redirect WP post from one subdomain to WP page on domain subdirectory using htaccess- file

Question

I got a issue with my htaccess-file. I learned a thing or two when it comes on rewriting through the htaccess-file, but this one is really keeping me awake. Hopefully one of you can help me solve with this matter. The situation is the following.

I want to redirect some specific WP blog posts (permanently) from a subdomain to some specific pages on this WP main domain subdirectory. I'm using a WP Multi subdomain website. Here's what I mean:

sub1.domain.com/postname needs to be redirected to: domain.com/sub1/pagename

I can't figure out how to get this done. Here's how my WP htaccess- file that's located on the root of this subdomain normally looks like:

#BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

RewriteRule . /index.php [L]
</IfModule>
# END WordPress
<Files 403.shtml>
order allow,deny
allow from all
</Files>

I hope someone can help me with this matter. It will truly help me. Thanks in forward!

Greets, Marc

Answer 1

Add the following HTTP_HOST rule just before your wordpress rules.

RewriteEngine On
RewriteBase /

RewriteCond %{HTTP_HOST} ^sub\.domain\.com$ [NC]
RewriteRule ^postname/?$ http://domain.com/pagename [R=301,NC,L]

RewriteRule ^index\.php$ - [L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d    
RewriteRule . /index.php [L]

---

To redirect sub.domain.com to domain.com/subdir , you would use

RewriteCond %{HTTP_HOST} ^sub\.domain\.com$ [NC]
RewriteRule ^(.*)$ http://domain.com/subdir/$1 [R=301,L]