[CentOS] symbolic links seemingly not browseable

Hi all,

I'm sure this is a quick fix, but I've not found the answer yet.

On a fresh install of CentOS5, I need to use an alternate port for ftp. 
Currently vsftpd wants the standard port which is in use by another
system on my NATted network.  So...how does one go about reconfiguring
vsftpd to do this?  I've looked in /etc/vsftpd/vsftpd.conf to no avail. 
In my Slackware days, proftpd was able to be configured by editing a
single line in the .conf file.  I'm hoping it's that easy using CentOS .

Thanks in advance for any/all suggestions. (and advance apologies for
more questions, as I know they're coming!)

~Ray