A subnetwork, or subnet, is a logically visible subdivision of an IP network.

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Weird response when I ping x.x.x.255

This is my computer network configuration: C:\Users\user>ipconfig Windows IP Configuration Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Link-local IPv6 ...
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34 views

How can I directly access a PC in another subnet?

Ok so I have 2 subnets setup in my home network. There is a wireless router (with built in switch) connecting PC A (192.168.1.3) via a wire and PC B (192.168.1.101) via wifi. There is a wired switch ...
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20 views

Sharing IP block between two computers?

I'm not too knowledgeable in this matter so I wanted to double check here. Say I have a server hosted in a datacenter with a CIDR IP block 104.x.y.z/28, which makes a total of 13 usable IPs, not ...
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32 views

Two subnets: devices see others from the other subnet

I have two subnets x.x.10.0 and x.x.20.0 running under mikrotik router so RouterOs GUI, I have set two dhcp on ether2 and on ether3 interfaces a made address pools x.x.10.2 - 254 and x.x.20.2 - 254. I ...
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4answers
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What is the diference between IP subnet mask 255.255.254 .0 … or 255.255.255.0? [closed]

What is the diference between IP subnet mask 255.255.254.0 and 255.255.255.0?
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39 views

Connecting two home routers and change to IP addresses

Netgear Cable Modem Router Connected to Internet IP 192.168.0.1 DHCP is ON D-Link Router This is my wireless router IP 192.168.100.0 DHCO is OFF I want to use the D-Link router as my primary router ...
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1answer
26 views

Subnetting Difficulty

Taking the following example shown in the first image, why has my teacher has assigned in the solution (image 2) for network one (N1): 7+2 hosts? Shouldn't it be 6+2 since the number of hosts in ...
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1answer
52 views

iptables on openwrt router: logging connections to a host from clients on the same subnet

I am trying to setup an auto wake-on-lan setup using my router that is running OpenWRT 14.07, Barrier Breaker. My idea is that the router monitors any connection attempts to the host I want to wake up ...
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23 views

Accessing ISP subnet resources?

This is my first question here so I don't know if I would supply all the relevant and required information. The situation: I have IPTV and Internet from the same provider. I managed to get the links ...
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1answer
61 views

Why need subnet when public IP available?

I am just entering into CCNA and there is a subtle concept of subnetting that is not going through my mind. My issue is when we have a private IP address, why can't that do the job - why do we have ...
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5answers
171 views

Why is ip address listed as 172.18.0.150/24?

Why is IP Address listed with this notation 172.18.0.150/24? I mean the ip is 172.18.0.150 only why it haves /24?, and then whatever what subnet that is on should be someone else's worries, no? 3: ...
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57 views

192.168.x.x with Subnet 255.255.0.0, would like to link with 192.168.2.x with subnet 255.255.255.0 [closed]

Is it possible to connect these two networks together, without changing the subnet? For example by putting a router in between. Network A IP :192.168.x.X Sub :255.255.0.0 Network B IP : ...
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1answer
93 views

Clients from multiple subnets can't simultaneously connect to server

I have setup servers for several games in the past where either players from outside my local network could join, or players from within my local network could join, but not both at the same time. ...
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4answers
102 views

Point of subnets

This page gives two options for if you have more than 254 hosts, get another IP range or use subnets. But if you've got an IP address range which lets you have more than 254 hosts, why not just keep ...
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18 views

Networking, Creating subnets

Am having trouble trying to create a small network for my office. I have two Asus RT-N12 wireless routers, internet connection from an ADSL modem, Windows server 2012r2 which I want to be my domain ...
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2answers
41 views

Does a typical home router support classless IP address?

All typical home routers I know of allow us to set a custom subnet mask, and because of this, I am really curious about whether they support the use of classless addressing scheme, meaning that in the ...
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1answer
33 views

On boot, how can I switch to a static IP based on a gateway IP provided by DHCP?

