Questions tagged [subnet]

A subnetwork, or subnet, is a logically visible subdivision of an IP network. The practice of dividing a single network into two or more networks is called subnetting and the networks created are called subnetworks or subnets.

Filter by
Sorted by
Tagged with
-1
votes
0answers
11 views

Docker container with multiple macvlan for specific ports

I'm using macvlan for my docker containers to make them accessible for multiple subnets. But I'm looking for a way to specify which port is accessible on which subnet?
-2
votes
1answer
95 views

Connect Router on Different Subnet [closed]

I see people genuinely helping out here but please stop with down-votes.I wouldn't have posted on server fault if this wasn't really a business problem.I am going to upgrade this network with a ...
-1
votes
1answer
64 views

Multiple Subnets within ESXi host

I'm trying to create some subnets on an ESXi (version 6.7) host and have some VMs within these subnets with one or more that act as gateway between them. I'm trying to do this creating another VLAN on ...
2
votes
0answers
20 views

Can't activate licenses on EC2 instance in private AWS subnet (but CAN download updates)

I've got an EC2 instance running WP in a private subnet behind an ELB. Everything is mostly working fine - traffic is being delivered via ELB, the private instance can download package updates and ...
0
votes
1answer
15 views

Connecting industrial devices to OPC server while keeping segregation

We have two industrial machines (let's call them Holding and Media) with configured network addresses 192.169.0.122 and 192.169.0.123 respectively. Currently they are isolated physically although ...
0
votes
0answers
16 views

ND Packets get dropped by a router in Packet tracer

I created a simple ipv6 network in packet tracer. I need it for my school project and my problem is, that I have 2 routers: 1 ISP Router with a static IPv6 address and 1 school router that provides an ...
0
votes
0answers
26 views

Configure PFSense to reach subnets not directly connected to LAN INTERFACE

Good afternoon, Kindly note i am new to Pfesence, I need the device to reach the 172.30.28.0 subnet which is it is not directly connected to. To the best of my knowledge PFsense can not route traffic ...
1
vote
1answer
78 views

Fix UDP issues on subnet

I currently have a network with the following topography: topography Networking is fine and all works well, except for one thing: UDP seems to be unstable/not working on the subnets 192.168.3 and 192....
1
vote
0answers
20 views

Network latency & Performance for inter subnet traffic in a AZ

My current local DC deployment has 2 subnets inside a datacenter where data is injected to the instances on a subnet A and then the instance is migrated to subnet B to serve traffic We need to migrate ...
0
votes
0answers
19 views

need help to understand tcpdump

Background: I have a web server hosted on 10.20.30.177:7000 and it should be accessible from 10.20.30.1 (m1) and 172.17.2.88 (m2). I am able to access from m1 and not from m2. I understand there can ...
0
votes
0answers
604 views

Multiple subnets through VPN openvpn

I'm facing the following problem and after a huge amount of trial and errors i could use ask for some help. Situation: SiteA have LAN network: 192.168.101.0/24 while SiteB have LAN network 192.168....
-1
votes
2answers
51 views

How many subnets are best practice?

What is the general best practice for subnetting a small (abt 15 servers) network of vms and physical machines? How granular should it be? Do you want to have a logical subnet or vlan for every ...
0
votes
1answer
49 views

How do I set up multiple interfaces on Windows Server 2019?

I am working on setting up a small vm host cluster and I have the following setup : Windows server with multiple network interfaces Aruba 2930f switch Switch is connected to internet (gateway 192.168....
0
votes
1answer
142 views

Kuberenetes Node to Node Communication Not working as expected

Hello to All I do Have problem on My Kubernete Cluster Specification Cluster NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION ...
1
vote
1answer
98 views

Any security benefits on separating AWS subnet?

In case of we have proper security groups and private/public subnets, is there any security benefit on separating AWS private subnet? For example, I have 1 ELB(public subnet) and 2 EC2(Frontend and ...
-2
votes
1answer
229 views

How to configure subnets/VLANs to restrict access to WAN/other VLANs?

