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 Helicon Tech : ISAPI_Rewrite 3.0
Subject Topic: Can I run both Rewrite1 and Rewrite3?
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Joined: 16 December 2011
Posts: 6
Posted: 16 December 2011 at 8:04pm

We have a testing machine (running Windows Server 2003/IIS6) with ISAPI Rewrite 1 installed for some legacy sites that still use httpd.ini.

I have recently installed ISAPI Rewrite 3 on that machine, so that we can also run a newer site that uses .htaccess.  However the redirects for this site don't seem to work at all.  Note that ISAPI Rewrite 1 is still installed and still seems to be working correctly.  Also, I have allowed Rewrite3 in Web Service Extensions, but I'm not sure what else I need to do to get it to work on this machine.

Do I need to uninstall the older version of Rewrite?

Note: We are currently using the .htaccess file mentioned above on other servers that have only Rewrite3 installed, and it works fine there.

Edited by bjaffee - 16 December 2011 at 8:04pm
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Joined: 01 October 2003
Online Status: Online
Posts: -160
Posted: 19 December 2011 at 5:38am


1) Yes, please, uninstall the old version.
2) ISAPI_Rewrite 3 has also quite difficult syntax. You can see examples in FAQ and examples section.

In case you have a lot of rules you may request Premium Support Plan. We can help you to replace old rules with new ones.

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Joined: 16 December 2011
Posts: 6
Posted: 19 December 2011 at 3:01pm

It still doesn't work:

There was nothing in add/remove programs available for ISAPI_Rewrite 1, so I did the following:  Removed  ISAPI_Rewrite from the ISAPI filters option in IIS; In Web Service Extentions in IIS, disallowed ISAPI_Rewrite; Removed the ISAPI_Rewrite directory from the c:\Program Files\Helicon directory.

I'm not sure what else I need to do to uninstall it version 1.

Note that we currently have ISAPI_Rewrite 3 running on over a dozen other servers (all running IIS 7.5 as opposed to IIS6 in this case), and they work fine.  So, the problem isn't with syntax in our .htacess file.
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