mod_proxy/974: ProxyRemote: "Could not connect to remote machine"

[Rainer Scherg <Ra...@rexroth.de>]

>Number:         974
>Category:       mod_proxy
>Synopsis:       ProxyRemote: "Could not connect to remote machine"
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    apache (Apache HTTP Project)
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Thu Aug  7 05:40:02 1997
>Originator:     Rainer.Scherg@rexroth.de
>Organization:
apache
>Release:        1.3.a1
>Environment:
Solaris 2.5.0  with gcc
Apache 1.3.a1
>Description:
Accessing a URL from an intranet via a ProxyRemote *sometimes* results in:

>>Proxy Error
>>
>>The proxy server could not handle this request. 
>>
>>Reason: Could not connect to remote machine 

Errorlog shows [because of the firewall/remote Proxy]:
>>[Fri Aug  1 16:52:11 1997] connect: Network is unreachable


A trace of the local network traffic [snoop] shows, that the apache server
wants to connect to the requested host **directly** and not via the remote
proxy (firewall). The requested URLs can be accessed [?], after killing and
restarting the httpd.

Could this problem related to #PR510?

One word to our configuration - it looks like:
>ProxyRequests On
>ProxyDomain     .rexroth.de
>NoProxy         [some full qualified intranet ip-adresses, no netmasks]
>NoProxy         .rexroth.de
>NoProxy         mpoint.mannesmann.de
# Firewall
>ProxyRemote     *  http://proxy1.mannesmann.de:8080

Full DNS name resolution is on the apache server available.

>How-To-Repeat:
www.sun.com
www.altavista.telia.com
>Fix:

>Audit-Trail:
>Unformatted: