We own a block of 5 ips. Our primary ip (95.111.111.114) is assigned to the uc520's fast ethernet 0/0 port. This uc520 has only one fast ethernet port for WAN use running IOS 12.4 with advanced services. Due to the nature of Cox Internet, in order for a public IP to be seen as active and in use, it has to be ARP cached in the modem you own. We have no problems with the 114 IP as it's the active NATed IP and assigned directly to the WAN interface. The problem arrises when we want to use the other IP's in our block (95.111.111.115-118). I have tried doing one to one nats like this:
ip nat inside source static 192.168.10.5 95.111.111.115
but it won't work. I've done a show ip nat translations and I see the router creating them, but I can never get internet on that public ip from that internet lan ip. I know this is correct and should work because I've used the same command with our other T-1 internet provider and it works perfectly.
What do you suggest I try to get these other public IP's working?
thanks for any help you can provide.
