Hi,

Globally anycasted 6to4 has outlived its usefulness.
Operational discussion: http://seclists.org/nanog/2018/Jun/268

Kind regards,

Job

diff --git etc/examples/bgpd.conf etc/examples/bgpd.conf
index a5fa7234a3c..77f610b9a06 100644
--- etc/examples/bgpd.conf
+++ etc/examples/bgpd.conf
@@ -118,6 +118,7 @@ deny from any prefix 127.0.0.0/8 prefixlen >= 8     # 
localhost [RFC1122]
 deny from any prefix 169.254.0.0/16 prefixlen >= 16    # link local [RFC3927]
 deny from any prefix 172.16.0.0/12 prefixlen >= 12     # private space 
[RFC1918]
 deny from any prefix 192.0.2.0/24 prefixlen >= 24      # TEST-NET-1 [RFC5737]
+deny from any prefix 192.88.99.0/24 prefixlen >= 24    # 6to4 anycast [RFC7526]
 deny from any prefix 192.168.0.0/16 prefixlen >= 16    # private space 
[RFC1918]
 deny from any prefix 198.18.0.0/15 prefixlen >= 15     # benchmarking [RFC2544]
 deny from any prefix 198.51.100.0/24 prefixlen >= 24   # TEST-NET-2 [RFC5737]
@@ -131,6 +132,7 @@ deny from any prefix 0100::/64 prefixlen >= 64              
# Discard-Only [RFC6666]
 deny from any prefix 2001:2::/48 prefixlen >= 48       # BMWG [RFC5180]
 deny from any prefix 2001:10::/28 prefixlen >= 28      # ORCHID [RFC4843]
 deny from any prefix 2001:db8::/32 prefixlen >= 32     # docu range [RFC3849]
+deny from any prefix 2002::/16 prefixlen >= 16         # 6to4 anycast [RFC7526]
 deny from any prefix 3ffe::/16 prefixlen >= 16         # old 6bone
 deny from any prefix fc00::/7 prefixlen >= 7           # unique local unicast
 deny from any prefix fe80::/10 prefixlen >= 10         # link local unicast

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