i have the following hardware :Vigor2600V series annex A # Firmware Version : 255RC5_UK

I have set up my ADSL on the router and configured it on a local IP address of 192.168.2.254

this is connected to my server which has an ip address of 192.168.2.253
my server acts as an email server and hosts my web site.

the server has a second network card - connecting to the LAN and is allocated as 192.168.1.111

I have 8 pcs connected on a different network card on the server and they are allocated a range of 192.168.1.100- 110

My locals pc's gateway is the 192.168.1.111, everything is working fine.

issue i have and would like help is i have been allocated 3 fixed ip addresses.

81.142.48.225
81.142.48.226
81.142.48.227 - my MX records are routing to this and intern to my server
working ok

i would like to allocate the public ip address 81.142.48.266 to a local IP address of 192.168.1.109

can this be done ?

if so can someone help ?