How do I permanently disable IPv6 in Ubuntu?

How do I permanently disable IPv6 in Ubuntu? 

Follow these steps:
  1. Log in with root privileges.
  2. Open the /etc/sysctl.conf file with the following command: $ sudo vim /etc/sysctl.conf. Add the following lines to it: net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1. Now save the file and reboot your computer with the following command:

How do I disable IPv6 UFW? Enable or disable ipv6 on ubuntu ufw netfilter firewall. The /etc/default/ufw file is a high level configuration file, to change default policies, add IPv6 support and kernel modules. Edit the section in file, change variable IPV6 to no.

Can I disable IPv6? Go to “Settings” > “Connections” > “Mobile networks” > “Access Point Names.” Select your mobile network operator. Scroll down to “APN protocol.” To disable IPv6, select “IPv4” in the menu.

Is it OK to disable IPv6 Linux? No, do not disable IPv6. It breaks things, turns users without v4 away, and makes more work for your future project to use IPv6. A host with only IPv4 addresses and routes will serve web sites just fine without doing anything. v4 and dual stack hosts can still get to it.

How do I permanently disable IPv6 in Ubuntu? – Additional Questions

What does disabling IPv6 do?

Summary. It is common for IT administrators to disable IPv6 to troubleshoot networking-related issues such as name resolution issues. Internet Protocol version 6 (IPv6) is a mandatory part of Windows Vista and Windows Server 2008 and newer versions. We do not recommend that you disable IPv6 or its components.

Is IPv6 enabled Ubuntu?

IPv6 network protocol is enabled on Ubuntu 18.04 Linux by default. Execute ip a linux command from your command line to see your current network settings. After executing the above sysctl command the IPv6 network addresses are no longer present.

How do I know if IPv6 is disabled Linux?

You can check the content of /sys/module/ipv6/parameters/disable file to get the IPv6 status on the Linux server.

What is IPv6 Internet?

IPv6 (Internet Protocol version 6) is the sixth revision to the Internet Protocol and the successor to IPv4. It functions similarly to IPv4 in that it provides the unique IP addresses necessary for Internet-enabled devices to communicate.

How do I disable IPv6 in rhel8?

How to disable IPv6 on RHEL 8 / CentOS 8 step by step instructions
  1. To temporarily disable IPv6 address execute the following command from your terminal with administrative privileges: # sysctl -w net.ipv6.conf.all.disable_ipv6=1.
  2. Confirm that IPv6 network addresses are disabled.

How do you release IPv6 address in Linux?

3. Removing an IPv6 address
  1. 3.1. Using “ip” Usage: # /sbin/ip -6 addr del <ipv6address>/<prefixlength> dev <interface> Example: # /sbin/ip -6 addr del 2001:0db8:0:f101::1/64 dev eth0.
  2. 3.2. Using “ifconfig” Usage: # /sbin/ifconfig <interface> inet6 del <ipv6address>/<prefixlength>

How do I find my IPv6 address Ubuntu?

Run ifconfig -a and look for inet6 to see your possible IPv6 addresses. Run netstat -nr and look for inet6 or Internet6 or similar to find the IPv6 portion; then look for default or :: or ::/0 .

How do I remove an IPv6 from an interface in Linux?

Command line
  1. Open a terminal window.
  2. Change to the root user.
  3. Issue the command sysctl -w net. ipv6. conf. all. disable_ipv6=1.
  4. Issue the command sysctl -w net. ipv6. conf. default. disable_ipv6=1.

How do I delete an IPv6 address?

Open Network and Sharing Center. On the left, select Change adapter settings (Windows 7) or Manage network connections (Vista). Right-click the connection for which you want to disable IPv6, and select Properties. Uncheck Internet Protocol Version 6 (TCP/IPv6) and click OK.

How do I know if IPV6 is disabled?

How to Enable or Disable IPv6 in Windows
  1. Open the Control Panel Panel with small or large icons.
  2. Click on Change adapter settings.
  3. Double-click, or right-click and select Properties from the network adapter you want to modify.
  4. Check or uncheck the box next to Internet Protocol Version 6 (TCP/IPv6).

Can I disable IPV6 on my router?

To login to the router’s web-based interface, look for the URL and login password are on the back of the router. It’s likely and admin/admin. Once logged in, click Advanced (at the top), then click IPV6 (left-hand side), and then under IPV6 LAN settings, choose Disable (as show below).

How do I disable IPV6 in the registry?

Open the registry editor. Press Windows key + R. In the Run dialog box, type regedit and click OK.


  1. Right-click on Parameters, select New, then DWORD (32-bit).
  2. Set the name to DisabledComponents and press Enter.
  3. Right-click on the new entry and select Modify. Set the Hex value to FFFFFFFF and click OK.

How do I enable IPv6 on Linux?

  1. Log in to the host as root or using an account with sudo permission.
  2. Run the following command: sysctl net.ipv6.conf.all.disable_ipv6.
  3. Enter the StorageGRID node container: storagegrid node enter node-name.
  4. Run the following command: sysctl net.ipv6.conf.all.disable_ipv6.
  5. Exit the container: exit.

Is IPv6 faster than IPv4?

Without NAT, IPv6 is faster than IPv4

That’s in part because of the proliferation of network-address translation (NAT) by service providers for IPv4 Internet connectivity.

How do I use IPv4 instead of IPv6?

The preference of IPv4 over IPv6 can be enabled by changing the registry key DisabledComponents with the registry value Hex 0x20 (Dec 32). Copy Paste and run in command prompt as admin. The registration method to favor Windows IPv4 over IPv6 is a general, but less system-compliant solution.

How do I force IPv4?

On the left, click on the Connection category. Under Internet protocol version, select ‘IPv4’. Adjust any other PuTTY settings you normally would use if needed (i.e. X11 Forwarding setup), and click Open to connect back to Pronto.

How do I set IPv4 as default?

Configuring the IPv4 Default Gateway
  1. Go to Control Panel > System > Network > IPv4 > Default Gateway.
  2. Under Use the settings from, select an interface that QES will use as the default route.
  3. Add a static route. Click Static Route. The Static Route window opens. Specify an IP or subnet address.
  4. Click Apply.