I have a "headless" *NIX host -- let's call it 'foo' -- that is to be accessible via SSH and VNC-tunneled-over-SSH on an arbitrary 192.168.x.y/24 private LAN. Sometimes, I want to physically move ...
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1answer
29 views

Make Linux Notebook Act Like a Network Hub

I've been looking for a solution for this quite a while and I think that I am exactly as clueless as before. So I figured why not ask people who really know about this stuff... I'm trying to connect ...
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1answer
44 views

Router not allowed by landlord

I moved in to a student apartment building in Germany, and one of the rules on the list is that I cannot plug in a router to the network ports in the wall. I asked about this rule, and apparently ...
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1answer
69 views

Configuring VLANs/IP network for security and performance

My networking level of understanding is still beginner, so bear with me. I have several Ubiquiti products - USG (router), USW (switch), and UAP-AC (wap) installed in my home. I want to create ...
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1answer
41 views

Wirelessly “bridge” two subnets when in range of one another

Scenario: Subnet 1: Basic Home/Office setup with broadband internet, router, and a couple of computers. Subnet 2: Mobile trailer with a couple of computers and a router. Sometimes its in the ...
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3answers
497 views

How can you calculate IP address subnet ranges?

If you're given: Number of needed subnets: 2 Network Address: 195.223.50.0 I can answer the following: Address Class: C Default Subnet Mask: 255.255.255.0 Custom Subnet Mask: 255.255.255.192 ...
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99 views

Tool to group a list of IP addresses into IP ranges

I look after a website that is currently being flooded with HTTP requests from different IP addresses but all using the same user agent string I've grepped the log file and now have a file with all ...
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49 views

Trouble With Network - Apple Time Capsule & Cisco SG-300-10P

How can I setup my network to allow access to devices connected to the Cisco SG300-10P switch from my Apple Time Capsule? My current network setup Comcast Modem / Router --> Cisco SG300-10P ...
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620 views

IPV6 at home: my ISP delegates me a static IPV6 /56 subnet, how can I set up an IP scheme & DHCP6 for my network?

My network looks like this: (Cable Modem/Router) <-> (PfSense Router) <-> (Internal Hosts) The IP (changed for security) of my cable modem is: IPv6 Address ...
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272 views

How to allow only subnet for port with iptables

What i am trying to do is to DROP any packets to specific UDP port, except those one from my secured subnet 10.8.0.0/24. iptables -t nat -A --src 10.8.0.0/24 -p udp --destination-port 63210 -j ACCEPT ...
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43 views

Question about subnetting with switch

I have a setup which includes desktop pc, server pc(would also act as router), raspberry pi and ethernet switch (and possibly other devices if I get new switch). I would like to know if this ...
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117 views

I can ping computer on a another subnet but not vice versa

So I got two routers in my house one wireless(192.168.0.1) and another wired(192.168.20.1), I got my laptop(192.168.0.101) hooked up to my wireless router and my desktop(192.168.20.5) on wired router. ...
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40 views

Using DNS to forward to a specific local address and port?

Im running a server on a local address, a raspberry pi at x.x.x.111:64738. I own a domain, mydomain.nu. I want to create a subdomain (the hosting provides a cPanel interface) and forward it to my ...
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42 views

IP subnet /17 for latter range (x.x.128.0 - x.x.255.255)

This site shows 115.93.0.0/17 has the range of 115.93.0.0 - 115.93.127.255 I'd like to setup firewall range of 115.93.128.0 - 115.93.255.255. how can I say it with subnet? my firewall console only ...
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79 views

Create a subnet with 2 FritzBox

I want to create a network split in a Main network (192.168.111.0/24) and a Subnet (192.168.100.0/24). In my Main Network I have a FritzBox 3370 WLAN, as a Router, that is connected to the Inertnet. ...
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3answers
774 views

How to link two routers LAN to WAN

My former modem was replaced by a all-in-one modem/router (10.1.9.1/24) after a speed upgrade. I still have my DD-WRT router (10.1.10.1/24), which I want to be my main router, i. e. as DHCP server, ...
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31 views

Different subnet for different device types

I have noticed a certain pattern in a wireless network. It goes something like this: All mobile devices (Android and iOS) take the subnet 10.8.5.x. All laptops (Windows and Linux) take the subnet ...
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96 views

How do I know if two machines are on same LAN?

