WampServer

I installed wamp on my pc and when I clicked on localhost it gave me an Internal Server Error. Please help me.

What colour is your wamp manager icon in the system tray?

It's green and it says it's online, I can access my phpmyadmin, but not my localhost

Can you get to localhost using this address

http://127.0.0.1

Also what OS are you running

I can and I'm running windows 7

This is probably your problem! Read it carefully


Right, Windows as of Windows7 comes with the ability to use the IPV4 network address range and the IPV6 network address range and by default they are both turned on.

IPV4 addresses look like this: 123.321.10.234
IPV6 addresses look like this: 2001:0db8:85a3:0042:1000:8a2e:0370:7334

The IPV4 address for localhost is 127.0.0.1
The IPV6 address for localhost is ::1


See
[en.wikipedia.org]
[en.wikipedia.org]
[en.wikipedia.org]

However, Wamp's security as of now ( Feb 2013 ) is only configured to expect the IPV4 address range, but the Apache that is delivered with WAMPServer is aware of both the IPV4 and IPV6 address ranges and is happy to use either or in fact both.
I am not sure how Windows/Browsers decide which range to use but it appears to be fairly arbitrary, so you can get either.

This is the route of your problem.

There are 2 ways you can go to solve this small anomily. You can either ignore the IPV6 address range or change the security to include the IPV6 address range.


+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
KEEP COPIES OF ALL FILES CHANGED SO YOU CAN EASILY UNDO THESE CHANGES IF THEY DO NOT WORK FOR YOU

In fact copy c:\wamp to a backup location and then you can just replace
the whole folder if you have problems with your changes.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Option 1 is easier to do.
==============================================================

Option 1:
Ignore the IPV6 address range.


Use the wamp menus to edit these files where possible.

edit httpd.conf
change Listen 80 TO Listen 0.0.0.0:80
The 0.0.0.0 part tells Apache to only listen on IPV4 addresses.


edit c:\windows\system32\drivers\etc\hosts
If it exists, remove or comment out (comment is a # in colum 1) the line containing the IPV6 address for localhost >::1 localhost
(This makes the domain 'localhost' disappear from the IPV6 network, its existance is not hard coded anywhere it has to be mentioned in the hosts file to make it exists)
Make sure you have a line in the hosts file like this >127.0.0.1 localhost
(This makes the domain 'localhost' exists on the IPV4 network)

Wamps security should now work after a reboot. And

http://localhost

should now get you to wamps Apache installation. The exisiting security should also now work for phpMyAdmin,WebGrind and SQLBuddy


============================================================
Option 2:
Add the IPV6 address range to wamps security.

Again always use the wamp menus to edit these files where possible.

!!!! Make sure WAMP is set to 'Offline' before starting this part.


Now this is the dangerous bit!!!!! You must get these next 2 edits right. The text between the double quotes in C:\wamp\scripts\onlineOffline.php must match exactly that used in the httpd.conf file, so a copy and paste would be recommended. If you get this wrong the Online/Offline process will not work.

edit httpd.conf

Change
# onlineoffline tag - don't remove
Order Deny,Allow
Deny from all
Allow from 127.0.0.1

TO
# onlineoffline tag - don't remove
Order Deny,Allow
Deny from all
Allow from 127.0.0.1 ::1

Note we have added the ::1 IPV6 localhost address to the security, make sure there is a space between 127.0.0.1 and ::1.


Edit C:\wamp\scripts\onlineOffline.php
Change
$offlineText = "# onlineoffline tag - don't remove
Order Deny,Allow
Deny from all
Allow from 127.0.0.1";

TO

$offlineText = "# onlineoffline tag - don't remove
Order Deny,Allow
Deny from all
Allow from 127.0.0.1 ::1";

This makes sure that the Online/Offline process still works in WampServer. Make sure that this exactly matches your change above made to httpd.conf


Now edit each of the files
C:\wamp\alias\phpmyadmin.conf
C:\wamp\alias\sqlbuddy.conf
C:\wamp\alias\webgrind.conf

were ever you see >127.0.0.1 change it to >127.0.0.1 ::1
Ignore the lines that start with a #, as these are comment lines

This tells Wamp that whichever ip address from either address range you get for the domain localhost, is allowed to access the apache server.
Now whichever address range windows/browser picks for you when you use the

http://localhost

domain the security will allow you in.

edit c:\windows\system32\drivers\etc\hosts
In Windows8 you will probably see both domains in the file, but this is not guaranteed. When you are finished it should look like this.

127.0.0.1 localhost
::1 localhost

This makes the domain localhost appear on both the IPV4 and IPV6 address ranges.


When you get as far as accessing MySQL you will see that the 'root' user is configured so that it can be accesses from localhost and 127.0.0.1 and ::1 so that is all ready to go and needs no changes.

If you decide to change the password for the 'root' userid in mysql, make sure you use the same password for all the instances of root that exist in mysql. A complete MySQL userid is associated with a location, so it is not the same userid when you login from root@127.0.0.1 as when you login from root@::1. This is why there are 3 'root' userids in the default MySQL userid configiration.