Question : PIX 501

I have a client who has PIX 501 running version 6.3 IOS.  I have an external IP for a company that needs to access a server with an internal address.  What is the CLI to allow this in v6.3?

Answer : PIX 501

It sounds like you want to allow a static mapping through for outside access.  You need to create a staic mapping:

static (inside,outside) <EXTERNAL IP> <INTERNALIP> netmask 255.255.255.255 0 0

Then add an entry to your current ACL tied to your outside interface:

access-list outside permit tcp (or UDP or IP) any host <EXTERNAL IP> eq <PORT NEEDED FOR ACCESS>