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Questions tagged [ip-address]

An IP address is a numerical address given to any device connected to a network.

An IP address is a numerical address given to any device connected to a network, for example 192.168.2.1 Questions concerning IP addresses and issues caused by IP conflicts, creating static IP's, and questions concerning networking issues in relation to IP address allocations, can be tagged with this tag.

111 questions
59
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3 answers

How do I add an additional IP address to /etc/network/interfaces?

I have an extra IP address available to my server, and so I need to assign it in the interfaces file. At the moment, I've got this: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address aaa.aaa.aaa.aaa netmask 255.255.254.0 …
babbaggeii
  • 927
52
votes
3 answers

How can I (from CLI) assign multiple IP addresses to one interface?

On my server I want to assign several IP addresses to one NIC, but without using the deprecated ifconfig or the obsolete "alias" notation (like eth0:0) in /etc/network/interfaces because in IP Aliasing (on www.kernel.org) you can read IP-aliases…
guntbert
  • 13,475
52
votes
3 answers

Modify the SSH welcome message to include system IP address

I have had a couple of occasions where I was unable to remember the IP address for a given system but was, at the time, able to connect using the hostname. As an example, just now I wanted to set up port forwarding on my router and couldn't…
miststlkr
  • 635
20
votes
4 answers

How do I add an additional IP address to an interface in Ubuntu 14

I want to have the wired interface simultaneously obtain a DHCP address, and also alias a fixed address so I can communicate with a device with a fixed IP address on a different subnet over the same link. When searching for IP address aliasing in…
tim11g
  • 583
20
votes
3 answers

How to identify and rectify IP address conflicts in Ubuntu?

We have more than 500 machines running Ubuntu. I have noticed that many machines have IP address conflicts. Is it possible to identify IP address conflicts in Ubuntu? See the output here. What does it mean actually? I get same MAC address for all…
karthick87
  • 84,513
15
votes
5 answers

What is my computer IP address knowing that I have a router?

My computer is connected to the Internet through a wifi-router. I want to have access to my computer remotely, for example using ssh. When I ask my computer what my IP address is, for example by going in the network indicator, I get 192.168.1.101.…
Agmenor
  • 16,394
10
votes
1 answer

RFC7217 (stable privacy addresses) implementation in Ubuntu 16.10

I'm the author of IETF RFC7217, and I'm trying to figure out whether Ubuntu 16.10 implement support for RFC7217. It seems that there is no support in the version of NetworkManager Ubuntu is using, or such support is disabled. Can you confirm…
Fernando Gont
  • 101
10
votes
4 answers

What is the most authoritative file/process for managing IP addresses on an 18.04 server?

The 18.04 server installation process creates /etc/cloud/cloud.cfg.d/50-curtin-networking.cfg, which, in turn, seems to generate /etc/netplan/50-cloud-init.yaml. I can't seem to find exactly how 50-cloud-init.yaml gets generated from…
kartik_subbarao
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7
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3 answers

How to find the IP address for a device on a network

I am trying to get an IP camera connected to my Ubuntu Linux (16.04) machine. At work I am responsible for a camera network of more than 60 cameras, however there I use some window tools to determine IP addresses etc. for Axis cameras. At home now,…
witenitenz
  • 422
7
votes
3 answers

How to fix my local ip address

I want my private IP address 192.168.xxx.xxx to be fixed and do not change, Is it possible? I am using Ubuntu 14.04. I need it to work even when I change the network? Thank's
Lola Loulita
  • 221
7
votes
3 answers

Which process is accessing which IPs?

After installing Conky and listing all my inbound and outbound connections I start to wonder what's actually happening and what and why things are happening. I'm getting a bit suspicious. How can I know which process is accessing which of these…
Qohelet
  • 737
7
votes
1 answer

Allow Connections to VNC Server Only From Specific IP Addresses

I administrate an Ubuntu 11.10 Server. I've installed tightvncserver on it so I can have a desktop environment on the server. My issue now is, I'm running into issues with malicious people spamming the VNC server with authentication attempts. I've…
Brandon
  • 73
6
votes
3 answers

Access WSL2 Ubuntu's application on hosted machine's network

I'm running a app in WSL2 whose distribution is Ubuntu 20.04. I can access the application in windows browser with Ubuntu's IP. Now, I want to access this application on my network ( I mean in my office network on other machine) I understand that…
Raushan
  • 163
6
votes
3 answers

How do I set a static IP address?

My eth0 is using DHCP to get IP address for Internet. However I still need to set some static IP for my LAN. The following is my setting in /etc/network/interface. Any problem on the script ? I always failed when I try to start network. I checked…
iAsk
  • 163
5
votes
1 answer

How do I ping the Ubuntu host system from a Windows guest in VirtualBox?

I connected to a wireless point and use "ifconfig" but I don't see any IP in eth0. Where's my IP address? Sorry if this is a silly question. :) I want to use "ping" in Virtualbox Windows 7 guest. Which IP should I type in that machine?
emeraldhieu
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