is CERNET part of the Internet?

I'm trying to figure out whether CERNET http://en.wikipedia.org/wiki/CERNET
is part of the official Internet, or is behind the Great Firewall where
access to invididual networks on the public Internet must be explicitly
granted. Anyone in the know?

a message of 5 lines which said:

the official Internet

I wasn't aware there is an official Internet. Where is it?

I'm trying to figure out whether CERNET http://en.wikipedia.org/wiki/CERNET
is part of the official Internet,

There is no 'official Internet', there is a 'view on the Internet'.

Note that if you would do an eyeball count the 'official' one would be
the Chinese one as there are potentially more people looking at it there...

To answer your subject line though: yes CERNET is part of the Internet,
they have IP addresses from IANA through their RIR APNIC and their
website be reached from most locations on the general thing called the
Internet.

CERNET is IPv6-only for large portions though and those are not behind
the GFW as they do not do IPv6 for that (yet at least as far as it is
known).

or is behind the Great Firewall where
access to invididual networks on the public Internet must be explicitly
granted. Anyone in the know?

Everything in China is behind their content filter. Only parts of Hong
Kong are sometimes not yet. As far as it is known they do not 'allow'
things but block specific things.

I suggest you go through http://freehaven.net/anonbib/ for a good read
about the various things that are known about the thing we call GFW.

Greets,
Jeroen

Here's one of their many v4 networks from level 3:

BGP routing table entry for 202.38.64.0/18
Paths: (2 available, best #1)
  10026 4538 4538 4538 4538, (aggregated by 4538 202.112.60.1)
  AS-path translation: { APNIC-AS-3-BLOCK CERNET-BKB CERNET-BKB
CERNET-BKB CERNET-BKB }
    edge2.SanJose3 (metric 26107)
      Origin IGP, localpref 100, valid, internal, atomic-aggregate, best
      Community: North_America Lclprf_100 Level3_Customer
United_States San_Jose 10026:4200 10026:32344 10026:40104
      Originator: edge2.SanJose3
  10026 4538 4538 4538 4538, (aggregated by 4538 202.112.60.1)
  AS-path translation: { APNIC-AS-3-BLOCK CERNET-BKB CERNET-BKB
CERNET-BKB CERNET-BKB }
    edge2.SanJose3 (metric 26107)
      Origin IGP, localpref 100, valid, internal, atomic-aggregate
      Community: North_America Lclprf_100 Level3_Customer
United_States San_Jose 10026:4200 10026:32344 10026:40104
      Originator: edge2.SanJose3

Hi,

Well, they are part of -my- Internet. I'm Bill Manning and I approved this message.
(there, its offical too)

Since you raise the issue of "firewall" - I'll raise you one and ask;

"Are networks behind NAT/ALG or that use RFC 1918 or the v6 equivalent address space,
part of the 'Internet' or are they in networks where access to addresses/service ports
must be explicitly granted?"

/bill

"Are networks behind NAT/ALG or that use RFC 1918 or the v6 equivalent
address space,
part of the 'Internet' or are they in networks where access to
addresses/service ports
must be explicitly granted?"

RFC4084 (Terminology for Describing Internet
Connectivity)<http://tools.ietf.org/html/rfc4084>,
IMHO, does a decent job of trying to enumerate/unpack these kinds of
questions.
I'm sure it's not uncontroversial, but may provide some common vocabulary.

Tony

Well the answer is Yes and No.

Content filter is not a reason you can call it non-internet.
If you think it is not internet because of content filtering, think again,
you have to exclude whole China from Internet.

The real problem CERNET is not completely part of Internet is following:

CERNET policy is FREE of charge for it's members, as long as the traffic is
in their 'FREE networks' eg most of IP Blocks in China and some
Universities in the world.
However, outbound traffic to Non-free networks eg most blocks outside China
will be charged.
If you download a webpage from a China University, they are actually going
to pay for it for your traffic.
So some members tend to choose to block their visibility to 'Non-Free
networks'.
Of course major Universities won't do that but imagine a high school, they
may very possibly do that.

That is the main reason CERNET is not completely Internet.

All* of Hong Kong and Macau are not behind the chinese firewalls.

*some hong kong and macau traffic *may* traverse mainland china and
hence be firewalled, but the networks themselves operating in these
two cities/regions do not have filtering per se.

"The largest equivalence class in the reflexive transitive symmetric closure of the relationship 'can be reached by an IP packet from'" -- Seth Breidbart.

Cheers,
-- jra

Most networks have some sort of firewall (hopefully...)

Isn't CERNET kind of similar to Internet2/NLR?
Members own their network
Free to join
Serve education&research community
Members encourage their users to use "the free network" instead of public
network when possible

Please correct me if I am wrong.

Yang