Apache mod_rewrite: force www only if not in localhost

Question

I have the following in my htaccess to force the www in URLs:

RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]

How do I only apply this if not on localhost? Is there some sort of if-condition I can put? Right now, I'm getting something like this: http://www.localhost/ ...

score 68 · Accepted Answer · answered Apr 19 '12 at 15:27

68

RewriteCond is already your "if-condition". Just add another one:

RewriteCond %{HTTP_HOST} !=localhost
RewriteCond %{HTTP_HOST} !^www\.
RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L]

answered Apr 19 '12 at 15:27

LazyOne

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Or use RewriteCond %{REMOTE_ADDR} !127.0.0.1 as an alternative. – Jan Apr 19 '12 at 18:23
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RewriteCond %{REMOTE_ADDR} !=127.0.0.1 to be exact! – George Mar 04 '14 at 15:59
4

If IPv6 is enabled, localhost may resolve to `::1`, so you might want to add this: `RewriteCond %{REMOTE_ADDR} !=::1` – Andreas Ley May 13 '14 at 12:16
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Why can't I use space here? `!= localhost` – Jens Törnell Mar 26 '18 at 13:22

score 29 · Answer 2 · answered Dec 01 '14 at 03:59

29

I added all these:

RewriteCond %{HTTP_HOST} !=localhost
RewriteCond %{HTTP_HOST} !=127.0.0.1
RewriteCond %{REMOTE_ADDR} !=127.0.0.1
RewriteCond %{REMOTE_ADDR} !=::1

answered Dec 01 '14 at 03:59

Kiran Madipally

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Note that you can't use a space after `!=` otherwise you will get a 500 internal server error. – Donald Duck May 09 '23 at 21:06

score 5 · Answer 3 · answered Jun 29 '18 at 14:29

5

If you're using a port other than 80 (e.g. localhost:8080) you might need to add it to the regex too:

RewriteCond %{HTTP_HOST} !^localhost(?::\d+)?$ [NC]
RewriteCond %{HTTP_HOST} !^127\.0\.0\.1(?::\d+)?$

answered Jun 29 '18 at 14:29

Gus

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Apache mod_rewrite: force www only if not in localhost

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