If it's for your site then there are a few ways you can do it.
1) Meta Refresh TagCODE
<meta http-equiv="refresh" content="0;url=http://www.mysite.com/forum">
Just place that code in your page, the number 0 is how many seconds it should take until it redirects to new page.
2) JavascriptCODE
<script type="text/javascript">
<!--
window.location = "http://www.mysite.com/forum"
//-->
</script>
3) PHPCODE
<?php
$URL="http://www.mysite.com/forum";
header ("Location: $URL");
?>
Im sure there are other ways, these are just a few.