Merge pull request #449 from lduesing/enable_ipv6

Removed sysctl that tries to disable IPv6

Author: schurzi

roles/os_hardening/defaults/main.yml

@@ -236,9 +236,6 @@ sysctl_config:
   net.ipv6.conf.default.accept_redirects: 0
   net.ipv6.conf.all.accept_redirects: 0
 
-  # Disable IPv6 | sysctl-18
-  net.ipv6.conf.all.disable_ipv6: 1
-
   # Ignore RAs on Ipv6. | sysctl-25
   net.ipv6.conf.all.accept_ra: 0
   net.ipv6.conf.default.accept_ra: 0