Questions tagged [subnet]

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Why does the Ubuntu Server installer ask for both a subnet and IP address?

When installing a new Ubuntu server instance, the installer asks for a subnet in CIDR notation and then it asks for an IP address without CIDR notation. Why can't I just specify the IP address in CIDR ...
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Two devices in the same network, but not same subnetwork

I have 2 Ubuntu systems in the same network. IP A is 149.201.37.66 and IP B is 149.201.55.106 I want to use a tool, which needs both systems to be in the same subnet: AAA.BBB.CCC.xxx. I can ping both ...
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30 views

Connecting a remote client to an openVPN server running on Ubuntu

I am really stuck on this one - please help. I have an openVPN server running on Ubuntu 18.04. I have a Macbook running as a client. The Macbook connects to the VPN server without problems if it ...
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Ubuntu Server network setup help

I have been working for hours trying to figure this out but the installer wants some sub net format I don't understand and google can't provide and clean and clear answer to. I've never dealt with a ...
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2answers
3k views

Installation of server does not accept subnet CIDR

I try to install a server from scratch with a fixed IP address. For installation I use the provided ISO of 18.04.3 and the installation agent of Ubuntu. First I thought that my understanding of the ...
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1answer
71 views

ubuntu server not accepting connections from subnets

Yesterday I rebooted our kvm server (added more rams) and now it will not accept connections from our VPN subnet. The VPN is working just fine as we can connect to any other resource on the network ...
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1answer
2k views

Ubuntu Router with different LAN subnets

I have an ubuntu 18.04 router with several LAN interfaces: 1st interface: 2 port 10G NIC (the interfaces are bonded/teamed) bond1: interfaces: [enp5s0f0, enp5s0f1] 2nd interface: 4 port ...
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How to prepare a server for proxy on Ubuntu 16.04

I'm trying to prepare a proxy server using Ubuntu 16.04, my server has the following nics: enp4s0 Link encap:Ethernet HWaddr 00:15:c5:f6:c0:36 inet addr:192.168.0.101 Bcast:192.168.0....
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virtualbox ubuntu network set

I am kind of new to Ubuntu and networking. I am trying to create on a VM (which is set on NAT network) to create two subnetworks. I tried to create on /etc/network/interfaces two new interfaces eth1 ...
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567 views

Tunnel internet through laptop to other pc

Following setup: I got a wireless network at home that my laptop connects to to access the internet. I also got an IOT2000 board, which is basically a small PC running Linux. My Router does not have ...
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1answer
946 views

Configuration of ufw for one user. Noob

I have several sudo users on Ubuntu 16 PC. ufw is disabled on this PC now. I need to switch ufw on for sudouser1. I need to make following config: 1) allow all and any incoming and outgoing ...
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697 views

Improve speed of “sshuttle” with multiple connections?

In the sshuttle documentation: "It’s valid to run sshuttle more than once simultaneously on a single client machine, connecting to a different server every time, so you can be on more than one VPN at ...
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2k views

How to SSH between Client and Host on Different Subnets, Same Network?

On Home Network with two subnets: Client IP is 192.168.1.41 (Router subnet, netmask 255.255.255.0), SSHServer IP is 192.168.0.3 (Modem subnet, netmask 255.255.255.0). If I try to SSH from Client ...
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3answers
2k views

Connect to connected OpenVPN client from different subnet

I have a machine running Xubuntu 17.04 that is connected as a client to a VPN via OpenVPN (2.3.11). When I have the client connected, I can access the machine remotely via SSH and VNC if I am on the ...
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Second Network Interface in Subnet of default route

I've got a 16.04 server with interface em1 in my companys a.b.0.0/16 subnet AB. For reasons reasons I can't change, there is a protected subsubnet ABC within this range called a.b.c.0/24 which I only ...
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1answer
62 views

share wired connection to wifi adapter ( external ) [duplicate]

I'm connected to the internet using wired connection and I have an external TP-LINK wifi adapter. I want to bridge connection from wired to wifi adapter, then to my iPhone. How can I do this?
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1answer
486 views

IPv6 Host Discovery?

I am trying to discover all IPv6 hosts on my MASSIVE business network (like a /32 block). I have an nmap script I think that works but sadly only for my local subnet. Would this work if I changed my ...
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1answer
92 views

How can I dynamically determine the IP mask to use for dynamic ranges?

I have a list of ranges for IP addresses that I want to block, the ranges are like 210.80.32.0 to 210.80.63.255 How can I dynamically determine the right 210.80.32.0/NUMBER to capture the full range? ...
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1answer
1k views

Installing Ubuntu OpenStack AutoPilot on VMware Workstation - network config

I am following the instructions here: http://www.ubuntu.com/download/cloud/install-autopilot-testdrive At step 2 (!) it says "make at least a full /24 subnet available", but there are no instructions ...
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3k views

How to setup Multi Dhcp Server

I'd configure isc-dhcp-server and its works fine but now we are running out of range as we are exceed 255+ active devices. Current configuration: eth0: 192.168.0.1 I want to setup following things. ...