I can get proper response from http://plan9.bell-labs.com/sources/ by using mac/osx safari.


> 2016/10/03 2:42、James A. Robinson <jimr@highwire.org> のメール：

>
> So... Does Alcatel-Lucent have a problem with AppleWebKit
> users on principle?
>
> It looks to me as though my problem with browsing around
> under http://plan9.bell-labs.com/sources/ (and other subpages)
> is because the server doesn't like the User-Agent string:
>
> $ telnet plan9.bell-labs.com 80
> Trying 135.104.24.16...
> Connected to plan9.bell-labs.com.
> Escape character is '^]'.
> GET /sources/contrib/ HTTP/1.1
> Host: plan9.bell-labs.com
> Connection: keep-alive
> Cache-Control: max-age=0
> Upgrade-Insecure-Requests: 1
> User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36
> Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
> DNT: 1
> Accept-Encoding: gzip, deflate, sdch
> Accept-Language: en-US,en;q=0.8
>
> HTTP/1.1 200 OK
> Connection closed by foreign host.
>
> And here it is again w/o the User-Agent string:
>
> $ telnet plan9.bell-labs.com 80
> Trying 135.104.24.16...
> Connected to plan9.bell-labs.com.
> Escape character is '^]'.
> GET /sources/contrib/ HTTP/1.1
> Host: plan9.bell-labs.com
> Connection: keep-alive
> Cache-Control: max-age=0
> Upgrade-Insecure-Requests: 1
> Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
> DNT: 1
> Accept-Encoding: gzip, deflate, sdch
> Accept-Language: en-US,en;q=0.8
>
> HTTP/1.1 200 OK
> Server: Plan9
> Date: Sun, 02 Oct 2016 17:29:09 GMT
> Connection: close
> Last-Modified: Fri, 14 Mar 2014 22:14:11 GMT
> Content-Type: text/html
>
> [... proper body returned...]
>
> I tried playing around with the UA value and found that if I change
> AppleWebKit to something else such as AppleWebKis I get a
> response...
>
> Jim
>