UDP port forward

[fakrul]

I have a Cisco 2801 router with C2801-IPBASE-M IOS. I have already done a lot of port forward. Now if I want to add more udp port forward it give the following error:

Maximum UDP forwarding ports in use

Is there any limitation of UDP port forward? Can it be maximized by changing the router or ios?

 

[ADB100]

What protocols are you using that require you to forward more than a few UDP broadcasts?

Andy

 

[burtsbees]

I think he means static NAT with UDP, not broadcast traffic...post what you have so far...

Burt

 

[ADB100]

Ahh, I was thinking of IP Helpers and the global commands

ip forward-protocol udp xxx

If the range of ports is that big, why not forward the IP instead of the Layer-4 ports and use ACLs/Firewall to restrict the traffic?

Andy

 

[fakrul]

Yes, Andy is right. We are giving service to a software which need to forward 3 UDP port per client. There is already around 200 UDP port forwarded. I can't make them in range. The ports are not in serial. Andy, could you please clarify more about "Layer 4 ports and ACLs/Firewall" staff.

Fakrul

 

[ADB100]

could you please clarify more about "Layer 4 ports and ACLs/Firewall" staff.

What I suggested was to do an IP layer static NAT:

ip nat inside source static 10.1.1.1 192.168.10.10

However if you only have 1 external IP address?

Andy