[SOLVED] Apache2 RewriteCond not working, no log

MrUmunhum · 05-03-2016, 07:27 PM

Hi group,
I am attempting to configure my Apache web server to redirect any traffic for one IP to another IP. I have three IP addresses 10.1.1.12, 10.1.1.13 and 10.1.1.56. 12 and 13 are running on the same Raspberry Pi, running Raspbian. I'm using the Rewrite option of Apache with the following configuration:

Code:

LoadModule rewrite_module /usr/lib/apache2/modules/mod_rewrite.so

  RewriteEngine On
  RewriteLog "/var/log/apache2/rewrite.log" 
  RewriteLogLevel 5
 
  RewriteCond %{SERVER_ADDR} ^10.1.1.13
  RewriteRule .* http://10.1.1.56/%(REQUEST_URI) [R=301,L]

Using this command:

Code:

apache2ctl -M
[Tue Apr 26 01:25:25 2016] [warn] module rewrite_module is already loaded, skipping
[Tue Apr 26 01:25:25 2016] [warn] module info_module is already loaded, skipping
Loaded Modules:
 core_module (static)
 log_config_module (static)
 logio_module (static)
 version_module (static)
 mpm_prefork_module (static)
 http_module (static)
 so_module (static)
 alias_module (shared)
 auth_basic_module (shared)
 authn_file_module (shared)
 authz_default_module (shared)
 authz_groupfile_module (shared)
 authz_host_module (shared)
 authz_user_module (shared)
 autoindex_module (shared)
 cgi_module (shared)
 deflate_module (shared)
 dir_module (shared)
 env_module (shared)
 mime_module (shared)
 negotiation_module (shared)
 php5_module (shared)
 reqtimeout_module (shared)
 rewrite_module (shared)
 setenvif_module (shared)
 status_module (shared)
 info_module (shared)
Syntax OK

I can see that the rewrite module is being loaded. When I attempt 'wget 10.1.1.13', I get the index.html for 10.1.1.12 and nothing in the rewrite.log.

What am I missing?

bathory · 05-04-2016, 04:30 AM

Hi,

A couple of things:
You load twice mod_rewrite (and info_module if it matters).

Quote:

RewriteRule .* http://10.1.1.56/%(REQUEST_URI) [R=301,L]

You have an error in the RewriteRule. Replace %(REQUEST_URI) with %{REQUEST_URI}

Quote:

When I attempt 'wget 10.1.1.13', I get the index.html for 10.1.1.12 and nothing in the rewrite.log.

Rewrite should work. Since you're getting 10.1.1.12 instead of 10.1.1.56 or the initial 10.1.1.13, it could be a browser cache problem, so clear your browser cache before testing, or start a new session.
Re. logging it should work also,
I guess you're running apache-2.2.x, because RewriteLog is dropped in the new apache-2.4.x. So make sure that you restart apache after editing the config file(s)

Regards

MrUmunhum · 05-04-2016, 02:44 PM

Quote:

Originally Posted by bathory

Hi,

A couple of things:
You load twice mod_rewrite (and info_module if it matters).

You have an error in the RewriteRule. Replace %(REQUEST_URI) with %{REQUEST_URI}

Rewrite should work. Since you're getting 10.1.1.12 instead of 10.1.1.56 or the initial 10.1.1.13, it could be a browser cache problem, so clear your browser cache before testing, or start a new session.
Re. logging it should work also,
I guess you're running apache-2.2.x, because RewriteLog is dropped in the new apache-2.4.x. So make sure that you restart apache after editing the config file(s)

Regards

Thanks for the reply.

Your right about the loaded modules, don't think that is a problem, but commented out my loading.
Not a caching problem ( I believe ), using wget.
Changed '(' to '}', no effect..

Used "service apache2 restart" after making changes.

