How do I open ports on PIX Firewall?

I have a PIX 515 Firewall with a basic operational configuration installed. I have no access lists configured and am basically setup to allow all LAN users access to www, ftp, etc. but no outside access into the LAN. I need to open 4 TCP ports (1812, 1813, 9081, & 9082) for all LAN users. I tried using the following access-list setup:

access-list acl_inside permit tcp 192.168.0.0 255.255.0.0 any eq www
access-list acl_inside permit tcp 192.168.0.0 255.255.0.0 any eq 1812
access-list acl_inside permit tcp 192.168.0.0 255.255.0.0 any eq 1813
access-list acl_inside permit tcp 192.168.0.0 255.255.0.0 any eq 9081
access-list acl_inside permit tcp 192.168.0.0 255.255.0.0 any eq 9082
access-group acl_inside in interface inside

Upon completing this, all users lost the ability to access the Internet, and I do not know whether or not this worked for the 4 ports in question because I had to remove the configuration changes to allow my users to receive their E-Mail and use the Internet.

Am I missing anything? Did I not enter in the commands correctly for what I am trying to do? Is using access lists the right way to do this or should I be doing something else? Your assistance is greatly appreciated!

 

Let me point you to an excellent how-to article Here (with links to other articles of theirs).

I think this will help you figure out not only this particular problem but give you a better feel for general care and feeding of PIX/Cisco access lists.

Please post back if this doesn't help you.

 

Here's a couple od additional websites to look at.

CISCO.com , the KB here will have many sample config's
routerie.com, Mostly routers but possibly some help.
securityie.com, There is a forum category for PIX.

good luck.