I did try that and forgot to post the issue I was having. Since I am using an archaic 204 device (Version: 5.4.0r28a.0 (Firewall+VPN)), the following command does not work. I just need eth4 in the command i assume but i still can't get it to work with the security command.
set security nat proxy-arp interface eth4 address 212.24.24.45
I looked at the command help set ?, and there is no 'security' option, only service. There is an 'arp' option to set arp entries.
ns204-> set security nat proxy-arp interface eth4 address 212.24.24.45 ^-----------unknown keyword security
Thanks for the help Steve.