Code:

root:~; service apache2 restart
[....] Restarting web server: apache2[Tue Apr 26 20:30:06 2016] [warn] module info_module is already loaded, skipping
 ... waiting .[Tue Apr 26 20:30:09 2016] [warn] module info_module is already loaded, skipping
. ok

From Apache log on 10.1.1.12/13:

Code:

10.1.1.56 - - [26/Apr/2016:20:30:33 -0700] "GET /Test.php HTTP/1.1" 200 110052 "-" "Wget/1.16.3 (linux-gnu)"

From the error log:

Code:

tail  /var/log/apache2/error.log
[Tue Apr 26 20:29:44 2016] [notice] caught SIGTERM, shutting down
[Tue Apr 26 20:29:46 2016] [warn] module rewrite_module is already loaded, skipping
[Tue Apr 26 20:29:46 2016] [warn] module info_module is already loaded, skipping
[Tue Apr 26 20:29:47 2016] [notice] Apache/2.2.22 (Debian) PHP/5.4.45-0+deb7u2 configured -- resuming normal operations
[Tue Apr 26 20:30:07 2016] [notice] caught SIGTERM, shutting down
[Tue Apr 26 20:30:09 2016] [warn] module info_module is already loaded, skipping
[Tue Apr 26 20:30:09 2016] [notice] Apache/2.2.22 (Debian) PHP/5.4.45-0+deb7u2 configured -- resuming normal operations

Note: my server has the wrong date:

Code:

root:~; date
Tue Apr 26 20:45:21 PDT 2016

That should not have any effect on this problem.

Any other observation? This should work!

MrUmunhum · 05-04-2016, 06:20 PM

I changed the host server to my laptop and got it to work with this file:

Code:

  RewriteEngine On
  LogLevel info rewrite:trace1
  RewriteCond %{SERVER_ADDR} ^(10.1.1.57)
  RewriteRule ^.* http://10.1.1.13/%{REQUEST_URI} [R=301,L]

Also added this to my apache2.conf:

Code:

IncludeOptional conf.d/*.conf

The rewrite log entries are in errorlog:

Code:

[Wed May 04 19:10:00.780422 2016] [rewrite:trace1] [pid 4916] mod_rewrite.c(476): [client 10.1.1.57:37532] 10.1.1.57 - - [10.1.1.57/sid#557242b67390][rid#557242c1f9c0/initial] redirect to http://10.1.1.13//Test.php [REDIRECT/301]

Still failing on my R-Pi, raspbian.

bathory · 05-05-2016, 02:45 AM

Quote:

I changed the host server to my laptop and got it to work with this file:

RewriteEngine On
LogLevel info rewrite:trace1
RewriteCond %{SERVER_ADDR} ^(10.1.1.57)
RewriteRule ^.* http://10.1.1.13/%{REQUEST_URI} [R=301,L]

In the above rule, you use 10.1.1.57 and not 10.1.1.56 as in your OP, so verify the IP you want to redirect
Other than that, I agree that it should work.

MrUmunhum · 05-05-2016, 12:47 PM

Quote:

Originally Posted by bathory

In the above rule, you use 10.1.1.57 and not 10.1.1.56 as in your OP, so verify the IP you want to redirect
Other than that, I agree that it should work.

All together, I am using 4 IPs on two computers:

10.1.1.12 on my server
10.1.1.13 on my server, used to redirect.
10.1.1.56 on my laptop.
10.1.1.57 on my laptop, used to redirect.

There are two set ups I used to test:

request 10.1.1.13 which is redirected to 10.1.1.56, does not work
request 10.1.1.57 which is redirected to 10.1.1.13, which works.

MrUmunhum · 05-05-2016, 04:29 PM

I got it to work on my web server with this:

Code:

  
  Options +FollowSymLinks
<virtualHost test:80>
  RewriteEngine On
  RewriteLogLevel 1
  RewriteOptions Inherit
  RewriteLog "/var/log/apache2/rewrite.log" 
 
  RewriteCond "%{SERVER_ADDR}" "^10.1.1.13"
  RewriteRule ^.* http://10.1.1.56/%{REQUEST_URI} [R=301,L]
</virtualhost>

I guess the VirtualHost is a requirement for Apache 2.2.xx?

Note: For this example to work, I had to update /etc/hosts with this entry:

Code:

10.1.1.12 test