README.IPv6: Remove implementation detailscurrent-20210301

1 files changed, 0 insertions, 50 deletions

diff --git a/README.IPv6 b/README.IPv6
index 42b8664..fe4be5f 100644
--- a/README.IPv6
+++ b/README.IPv6
@@ -13,56 +13,6 @@ Features
 * DHCPv6 support for server controlled address configuration.
 * Fixed IP configuration of IPv6 interfaces.
 
-
-Implementation
---------------
-[This section can be removed from the final README.IPv6 as it relates to
- implementation by Pat rather than user level configuration]
-
-Pat should add a /lib/modprobe.d/ipv6.conf (preferred) or
-/etc/modprobe.d/ipv6.conf file to a package (probably network-scripts), with
-content:
-    options ipv6 autoconf=0
-    options net-pf-10 autoconf=0
-in order to disable IPv6 auto configuration (SLAAC) by default.
-
-Rationale: Should (possibly unknown to the end user) the network the host is
-connecting to employ SLAAC via Router Advertisement (RA), when the ipv6 module
-is loaded into the kernel the default is to accept RA packets and do auto
-configuration.  This would result in any interface (whether being configured for
-any IP networking or not) coming up with a globally routable IPv6 address.
-
-We considered this to be a bad idea since Slackware does not employ any
-firewalling by default, and most daemons will bind to an IPv6 address if it
-exists - possibly exposing services to the global internet where none is
-expected.  It is not possible to disable SLAAC or RA via sysctl at boot time -
-when sysctl is invoked in the Slackware boot process, the interfaces have not
-yet established their /proc/sys/net/ipv6/conf entries for configuration, so the
-setting would fail.
-
-Effects: Previous versions of Slackware followed the default behaviour when
-loading the ipv6 module, so would obtain a globally routable IP address via
-SLAAC should the network support it.  This behaviour would now change to the
-more secure default of not configuring network interfaces that the end user does
-not know about.
-
-Effects if not used: Although the USE_SLAAC[x] option in rc.inet1.conf can be
-used to disable stateless address auto configuration by RA for an interface via
-/proc/sys/net/ipv6/conf/$interface/autoconf, there is a chance that auto
-configuration will happen anyway because of a race condition between when the
-ipv6 kernel module is loaded and when USE_SLAAC[x] is applied by rc.inet1 - if a
-RA packet arrives during that time, the interface will be auto configured
-regardless of the USE_SLAAC[x] option.  Once that auto configured IP is attached
-to the interface, even disabling auto configuration via the /proc/sys/net
-interface will not automatically remove the IP from the interface.  A manual 'ip
--6 addr del' would need to be applied to remove that address.
-
-This can lead to the situation where the user thinks they have disabled
-stateless auto configuration using the USE_SLAAC[x] option in rc.inet1.conf, but
-an IP is still assigned in the brief time between module load and setting
-autconf off via /proc.
-
-
 Configuration
 -------------
 v6 IPs can be configured via SLAAC, DHCP6 or statically using the following new