How do I Fully Enable IPv6 on SafeSquid Appliance?

[umashankar]

Enabling the IPv6 can be done in two ways.

* Enabling IPv6 in kernel module:
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1. Need to edit /etc/default/grub and change the value of kernel parameter ipv6.disable from 1 to 0 in line GRUB_CMDLINE_LINUX.
Changes made at Kernel module requires reboot.
Note: ipv6.disable=0 is the default value, so you can simply remove this argument ipv6.disable from GRUB_CMDLINE_LINUX argument list.

IPv6 Disabled

ipv6_disable.png (10.29 KiB) Viewed 2014 times

IPv6 Enabled

ipv6_enabled.png (9.74 KiB) Viewed 2014 times

2.Regenerate a GRUB configuration file and overwrite existing one using the command.
update-grub
Below grub update should be done without error like below.

Update grub

update_grub.png (8.52 KiB) Viewed 2014 times

3.Restart system for the changes to take effect.
shutdown -r now

[umashankar]

*Enabling IPv6 using sysctl settings:
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Even if the IPv6 kernel module is loaded, it could also be disabled by using sysctl settings.
1. In order to enable IPv6, please make sure below lines in /etc/sysctl.conf are commented out or removed or change 1 to 0

IPv6 Disabled

ipv6_disable1.png (6.99 KiB) Viewed 2010 times

cat /etc/sysctl.conf | grep ipv6
net.ipv6.conf.all.disable_ipv6 = 0 ## either comment/remove this line or change its value from 1 to 0
net.ipv6.conf.default.disable_ipv6 = 0 ## either comment/remove this line or change its value from 1 to 0

IPv6 Enabled

ipv6_enabled1.png (2.95 KiB) Viewed 2010 times

2. Use the command ‘sysctl -p’ to re-read the configuratiion file /etc/sysctl.conf.
sysctl -p
Changes made at sysctl settings required no reboot.

Verification:
To Verify IPv6 is enabled or not can be checked by:

Verification by Interface Configuration

InterfaceConfiguration.png (6.61 KiB) Viewed 2010 times