forgive me if I am unclear in this question as I am trying to get back to development after my fourth brain surgery in 2 years so I feel a little groggy. I am trying to set (and learn how to ...
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1answer
66 views

VPN That Hijacks Lan (Can I use a VM?) [closed]

I have to use a VPN for work 'citrix anyconnect vpn' which unfortunately also routes lan through the VPN. This is a feature of the VPN. Is there a good / easy way or guide to do something like ...