[ipv6-wg] Question about how I handle web sites in my IPv6 survey

Mark Prior via ipv6-wg <ipv6-wg at ripe.net> wrote:
    > The cases where it gets to a 200 are fine as that's "success" but there are
    > some failure modes that I can't really make my mind up on so having some
    > feedback would be potentially useful.

What percentage are these failures?  Maybe it's just noise.

    > In all these cases I see a site with A and AAAA records so I connect on port
    > 80 of the IPv6 address(es).

What if they have only AAAA?

    > 1. If the connection fails should I just report that or should I do anything
    > more? For example see if the site responds via IPv4.

The site could just be down/broken.   So checking with v4 kinda makes sense.

    > 2. If the connection succeeds (so I assume there should be a working IPv6
    > based web server) but after querying it with a HTTP/1.1 message sees the site
    > resets the connection (or fails in some other manner).

That sounds like it's behind a v6-capable/enthusiastic CDN, and the origin web site is broken.

    > 3. The connection succeeds as does the query and I get a 301 redirect to a
    > location that fails to connect (typically it's the https port but could be
    > another domain name). Again is this enough or should it do something
    > else?

I think that this is the biggest question.
I'd mark it as down for now.

    > Finally in some cases I'll get a HTTP status code such as 403, 429 or 503
    > rather than 200 and these are reported with a background of either light
    > green or light red depending on whether it occurred on an IPv6 or IPv4
    > connection. Should these be blue rather than a different green/red?

Keep them green/red.


--
Michael Richardson <mcr+IETF at sandelman.ca>   . o O ( IPv6 IøT consulting )
           Sandelman Software Works Inc, Ottawa and Worldwide




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