Noted. So I guess the only way to properly secure the network is to have seperate physical media. Thanks
From: Peter Bieringer
Subject: Re: [ds6] Disabling link local IPv6 addresses
Sent: Jan 10, 2012 10:08 PM
Am 10.01.2012 11:00, schrieb firstname.lastname@example.org:
> I've been using radvd to set up a group of clients using RA broadcasts. I also have a group of client PCs using static IPv6 in a different ::/64 subnet altogether but on the same physical network. The two networks have to remain separate for security reasons.
> The problem I'm having is that clients on the two separate networks can still "see" each other through the automatic link-local (fe80:
addresses. I've added the line IPv6_AUTOCONF=no to network& my ifcfg-* files but I can't seem to stop this behaviour.
You mean you want to run 2 independend IPv6 network on the same physical
> Any hints, tricks, hacks, gotchas?
I suggest to use at least VLANs, because killing link-local address can
kill neigbor and router detection.
But neither removing link-local nor VLAN will really increase security,
an unfriendly client can sniff on the network and configure itself a new
static IPv6 address (and in case the VLAN ID also), as long as broad- or
allhost-multicast are running on the link.
Use local firewalling and permit only the link-local addresses of the
participating clients can help you a little bit, but even link-local
addresses can be faked (e.g. changing the MAC address on an interface).
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