Hello.
I've been invited to visit a web site and I couldn't see it.
Bypassing squid would solve the problem, so I made some some researches
and saw that adding "forwarded_for transparent" to my config would do.
I'm wondering what the reason might be...
tcpdump showed that:
1) initial connection to http:/www.xxxxxxx.com yields a 302 redirect to
http:/www.xxxxxxx.com/md;
2) so a second request goes out to http:/www.xxxxxxx.com/md and yields a
301, again redirecting to http:/www.xxxxxxx.com/md/ (notice the last slash);
3) finally a request goes out for http:/www.xxxxxxx.com/md/ and here's
where a difference arises between a direct connection and one through
Squid (without "forwarded_for transparent").
The answer to a direct connection (or to Squid with "forwarded_for
transparent") is:
HTTP/1.1 303 See other
Date: Mon, 30 Jan 2017 09:56:18 GMT
Server: Apache
X-Powered-By: PHP/5.3.29
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Set-Cookie: PHPSESSID=wwwwwwwwwww; path=/
Set-Cookie: yyyyyyyyyyyyyy=zzzzzzzzzzzzz; path=/; HttpOnly
Location: http://www.xxxxxxx.com/md/it/
Content-Length: 0
Connection: close
Content-Type: text/html; charset=utf-8
The answer to Squid without "forwarded_for transparent") is:
HTTP/1.1 200 OK
Date: Mon, 30 Jan 2017 09:33:51 GMT
Server: Apache
X-Powered-By: PHP/5.3.29
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Set-Cookie: PHPSESSID=vvvvvvvvvvvvvvvvvvvvvv; path=/
Content-Length: 0
Keep-Alive: timeout=15, max=98
Connection: Keep-Alive
Content-Type: text/html
The site is a commercial one and, altough it features a reserved area, I
don't see any point in loosing visibility to corporate users.
Also the webserver belongs to a famous ISP which should also hosts
thousands of other sites, so I guess it should have nothing fancy.
Anyone can shed some light on this behaviour?
Is this Squid's fault (I don't think so, but I'll just ask)?
Is this a known bug in some version of Apache or PHP or whatever?
Is it dangerous to keep "forwarded_for transparent" in my config?
bye & Thanks
av.
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