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

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How can I access a local network device from the Internet?

I have a network with an external IP address (e.g. 40.134.70.25). Inside the network are computers with private addresses in the 192.168.1.x subnet. Is there a way I can connect from outside the ...
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5k views

When I change the subnet for the LAN interface on a Sonicwall firewall the WAN interfaces go haywire. What should I do?

Our company's old subnet was 255.255.255.0. To adjust for growth we decided to implement a 255.255.248 subnet. Upon changing this in our Sonicwall's LAN interface, our WAN connections quit working ...
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2answers
38 views

LAN to LAN with different subnet

Is it possible to have 2 routers to communicate to each other via LAN to LAN (not LAN to WAN) despite both have different subnet? Topo: Router 1 (192.168.1.0/24) Router 2 (10.0.0.0/24) For ...
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17 views

Is there any way to route between more than 2 subnets on a single (home-spec) router?

I'm not a typical network admin, it's all new to me. But I've done my homework, and I'm expecting the answer to be a flat "no", but I decided to ask anyway - just in case I'm missing something. Just ...
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1answer
23 views

What are the differences between a private network and a subnetwork?

And what are the advantages of creating subnetworks if computers are assigned different IP addresses from the same range and can communicate with each other also with switches?
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1answer
32 views

Accessing one subnet (Allnet) from another (Thomson TG712) on a local network?

I have this situation: The Thomson Gateway TG712 is received from provider, is a phone line/DSL modem, with 4 wired LAN (RJ45) connectors, as well as wireless. It assigns to itself 192.168.1.254, ...
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2answers
80 views

Class c private address of 192.168.1.0 what subnet for most amount of host addresses?

Can someone help me out? I'm sure it's 255.255.255.192 since we have to make it into 3 networks. Am I correct? You are the network administrator for a health authority in Idaho. The administration ...
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1answer
43 views

how to set up subnetwork at home?

I'm trying to achieve something that, I believed would have been very simple to set up, but I'm struggling at making this work. Basically, I have a ISP router with an internet connection, from there, ...
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872 views

Why can't I change the subnet IP address in the Virtual Network Editor in VMware Workstation?

In the Virtual Network Editor in VMware Workstation (version 9.0.0 build-812388), I want to change the subnet IP address or one of my host-only virtual networks from 192.168.203.0 to 192.168.124.0 ...
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13 views

IP overlap with cisco packet tracer simulation

PC 1 Network IP fa1/0: 192.168.1.7 /27 IP range: 192.168.1.0-31 Subnet Mask: 255.255.255.224 Router - When I type in the router IP fa1/0: 192.168.1.7 255.255.255.224 I keep getting error saying that ...
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11 views

MS Routing Server not routing from Hyper-V External Adapter

I've searched this issue but i'm not able to resolv it. I'm not able to route to a subnet! Here is a high level overview of my env: Network Overview What does work: From the MS Routing Server: ...
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1answer
112 views

Broadcast address for address 144.16.95.255?

A subnetted Class B network has the following broadcast address : 144.16.95.255. Its subnet mask (a) is necessarily 255.255.224.0 (b) is necessarily 255.255.240.0 (c) is necessarily 255.255.248.0 ...
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3answers
5k views

I'm using Cisco Packet Tracer for Simulation and got error “ip address overlaps with..etc”

The 1st row is for my router and the 2nd row is for my LAN. What's wrong? Is my IP addressing and subnetting wrong? I already checked my configuration.
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2k views

How to setup two-way routing with Tomato Wireless Client mode (different subnets)

Currently I have a Netgear R7000 as my main router, with internet coming from a Moto Surfboard SB6141 Cable Modem. I have a Linksys E3000 running Toastman TomatoUSB connected to the R7000 as a ...
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29 views

How to access a pc on local network from main network

We are in college and every room of two people has only one lan port. We belong to a college subnet: 172.31.80.218/26 Now I am connected to our lan port and have the above IP. I create a wifi hotspot ...
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1answer
43 views

How can I make my routers interconnected?