I manage the networking for our (very!) small church as a volunteer. Currently everything is set up on a single /24 IPv4 subnet. I'm wanting to break these out into VLANs for increased security, and ...
0
votes
0answers
30 views

sending Udp Datagram across different subnets behind router

I have a sample Windows computer network as shown in attached example network diagram. I want to send a simple udp packet from laptop 02 to laptop 04. I have also added manual static routes in the ...
2
votes
0answers
37 views

ssh via static route on different subnet hangs after approx. 30-40 s

Before I had this setup: LAN: 192.168.1.0/24 (GW/router: 192.168.1.1) -> router 192.168.1.111 -> LAN2: 192.168.88.0/24 First router/GW pfSense box, second router Mikrotik (with firewall etc.). ...
1
vote
0answers
20 views

VMware with 2 NICs forwarding

I have two computers in a VMware lab environment GW1 and SVR1 (so far) I want to set up a computer (GW1) with 2 NICs that functions as a gateway. One NIC is auto-bridged (as it says auto let's say IP ...
0
votes
1answer
38 views

One IP address does not respond to ping

Ok so here's the situation: I have a DMZ subnet, x.x.x.x, and this IP address( x.x.x.63 | 255.255.255.0 | gateway x.x.x.1) fails every ping request by any other device in the network but still works ...
0
votes
1answer
82 views

How to forward all traffic and IP addresses

I want to build a system that allows me to have "floating IPs". To do this, I want to have a single server with 5 IP addresses. It then relays that traffic to another machine (or more) ...
0
votes
1answer
296 views

How can I create two different subnets for 2.4 and 5GHz WiFi, and maintain communication between them?

I have two routers that are interconnected via Cat5 cable: a TP-Link Archer C7 and an old Netgear V7610. I am trying to create two subnets on the same LAN, and maintain communication between all nodes,...
-1
votes
1answer
73 views

How to access second subnet that has IP cameras but don't want them to have access to the internet

My setup is: Internet modem/router with IP range of 192.168.0.X Debian PC's and Android tablets are connected to that via Ethernet cabling or Wifi. NVR with 16 cameras. The NVR has an IP address of ...
0
votes
1answer
190 views

CentOS 7 - Cannot change subnet mask

I just noticed that this CentOS 7 server's subnet mask is 255.255.255.0. It should be 255.255.255.240. # ip a show ens32 | grep ens32 3: ens32: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc ...
1
vote
1answer
44 views

Shrinking subnets in a an AWS VPC

Our primary VPC is configured with four subnets. As you can see below, the four subnets span all of the available ip-addresses within the "10.50.?.?" block. Since all of the available ...
0
votes
0answers
18 views

Windows server VPN behind Mikrotik, routing subnets

Setting up a VPN server for point-to-LAN usage. VPN server is Windows RAS L2TP, internal subnet is 192.168.0.0/23, so I obviously ran into a subnet conflict problem, as most home users have an ...
0
votes
0answers
83 views

How to make Linux kernel send ARP requests down multiple network interfaces with overlapping subnets?

I have a Linux PC with the following physical network interfaces: Primary LAN/Ethernet port used for most traffic. Ethernet (from external device) to USB (into my PC), used to connect to a single ...
0
votes
1answer
117 views

VMWare Workstation VLAN - Vyatta routers not able to ping each other

I have two routers configure to be within the same VLAN - LAN 2 https://i.stack.imgur.com/Wo1KR.png https://i.stack.imgur.com/qnDtQ.png And here are the network configurations: Router 1: https://i....
0
votes
0answers
140 views

Client-subnet based forwarders on Windows Server 2016/2019 single DNS-server

I have a setup with a Windows Server 2016 domain controller on one subnet, and client sites on other subnets on other locations. All client subnets connected to the server subnet via IPSEC L2L tunnels....
0
votes
1answer
189 views

How can I assign a public IP address to each of my devices?

My ISP (plusnet) has given me a block of 8 IP addresses I can use, so each of my devices can have a different public IP address. Unfortunately, they don't offer support on how to do this, I've tried ...
0
votes
0answers
66 views

Change netmask from /24 to /23

We need to change our netmask in one of our sites since we plan to deploy VoIP phones. Currently we use a class A network address with a /24 netmask and would like to move to a /23 netmask. We have 1 ...
0
votes
0answers
39 views

Is it possible to create a new network on a LAN with another router?

