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

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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
65 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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25 views

How to use multiple IPs on dedicated server? [migrated]

I have this dedicated server with /29 IPv4, and I would like to know how to use all the IPs I have avaliable. How to choose? How can I know which are the IPs? Can I use them like proxies with proxycap ...
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36 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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17 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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1answer
118 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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1answer
53 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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36 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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1answer
74 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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27 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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1answer
21 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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30 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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1answer
139 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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2answers
22 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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2answers
52 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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2answers
61 views

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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1answer
61 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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2answers
64 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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1answer
60 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
53 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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151 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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175 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
47 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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45 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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72 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
48 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
191 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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211 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
60 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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417 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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89 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. ...
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266 views

How to connect 2 home routers to connect 2 separate networks?

I don't know if it's a silly question, but I'm not very good at networking. So please help me out. I have a Netgear WNDR4500, and I configured my PCs and virtual machines setting the WNDR4500 ...
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1answer
42 views

How to calculate subnet of your interface based on the destination IP and subnet?

I am new to networking and linux so I am not able to fix this problem. I have a power controller connected to my linux PC (eth0) through a switch with the default static IP of 192.168.1.100 and subnet ...
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568 views

Cant ping to computer but reverse ping can

So Computer 1 can ping to computer 2 but reverse it can't Setup : router A (192.168.0.xxx) 255.255.255.0 > Router B (192.168.1.xxx) 255.255.255.0 So computer1 on Router B can ping to computer2 on ...
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1k views

how to split up network into two subnets with only one router

I have one router on my home network. This acts as the main WiFi access point for all devices, as well as being connected to a simple switch for my home lab. I would like to be able to isolate my home ...
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107 views

Arch Linux device with static IP address, new router not finding the device

I have a device running Arch Linux on my network (Raspberry Pi to be exact) and I do not have a cable for the display. I typically used it by ssh client and had it configured for a static IP address ...
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1answer
69 views

IPv6 subnetting - coverting decimal to hexadecimal

I came across a question on IPv6 subnetting, You work as a branch network administrator of a large company with offices in many cities around the world. The corporate network is currently in ...
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2answers
119 views

Subnetting based on networking needs

I am unable to visualize the solution to the following question Your company has obtained the 131.107.168.0 /21 address space from an ISP. You now need to design this address space to accommodate the ...
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1answer
73 views

Is it possible to sniff packets on other subnetworks?

I've been reading about packet sniffing and was wondering if it's possible for someone to sniff packets on subnetworks other than the one they're on. Since the point of a subnetwork is that devices ...
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3answers
108 views

How come I can ping google but not a PC on a different subnet within my campus network?

I am a newbie to the networking world. I know that one cannot ping two PCs connected to different subnets unless you have a router in between. But, I was wondering how come I can ping www.google.com ...
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23 views

Relationship of routers to networks

I was wondering, in networking, what is the relationship of routers to networks? Can the same router be the gateway for 2+ networks? For example, if I have a wireless router at home, can I configure ...
2
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1answer
264 views

Windows Networking - Treat two subnets as one network

We have an existing (old) network (10.0.0.0/24) and we're trying to add another (new) subnet (20.0.0.0/24) using a Cisco 2901 router. I added the appropriate routes and tested everything out. We're ...
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2answers
391 views

Cannot reach the computer in WAN

I wanted to split the internet connection in my room. And my brother also wanted a better wifi accessability. So we bought a router (NETGEAR JWNR2010v5). All we wanted works great, good wifi. I have ...
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57 views

Active directory sites and services

I have 192.168.1.0/23 subnet for wired connection and 192.168.2.0/24 for wireless connection. Do I need to add 192.168.2.0 in AD Sites & services. Right now I have 192.168.1.0/24 added in the ...
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69 views

Double NAT with access to both gateway web interfaces

I have a Cisco Linksys E3000 home router that I appreciate. However, my new (but temporary) ISP will want me to use their Huawei router for their service once I get connected next week. This creates ...
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1answer
80 views

how the pc1 checks pc2 subnet

pc1 and pc2 are different subnets Actually if a pc1 wants to ping pc2 at first pc1 checks pc1 & pc2 subnets whether they equal or not if not the frame will not cross the nic of pc1 my question ...
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1answer
657 views

static IP outside of subnet range

I have two questions, but let me explain the situation first. They are about the (static) IP address of a printer attached to the network. We had this networking setup, using a normal consumer router ...
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3answers
2k views

Connecting 2 different subnet masks

I'm no network genius, but I have managed to get most things running. I get confused about subnets and gateways though. We have an office server connected to around 20 PC's that all communicate fine. ...
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1answer
1k views

Home network with two routers and just one Wifi

I know it is a pretty lame question, but I am not a pro in networking, so I will still ask it. And I will try to explain details where possible. I want to create the following setup: Phone line is ...
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24 views

Should we load smaller subnets into Active Directory

Our network team is splitting up the subnets in each of our offices from /16 and /18 subnets to multiple /24 subnets. Our systems team is not changing Active Directory sites and services to replicate ...