PC-Anywhere between HOME and WORK and a CISCO 1720 in between

I have a Cisco 1720 Router connected to a fractional T1 at my work.  I would like to PCanywhere to at least one computer over the internet, if not several different machines.  We have a static internet IP address.  We are using NAT.  My assumption is I have to do something fancy with an access-list.

I'm a Cisco newbie, but I think what I want to do is forward ports 5631 TCP and 5632 UDP to an internal IP address on our LAN.  The IP of the internal system is  I will have PC-Anyhwere listening on that machine.

I can do this with my Linksys router from Work to Home, Simple.  Ok, here is my running-config on the router.    

Here goes:

Current configuration : 1065 bytes                                  
version 12.1            
service config              
service timestamps debug uptime                              
service timestamps log uptime                            
no service password-encryption                              
hostname xxxxxxxxxxxxxx                  
enable secret xxxxxxxxxxxxxxxxxx                                              
enable password xxxxxx                      
memory-size iomem 25                    
ip subnet-zero              
ip name-server                            
ip name-server                            
interface Serial0                
 ip address                                      
 ip nat outside              
 service-module t1 timeslots 1-2                                
interface FastEthernet0                      
 ip address                                    
 ip nat inside              
 speed auto          
 no cdp enable              
ip default-gateway
ip nat pool ovrd netmask
ip nat pool natpool prefix-length 24
ip nat inside source list 1 pool natpool overload
ip classless
ip route
no ip http server
access-list 1 permit
dialer-list 1 protocol ip permit
dialer-list 1 protocol ipx permit
line con 0
 exec-timeout 0 0
line aux 0
line vty 0 4
 password spw1dar
no scheduler allocate

Thanks in advance, if anybody could recommend a good book also?

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You need to create a static port map:
Example your PC is that you want to access via PCAnywhere
ip nat inside source static tcp 5631 5631
ip nat inside source static udp 5632 5632

the best "book" is Cisco documentation either online or the CD that came with the router.

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deekyAuthor Commented:
Thank you so much.  Any suggestions about how to access more than one computer on our LAN from a remote location (HOME)???  Please don't say VPN then I'll really feel uncomfortable.  Baby-steps for me....

You would have to set your PCAnywhere hosts to use different TCP/UDP ports to listen on, then map statics to those ports. Example:

ip nat inside source static tcp 5631 5631
ip nat inside source static udp 5632 5632

ip nat inside source static tcp 5632 5632
ip nat inside source static udp 5633 5633

ip nat inside source static tcp 5633 5633
ip nat inside source static udp 5634 5634

System#1 uses default TCP 5631/ UDP 5632
System#2 uses 5632/5633
System#3 uses 5633/5644

I'm not that up on PCAnywhere internals, but if you read the help, I'm sure it will tell you how to setup the host to use different ports.
You need to setup a host to base from.  Internal ports are not changeable on PC Anywhere.  The first lines in the first solution are right.  Once inside you can pc anywhere to the list inside of the first session.

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