I work in a small business that has seven of the same routers around the building, which means seven SSIDs. What I am wondering is, is there anyway to make them interconnected so that they can ...
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2answers
112 views

Use ubuntu 14.04.3 box as a wireless access point, no dhcp server and eth0 to wlan0 bridging

I noticed that I had a 300Mbps N wireless adapter laying arround so I decided to use it in my ubuntu server to expand the range of my local nework, that server is being used as a samba and ftp server, ...
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3answers
39 views

Routing across subnets

We have an IP phone system on a 172.16.x.x address. This is a live system which we use every day so we know it works. The confusing part is; all the desk phones are on 172.16.1.x whereas the gateway ...
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2answers
35 views

Windows subnetmask, what's the use?

I'm in a company network where we're using two subnets: 192.168.0.* and 192.168.3.*. These are my IP's: 192.168.0.97: PC / testserver host 192.168.0.108: laptop 192.168.3.192: mobile phone The ...
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3answers
7k views

Why subnet mask for IP 10.0.1.4 is 255.255.255.0?

Well I'm not sure whether I'm missing something here. But all I've read is that if first octet of IP is within 0 - 127 then it is categorized as Class A subnet and correspondingly Subnet Mask for ...
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15 views

Linking Subnets Over DDWRT Wireless Client

This ones had me going for a few days. I have a Uverse supplied Motorola NVG589 that supplies our TV, phone, and wireless internet. In my room I have some networking gear which include an ASUS ...
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19 views

Route all WAN traffic from a subnet through a separate ISP-connected subnet

I have 2 routers that I will call, HOME_ROUTER and WORK_ROUTER. HOME_ROUTER is for home use and is connected to my ISP and WORK_ROUTER is for work use and is connected to noisy video encoders and ...
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1answer
2k views

pix 501, static route to d-link router (different subnet)

I have pix 501 cisco firewall with internal ip 192.168.10.1. I have connected d-link router (dir-655) to pix 501. The d-link router has internal ip 192.168.0.1 The picture would like something like ...
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2answers
1k views

Query site for given ip from AD sites and services

Windows Active Directory maintains a list of subnet to sites assignments (in "Active Directory - Sites and Services" -> Sites -> Subnets). The subnet-to-site associationas ar used, obviously, by ...
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1answer
28 views

Windows 7 firewall different subnets

I'm on a large company network with different subnets. There are a few win7 computers that I have admin rights on, but I'm not able to access their drives through different subnets. I can access the ...
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1answer
29 views

Guest Network and NAS

I am trying to setup a network where I can achieve several things. I might be overthinking this, but here is how I envision it working: I am willing to use 2 or 3 routers I want a network or subnet ...
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26 views

Cascading Cisco RV180 and Linksys E2000

I am trying to cascade 2 routers in my home network. I have an Actiontec DSL modem connected to the WAN port of my Cisco RV180. I am trying to connect a second router, a Linksys E2000, to my ...
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3answers
81 views

What are the best Subnet IDs for maximum number of hosts?

I need help with this problem. I know it must be either A or D since subnet mask 255.255.255.224 has the most amount of hosts. I'm confused on subnet IDs could anyone clarify why subnet ID 224 would ...
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2answers
53 views

Identify the TCP/IP classes respectively by beginning octets

I am busy studying for a network exam and I am stuck with this zinger: By studying the following beginning octets, identify the TCP/IP classes respectively 1-126 224-239 240-254 ...
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2answers
40 views

What is the correct subnet mask to use on a Class B network with a 10-bit subnet identifier?

I thought it was D but I got it wrong does anyone know what the correct answer is and why? A. 255.192.255.255 B. 255.255.255.192 C. 255.255.192.0 D. 255.192.0.0
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69 views
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28 views

I FUBAR'd the IP, subnet, and VLAN settings. Now how to access managed switch?

