Cisco 677 and NAT forwarding to multiple hosts

[Geddeth]

I am currently forwarding certain portnumbers to various internal IP adresses, but from time to time, I'd like for serveral hosts on the LAN to be able to receive communication on a certain port, and it's a drag to have to reprogram the router every time.

So: Is it possible to e.g. forward all incoming traffic on port 21 to the entire LAN, or just to several define local IP adresses? So that I can run an FTP server from several different machines (at seperate times, of course).

Thanks,
/geddeth

 

[dtabera]

Maybe you can try broadcast forwarding this way

interface Ethernet0
ip address 192.168.90.253 255.255.255.0
ip directed-broadcast
no ip proxy-arp
!
!
interface Serial0
no ip address
ip helper-address 192.168.90.255
ip directed-broadcast
no ip proxy-arp
encapsulation frame-relay IETF
logging event subif-link-status
logging event dlci-status-change
frame-relay lmi-type q933a
!
interface Serial0.1 point-to-point
ip address 10.10.20.90 255.255.255.0
ip helper-address 192.168.90.255
ip directed-broadcast
frame-relay interface-dlci 16
!
!
ip classless
ip forward-protocol tcp 21

This way, all incoming ftp packets on Serial interface will be broadcasted to LAN. You will not have to broadcast tcp/20 traffic, as is established after the connection in 21 port.
I have never used it with NAT, though.