Is there a way to create a filter that allows *all* traffic from any
computer on the internal network (LAN) to a specific outside IP address?

I know, it creates a hole through the firewall, but I'm looking for an
immediate short-term fix or turnaround to let certain traffic pass to a
specific server in another location.

I just can't seem to decipher what the filter should look like, if it's
even possible to set up, because the address is constant but traffic
could be on any ports.

Also, can I get any insight about opening up appropriate ports for Cisco
VPN client using UDP? The client doesn't seem to give me port
info/options if UDP is selected (as opposed to using TCP/IP which
indicates port number, but I don't have a choice in the client

These are two separate issues and the first is most critical.