I have a Dell powerconnect 2748. I think I have done messed it up though when setting it up because so far I have not been able to access the webconfig of the switch after I changed some settings I ...
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2answers
195 views

How to find subnet mask only knowing the usable address

I'm studying for certification and during a simulation I stumbled in question that made me realize I wasn't so sure about calculating IPs and masks stuff. There it is: A company has a forest with 4 ...
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2answers
7k 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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1answer
34 views

Semi Network Isolation

Warning: I sincerely apologize for any kind of ignorance displayed on my part. I am not a network engineer and I do not know anything more than how to mod routers into network switches and plug in ...
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1answer
56 views

Given starting network, how many subnets with 128 address can you form

Given a starting network of 172,20.12/24, how many subnets with 128 addresses can you form? I thought the answer was 8 because 2^8 - 2 = 254 > 128 but that's incorrect It also asks for the first ...
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2answers
40 views

Server is missing default gateway information?

I'm studying for my Network+ Exam. I'm going through some practice questions, and this one has uber-stomped me in the brain. I've been going through my textbook too, and can't find a concrete answer, ...
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2answers
19k views

Lan to Wan setup how to connect two subnets

I hope someone can help me with issues I have with my home network. I have a Billion 7700N modem/router and currently I added a Western Digital N600 dual band router. By default (following setup DVD ...
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3answers
393 views

How to create a subnet between two different networks

I need some help to build my first subnet between two routers. My office is located near another office, and those two offices are linked together with a network cable, and both offices have ...
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3answers
319 views

Dividing a network into subnets

I'm finding it very hard to understand IP subnetting. The things I already know how to do: Given an IP-adres and a subnet mask, I'm able to find all ip adresses in the subnet. Given an ip adres like ...
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1answer
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Subnets on hyper V

What I'm after is a hyper V host, hosting around 6 vms. 3 of them on 1 subnet 3 of them on another And I want them all to have internet access The 2 subnets don't have to communicate. I'm using ...
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2answers
2k views

Can't connect to Cisco router's settings page

Currently I have a 2 wire modem, and a Netgear WNDR3400. What I want to do is add a Cisco RV100W for its VPN features. Currently the Netgear router is connected to the modem via the WAN port. When I ...
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1answer
59 views

subnet id, why option (2) is wrong? [closed]

An Internet Service Provider (ISP) has the following chunk of CIDR-based IP addresses available with it: 245.248.128.0/20. The ISP wants to give half of this chunk of addresses to Organization ...
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90 views

Ubuntu ethernet connection and wireless access point on the same subnet

I am running Ubuntu 14.04. I have a usb wifi adapter that has AP according to iw list. Currently my ethernet (eth1) connection's address is 192.168.1.108, and my wireless (wlan0) access point's ...
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4answers
2k views

Are subnets always contiguous 1s? [duplicate]

I understand the basic premise behind subnet masks, such as 255.255.255.0. But all the subnet examples I’ve seen have been (from left-to-right) contiguous 1s (HI bits). For instance, 255.255.0.0 (/16) ...
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34 views

How to tell if a dedicated subnet is available to a Linux server?

I'm trying to install Kubernetes and am reading an article about it that states: One key assumption that Kubernetes makes is that a dedicated subnet is available to each minion server. So I ask: ...
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1answer
118 views

VLSM: Any easy way to learn it

After my first year at university our teachers decided to make VLSM exams and exercises a bit harder. For exactly 1 year ago we got 3-4 hours to subnet using VLSM and then start with Packet Tracer ...
7
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2answers
493 views

Traceroute hops in the same subnet

in what case is there two neighbor hops in the same subnet in a traceroute output? As I know it should be only source addresses and each router interface should be in different subnet? E.g.: 1 ...
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4answers
129 views

IPv4 Routing/Subnetting

Suppose there is a setup like below: ------ -INTERNET- ------ ...
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3answers
3k 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, ...