Not signed in (Sign In)

Not signed in

Want to take part in these discussions? Sign in if you have an account, or apply for one below

  • Sign in using OpenID

Site Tag Cloud

2-category 2-category-theory abelian-categories adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry beauty bundles calculus categories category category-theory chern-weil-theory cohesion cohesive-homotopy-theory cohesive-homotopy-type-theory cohomology combinatorics complex complex-geometry computable-mathematics computer-science constructive cosmology deformation-theory descent diagrams differential differential-cohomology differential-equations differential-geometry digraphs duality elliptic-cohomology enriched fibration foundations functional-analysis functor galois-theory gauge-theory gebra geometric-quantization geometry goodwillie-calculus graph graphs gravity grothendieck group-theory harmonic-analysis higher higher-algebra higher-category-theory higher-differential-geometry higher-geometry higher-lie-theory higher-topos-theory history homological homological-algebra homotopy homotopy-theory homotopy-type-theory index-theory infinity integration-theory internal-categories k-theory kan lie lie-theory limit limits linear linear-algebra locale localization logic manifolds mathematics measure-theory modal modal-logic model model-category-theory monad monoidal monoidal-category-theory morphism motives motivic-cohomology nonassociative noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory pasting philosophy physics planar pro-object probability probability-theory quantization quantum quantum-field quantum-field-theory quantum-mechanics quantum-physics quantum-theory question representation representation-theory riemannian-geometry scheme schemes set set-theory sheaf simplicial space spin-geometry stable-homotopy-theory string-theory subobject superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory topology topos topos-theory type type-theory universal variational-calculus

Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.

Welcome to nForum
If you want to take part in these discussions either sign in now (if you have an account), apply for one now (if you don't).
    • CommentRowNumber1.
    • CommentAuthorAndrew Stacey
    • CommentTimeAug 14th 2017

    Older nLabians may or may not recall that the original URL of the nForum was, and that at times it was useful to have a back-up hostname for the nlab itself which was As I still rent the domain, I’ve kept these pointing at the nforum and nlab to avoid dead links.

    I’m in the process of doing a bit of housekeeping at mathforge, and in so doing I’m updating the and DNS entries so that they are CNAME not A entries. (If that means nothing to you, you probably should have stopped reading a while ago.) This is what they should have been originally: cname is like a symbolic link and means that if moves then these will follow it.

    For the record, once DNS hosts are updated, then they will alias as follows:

    • to
    • to

    If they should be otherwise, let me know.

    I’m pleased to see that the nLab/nForum are still going strong!

    • CommentRowNumber2.
    • CommentAuthorTobyBartels
    • CommentTimeSep 29th 2017
    • (edited Sep 29th 2017)

    Thanks for keeping these going! But right now I get a Cloudfare page complaining of a DNS resolution error for each of them.

    • CommentRowNumber3.
    • CommentAuthorTobyBartels
    • CommentTimeSep 30th 2017
    • CommentRowNumber4.
    • CommentAuthorMike Shulman
    • CommentTimeSep 30th 2017

    I get the error page too.

    • CommentRowNumber5.
    • CommentAuthorAndrew Stacey
    • CommentTimeOct 2nd 2017

    So do I, however a little bit of digging gets me the following:

    ~% host is an alias for has address has address has IPv6 address 2400:cb00:2048:1::681b:ab13 has IPv6 address 2400:cb00:2048:1::681b:aa13
    ~% host has address has address has IPv6 address 2400:cb00:2048:1::681b:aa13 has IPv6 address 2400:cb00:2048:1::681b:ab13

    So the alias is pointing to the right place. Doing whois, I get that it is registered to cloudfare.

    So cloudfare is at your end, not mine. It may well be that the type of redirect I’ve set up doesn’t work with cloudfare’s system in which case I can set it back to the other type of redirect, but then I need to keep an eye on your IP address to ensure that it tracks it. Or it might be that the alternative hostnames need registering with cloudfare so that it knows to expect them.

  1. Indeed, CNAME will not work.

    You should be able to use a one line .htaccess file to redirect to, without using IP addresses.

    • CommentRowNumber7.
    • CommentAuthoradeelkh
    • CommentTimeOct 2nd 2017

    Yeah, this is due to the way Cloudflare works. On the other hand, a 301 permanent redirect is probably the “correct” thing to do since the pages have, after all, “moved permanently”. If that’s not annoying for you to set up, Andrew, it would certainly be appreciated.

    • CommentRowNumber8.
    • CommentAuthorAndrew Stacey
    • CommentTimeOct 2nd 2017

    Yes, I can do a 301. That’s not a problem. I had hoped that a CNAME would work since then the requests get diverted at the DNS level and never reach my server. But I guess that the number of such requests is so small (being just a few links here and there) that it’s not an issue.

    I’ll get that set up in the next few days.

    • CommentRowNumber9.
    • CommentAuthoradeelkh
    • CommentTimeOct 2nd 2017

    Great, thanks in advance!