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From Roman Buerkle <roman.buer...@stimme.de>
Subject mod_proxy Abbrüche
Date Thu, 28 Aug 2008 09:36:55 GMT
Hallo Community,

ich versuche gerade nen internen Exchange-Server (mit OWA und
ActiveSync) über einen Apache in der DMZ zu "proxyen". Folgende Konfig:

Client/Browser Port (443)  
  --> (443) Apache mod_proxy (80) 
  --> (80)  Exchange / OWA (Bsp: 10.1.1.1)

Ich verwende die aktuelle RHEL 5 mit Apache/2.2.3. Das ganze
funktioniert, aber ich bekomme sehr oft Fehler. Hier meine Konfigs:

<VirtualHost xxx:443>
   ...
   <IfModule mod_proxy.c>
        ProxyRequests Off
        <Proxy *>
                Order deny,allow
                Allow from all
                RewriteRule "^proxy:[a-z]*://[^/]*:25(/|$)" "-" [F,NC,L]
        </Proxy>
        ProxyPass / http://10.1.1.1/ keepalive=on
        ProxyPassReverse / http://10.1.1.1/
   </IfModule>
   ...
</VirtualHost>


Den "keepalive=on" habe ich gesetzt, da ich nach längerer Inaktivität
immer folgende Fehler bekomme: (die SSL-outputs habe ich weggelassen)

---- snipp Debug-Mode ----
[Thu Aug 28 11:23:27 2008] [info] [client 192.168.23.112] Connection to
child 6 established (server xxx:443)
[Thu Aug 28 11:23:27 2008] [info] Seeding PRNG with 136 bytes of entropy
....
[Thu Aug 28 11:23:27 2008] [info] Client requested a 'session-resume'
but we have no such session.
....
[Thu Aug 28 11:23:27 2008] [info] Connection: Client IP: 192.168.23.112,
Protocol: TLSv1, Cipher: DHE-RSA-AES256-SHA (256/256 bits)
[Thu Aug 28 11:23:28 2008] [info] Initial (No.1) HTTPS request received
for child 6 (server xxx:443)
[Thu Aug 28 11:23:28 2008] [debug] mod_proxy_http.c(54): proxy: HTTP:
canonicalising URL //10.1.1.1/owa/auth/logon.aspx
[Thu Aug 28 11:23:28 2008] [debug] proxy_util.c(1335): [client
192.168.23.112] proxy: http: found worker http://10.1.1.1/ for
http://10.1.1.1/owa/auth/logon.aspx?url=http://al-ug1-mxs.intern.stimme.de/owa&reason=0
[Thu Aug 28 11:23:28 2008] [debug] mod_proxy.c(756): Running scheme http
handler (attempt 0)
[Thu Aug 28 11:23:28 2008] [debug] mod_proxy_http.c(1662): proxy: HTTP:
serving URL
http://10.1.1.1/owa/auth/logon.aspx?url=http://10.1.1.1/owa&reason=0
[Thu Aug 28 11:23:28 2008] [debug] proxy_util.c(1755): proxy: HTTP: has
acquired connection for (10.1.1.1)
[Thu Aug 28 11:23:28 2008] [debug] proxy_util.c(1815): proxy: connecting
http://10.1.1.1/owa/auth/logon.aspx?url=http://10.1.1.1/owa&reason=0 to
10.1.1.1:80
[Thu Aug 28 11:23:28 2008] [debug] proxy_util.c(1908): proxy:
connected /owa/auth/logon.aspx?url=http://10.1.1.1/owa&reason=0 to
10.1.1.1:80
[Thu Aug 28 11:23:28 2008] [debug] proxy_util.c(2098): proxy: HTTP:
connection complete to 10.1.1.1:80 (10.1.1.1)
....
[Thu Aug 28 11:23:28 2008] [info] [client 10.1.1.1] (32)Broken pipe:
core_output_filter: writing data to the network
[Thu Aug 28 11:23:28 2008] [error] [client 192.168.23.112] proxy: error
reading status line from remote server 10.1.1.1
[Thu Aug 28 11:23:28 2008] [error] [client 192.168.23.112] proxy: Error
reading from remote server returned by /owa/auth/logon.aspx
[Thu Aug 28 11:23:28 2008] [debug] proxy_util.c(1773): proxy: HTTP: has
released connection for (10.1.1.1)
[Thu Aug 28 11:23:28 2008] [debug] ssl_engine_kernel.c(1770): OpenSSL:
Write: SSL negotiation finished successfully
[Thu Aug 28 11:23:28 2008] [info] [client 192.168.23.112] Connection
closed to child 6 with standard shutdown (server xxx:443
---- snipp ----

Sprich folgende Fehler treten auf:

-proxy: error reading status line from remote server 
-proxy: Error reading from remote server returned by

Wenn ich dann mehrfach den Browser reloade funktioniert es auch wieder.
Jemand nen Tipp wie ich das Ganze stabiler hinbekomme?

Danke schonmals

RoB



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