Timmy, is your phpBB in the root folder of your site, or do you have a homepage with a link to your phpbb? If the latter is the case, simply change the link from /phpbb/ to /phpbb/viewforum.php?f=1 That will make the entry point to your phpbb the viewforum page from forum 1.
If the former is the case things are a bit more tricky. You may consider a basic meta redirect or you could do an htaccess url rewrite, but this is a bit more tricky than a metatag redirect. If you don't mind sacrificing your phpbb indexpage you could simply rename it index2.php to keep it as a backup and put up a new index.php page in your phpbb root folder with code something like this:
<html>
<head>
<META HTTP-EQUIV="REFRESH"
CONTENT="0;URL=http://yoursite.com/phpbb/viewforum.php?f=1"/>
</head>
</html>
That should do the trick, although I am sure there are smoother ways of doing it, such as using an htaccess rewrite condition - in your root folder htaccess file:
Options +FollowSymLinks
RewriteEngine on
RewriteBase /
RewriteCond %{REQUEST_URI} /phpbb/index.php
RewriteRule .* /phpbb/viewforum.php?f=1
Using the above method requires that your site is on an Apache server with mod_rewrite turned on. If you want to test that you can copy this code:
<?php
phpinfo();
?>
name it phpinfo.php, put it in your root folder and call it in your browser. You will get a wealth of information about your server configuration. Search the page for mod_rewrite. If you find it chances are you should be able to tell wheteher or not it is available to you.
Obviously, substitute all instances of phpbb with the name of your phpbb folder.
Hope this helps.:)
Sincerely,
Joe