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Questions tagged [ipv4]

Questions related to the fourth version of Internet Protocol , which is one of the core protocols of standards-based internetworking methods in the Internet.

62 questions
24
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5 answers

IPv6 is working, but IPv4 isn't

I've got a new laptop running Ubuntu 16.04 that worked like a charm for a couple of weeks but has now lost its appetite for connecting to the internet via Wi-fi. I know it's not a problem with my router or ISP, because I'm writing this post using my…
cjolley
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15
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3 answers

How to disable IPv6 on Windows Subsystem for Linux?

I tried to disable IPv6 by adding in /etc/sysctl.conf: net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 and then running sudo sysctl -p to reload the /etc/sysctl.conf settings - but that…
Răzvan Flavius Panda
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7
votes
2 answers

Ubuntu Server 20.04 - Netplan configuration for dynamic IPv4 and static IPv6

TL;DR Does anyone have a working netplan configuration that sets a dynamic IPv4 and a static IPv6 under Ubuntu Server 20.04? What works My provider (OVH) gave me a server with this configuration in /etc/netplan/50-cloud-init.yaml out of the box: #…
yaap
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5
votes
2 answers

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 subnet CIDR was wrong, but after I received…
Marged
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4
votes
0 answers

Need to configure XRDP service to listen using IPV4 not TCP6

I have installed xrdp on ubuntu 18. xrdp by default listens to 3389 so that it can support Window RDP When I run "netstat", it shows that the service is listing with tcp6 and IPV6 syntax (colon delimiters) Windows remote desktop client resolves the…
Rick
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3
votes
1 answer

Using UFW, if I create a rule, will it apply to both IPv4 and IPv6?

Will UFW create the appropriate rules in both iptables and ip6tables?
Bo Frederiksen
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3
votes
0 answers

How do you disable IPv4 on 16.04

I'm trying to disable IPv4 on a system I'm working on to check how a project interacts over purely IPv6. Does anyone know the following: How to disable IPv4 (and verify that it is indeed disabled) Check that IPv6 is enabled
sreya
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3
votes
1 answer

Disable IPv4 on Ubuntu 16.04 LTS

I want to create a pure IPv6 environment or disable IPv4 completely, not just on the interface. If it is impossible, I want to disable IPv4 on boot via the command line or a configuration file.
Thuong Tran
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2
votes
1 answer

What does the @ sign mean after a tunnel interface?

I previously asked a question on setting up a ipv4 to ipv6 tunnel. I answered my own question and this is configuration output from my previous question here https://askubuntu.com/a/992872/13903 4: he-ipv6@lo: mtu…
Tek
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2
votes
0 answers

How to verify that IPv4 is disabled on a machine?

Running a 16.04 VM and disabled IPv4 in Network Manager but I'd like a way to verify that IPv4 isn't being used.
sreya
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2
votes
2 answers

Fresh Ubuntu install unable to connect to IPv4 addresses

I just recently made a fresh install of Ubuntu 16.04 on my newly built desktop. However I'm having some internet connectivity issues. Please bare with me as I am a linux noob. Anyway, I'm unable to connect to many websites but CAN connect to…
Kevin Cianfarini
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2
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2 answers

Where is the "automatic (DHCP) addresses only" option in network?

I am trying to change my DNS to Google Public following these steps. However, my IPv4 settings lack this option. Why is it missing?
EricGabrielMari De Guzman
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2
votes
1 answer

Disable ipv6 in ubuntu 14.04

I found that post How to disable IPv6 on Ubuntu? I need to ask about this file /etc/default/bind9. I couldn't find this file. Where can i find it?
Begnnier
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2
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2 answers

How to enable IPV6 packet capturing in WireShark at the same time as IPV4?

I am running Ubuntu 15.10 with GNOME 3.18, and for some debugging work need to capture IPV6 packets going to and from a specific port, however I understand that by default IPV6 packets are not captured by WireShark, so how can I get WireShark to…
user364819
2
votes
0 answers

How do I make changes to the file /etc/gai.conf take effect without a reboot?

Per the title, how do I make changes to the file /etc/gai.conf take effect in Ubuntu 20.04 without a reboot? (I altered /etc/gai.conf to force prioritization of 4to6 (IPv4 to IPv6) tunnel traffic over IPv4 traffic, but the change didn't take effect…
Patrick Dark
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