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Groups > comp.os.linux.networking > #4090

Re: Captive portals ignore some URLs

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On 27 Sep 2017 15:38:02 GMT, in the Usenet newsgroup comp.os.linux.networking,
in article <oqggkq0eq4@news3.newsguy.com>, Charlie Gibbs wrote:

>I think we're wandering a bit far from the original intent of my
>posting.

Sorry 'bout that

>After searching the web for information on captive portals, I get the
>impression that _any_ HTTP request should be redirected, not just
>requests for certain URLs.

In general, yes.  As mentioned up-thread, this may be a firewall
issue where the router simply ignores the WiFi clients.

>Having said that, I checked my bookmarks and found that many of them
>make HTTPS requests, which can be causing some of my problems.
>However, I'm pretty sure that many times I've specifically typed
>"http://..." on the address bar and gotten no response.

ok

>If this gets redirected to "https://...", then something is getting
>in there ahead of the captive portal.

Yes and no - this MIGHT be your browser second-guessing you (and
knowing that HTTP is insecure and trying to save you from those
nasty h4X0rz, changing the request to HTTPS). but it also could be
the target web-site where the HTTP page auto-redirects to the HTTPS
page - only way to spot this is networking tools (packet sniffer or
looking at '/bin/netstat -atn' and looking at the destination port
number).

>We're back from vacation now, so I won't be using so many public
>wi-fi hot spots for a while.  But I'll try local ones when I get the
>chance and see whether I'm still having problems on HTTP (vs. HTTPS)
>requests.

Don't forget that each hot-spot may be set up differently.  What works
here, may not work there, much less at the other place  ;-)

One other thought - when I'm using a /graphic/ browser (rather than
my default 'lynx') it has a 'no-scripts' add-in, and that does
block a lot of stuff, INCLUDING redirects by those helpful proxies.

        Old guy

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Thread

Captive portals ignore some URLs Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2017-09-24 22:52 +0000
  Re: Captive portals ignore some URLs not@telling.you.invalid (Computer Nerd Kev) - 2017-09-24 23:08 +0000
  Re: Captive portals ignore some URLs not@telling.you.invalid (Computer Nerd Kev) - 2017-09-26 23:08 +0000
    Re: Captive portals ignore some URLs Moe Trin <ibuprofin@painkiller.example.tld.invalid> - 2017-09-27 03:53 +0000
      Re: Captive portals ignore some URLs Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2017-09-27 15:38 +0000
        Re: Captive portals ignore some URLs Moe Trin <ibuprofin@painkiller.example.tld.invalid> - 2017-09-27 19:11 +0000
  Re: Captive portals ignore some URLs Moe Trin <ibuprofin@painkiller.example.tld.invalid> - 2017-09-27 19:10 +0000
    Re: Captive portals ignore some URLs Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2017-09-30 00:42 +0000
      Re: Captive portals ignore some URLs Moe Trin <ibuprofin@painkiller.example.tld.invalid> - 2017-09-30 23:19 +0000
        Re: Captive portals ignore some URLs Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2017-10-02 15:33 +0000
          Re: Captive portals ignore some URLs Moe Trin <ibuprofin@painkiller.example.tld.invalid> - 2017-10-04 03:14 +0000

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