I have a main router (Zyxel XMG3927-B50A) in my house that is a gateway on 192.168.1.1 connected to the WAN and I have another router (DrayTek Vigor2830n) that is connected to the main router. Is it ...
5
votes
3answers
4k views

connect two routers with different subnet

I've seen a lot of questions about this, but haven't really understood/didn't match my issue. I'm a newbie regarding networking. I got two routers, both are connecting to the wan (giving them ...
0
votes
1answer
89 views

WOL on single host with multiple NICS in same subnet

apologies if this has been answered before but I have not been able to find this specific kind of scenario and I'm not sure how to filter search results for something like this. Here is my scenario, ...
0
votes
0answers
27 views

Intermittent Network Across EC2 in Public Subnet / VPC. Tool to determine cause?

we have a fairly complex set-up of g4dn instance types running vMix with NDI, TeamViewer, and other streaming protocols to operate a live stream. We've had a several occasions in which TeamViewer ...
0
votes
2answers
90 views

confused about CIDR interpretation

I am beginner in networking and trying to understand subnetting. What I understood is that CIDR notation (Classless Inter-Domain Routing) is an alternate method of representing a subnet mask. It is ...
0
votes
0answers
75 views

Can SharedVPC subnet can be attached to a particular service project

In GCP Shared VPC , my understanding is that each subnet created in the host project are available to all service projects attached to same host project. So if Project A and Project B are service ...
0
votes
1answer
344 views

Ubuntu 20.04 server unreachable from external world [closed]

i have an Ubuntu server where i can not access the server from external machines. I have tried to ssh to the Ubuntu machine but it seams that all requests are drooped or does not arrive. I have not ...
0
votes
0answers
20 views

Nextcloud Server from inside network only answer to one client but outside network works fine

I have set up an nextcloud server inside a network. The network consist of a border router 192.168.1.1 and a subnet with another router at 192.168.1.3. The server sits in this subnet. On the border ...
0
votes
1answer
123 views

changing netmask of loopback interface

I can change netmask of loopback inteface (usually lo interface has 127.0.0.1/8): pi@raspberrypi:~ $ ifconfig lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 ...
0
votes
1answer
35 views

How am I receiving ARP brodcasts from a different subnet?

My local IP/subnet is 10.33.19.*/24, and yet I am occasionally receiving broadcasts requesting information from and concerning IPs in the 10.17.*.* range. I was of the impression that ARP requests do ...
0
votes
1answer
1k views

Netplan, two gateways for two subnets

I'm trying to get working following: Have 2 subnets (ie. 192.168.15.0/24 and 192.168.19.0/24) and two gateways (192.168.105.1/24, 192.168.109.1/24), and Ubuntu 18.04 server with netplan as router (.1/...
0
votes
0answers
30 views

How to have an OpenVPN client access a device on a subnet of another OpenVPN client?

Here is our network setup: The Device Manager software on Server A needs to open connections to Device B and Device C, which are on private subnets behind Servers B and C. I was told that it would be ...
-3
votes
1answer
60 views

Need explanation for a public WiFi network [closed]

I came across this network on a public WiFi on a Railway Station. I wanna know the network and the details and most specifically, how I was able to get an IP from the range 100.x.x.x as Private IP ...
4
votes
7answers
2k views

How can we explain CIDR notation with /24 and /32 to a manager? [closed]

Update: I seem to get two kinds of answers and I need to get more clarity on how they relate (or not). What we have so far is, roughly in the lines of: you have 32 bits, the / indicates how you split ...
-1
votes
1answer
80 views

Are Subnets Truly Secure? [closed]

Subnets are managed at the VM level. A compromised VM can change it's subnet to loop through all the possibilities. By their very nature, surely they cannot be considered secure? Note: I'm not a ...
0
votes
0answers
39 views

I need help connecting to system running as gateway

I need some help with a new network I set up. I have a network setup according to the Masquerade Alternative on this answer, with the tap and bridge, and everything is mostly working. Here's a (bad) ...
1
vote
1answer
71 views

Linux default gateway wrong?

I deployed a VMware vCloud appliance and before deployment I'm asked to enter the IP addresses this appliance should use and the default gateway. This appliance has 2 IP addresses and nics by default ...
0
votes
1answer
186 views

Server 2019 AD Subnet “Best Practice”

While assigning subnets to a single server on a single site, I am not sure which way to properly create the subnet. Example: If I have a single DHCP Scope of 10.190.8.0/21 (addresses 10.190.8.1 to 10....
1
vote
1answer
53 views

Route Table Multiple Subnet Entries?

So just as a bit of context, this is for a VM running that does call processing. So I was looking at the route table on the VM, and noticed that it has this: 12.12.12.64/28 dev bond15 proto kernel ...

1
2 3 4 5
17