I am very poor with Computer Networks, even though I took class in my grad school. I keep forgetting about subnets and masks and what not! Currently, I am playing with Docker and Erlang and was ...
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how to calculate network address of an IP with subnet mask 202.145.90.7/20? [duplicate]

how to calculate network address of an IP with subnet mask 202.145.90.7/20? How many hosts can be there?
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371 views

Communicating with devices on a different subnet

Let me start this off by saying that I am very new to how IP Address / Subnet Addresses work, and networking in general. This stuff is generally mystifying, and I've had a hard time understanding ...
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112 views

Switch after Router seems to create own subnet

I have a Router (Easybox 802) connected to the Internet. It has sockets for LAN-cables and a wifi-antenna. One socket of the router is connected to a switch (netgear fs605 v2) in another level in the ...
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82 views

Ping all machines using the same software [closed]

I want to make a software that can make connections to other computers that use the same software. (within a subnetwork) But I am stuck on how to make such a software that can ping its subnetwork and ...
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3answers
59 views

What is a “local” subnetwork [closed]

I understand that subnetwork, or subnet, represents all machines that belong to the same local area network (LAN). But I don't understand what it means by a local subnetwork. Can someone explain this ...
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1answer
482 views

OpenVPN: Route only specific subnetwork through vpn - works for single IP adresses

I was trying to route only specific subnet/single through open vpn. I have read several questions like this on superuser, and even found good answer to my question. So I am now able to route single ...
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1answer
568 views

Network Config (Alcatel GPON (I-241W-S) & TPLink TL WR1043ND)

I have a fibre to home internet solution configured at my place, the Alcatel GPON receives the fibre cable and a LAN cable is fed from it to the TP Link router where the ppoe connection is etablished ...
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1answer
61 views

Subnetting an already subnetted address further

I'm a little lost with a question given by my instructor in class and just wanted some clarification on my work. The question is - Given: IP Address: 133.64.128.0 /24 Want: 37 networks ...
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51 views

Split current network installation in two Vlans

here I got a (really) tricky problem In my home I have a basic router from my ISP and the DHCP Server that serves every mac address with a static IP in this configuration : Family devices : ...
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152 views

virtualbox pinging from one subnet to another

I'm using virtualbox and I have 3 virtual machines, there's the middle vm which is a Linux Fedora 20 which has two interfaces connecting each to one subnet, the other two vms is one also a Fedora 20 ...
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1answer
63 views

Using WLAN Router without creating new subnet

I have the following network configuration at home I'm connected through a NanoStation M5 to the internet. The NanoStation has a DHCP server and provides IP addresses for all wired PCs which are ...
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2answers
374 views

Why is it improper network design to have two physical NICs, one machine, same subnet, same netmask, same gateway, two different IP addresses?

All I read and can see says to put two different IP addresses on one NIC. I thought if I had two NICs, I'd be better off for speed/throughput. Why is it a wrong topology to have two separate ...
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498 views

Quick way to calculate subnet IP and broadcast IP

I'm having trouble findind a quick/effective method to determine valid IP range based on given router IP and netmask I know how to calculate the subnet IP and the broadcast IP by converting all the ...
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1answer
82 views

Subnet Masking vs Routing

To extend a network beyond the amount of 254 hosts, there are basically two options, if I understood it correctly: I could use a second network, having a different network prefix and connect the two ...
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709 views

unable to ping my win7 computer from an another computer in different subnet while I could do the opposite

subnet A(192.168.137.0/24) has P(192.168.137.1) and Q(192.168.137.2) computers subnet B(192.168.7.0/24) has Q(192.168.7.1) and R(192.168.7.2) computers P is my windows 7 computer connected to ...
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136 views

How do I create subnets given these constraints?

I am trying to tackle the following subnetting problem: Prepare subnetting for an organization that requires 2000 hosts to be placed on the network. The maximum number of hosts on a subnetwork is 300. ...