Hello Job,

Im happy with that, (not that i have a say either way ;) )

I was wondering would it be worth while to add rule to  limit on the aspath
length that would be accepted in the examples/
bgpd.conf  file also

I typically reject prefixes on my ebgp routers if the prefix  has an as
path length >

I was just wondering if you / the community think there is any value to
that being added to examples ...

Or am i being overly restrictive ?


On Thu 21 Jun 2018, 16:52 Job Snijders, <j...@openbsd.org> wrote:

> 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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