IP Service with NAT

Hello ,
I want to be able to connect the router using www(port 80) only with the LAN and not by the internet
so I have open IP–Service–www
and this is the rules in the firewall

0   chain=srcnat action=masquerade to-addresses=0.0.0.0 

 1   chain=dstnat action=dst-nat to-addresses=10.0.0.100 to-ports=0-20 protocol=tcp dst-address=1.15.16.17 in-interface=ppp-out1 dst-port=0-20 

 2   chain=dstnat action=dst-nat to-addresses=10.0.0.100 to-ports=0-20 protocol=udp dst-address=1.15.16.17 in-interface=ppp-out1 dst-port=0-20 

 3   chain=dstnat action=dst-nat to-addresses=10.0.0.100 to-ports=23-8290 protocol=udp dst-address=1.15.16.17 in-interface=ppp-out1 
     dst-port=23-8290 

 4   chain=dstnat action=dst-nat to-addresses=10.0.0.100 to-ports=23-8290 protocol=tcp dst-address=1.15.16.17 in-interface=ppp-out1 
     dst-port=23-8290 

 5   chain=dstnat action=dst-nat to-addresses=10.0.0.100 to-ports=8292-65433 protocol=tcp dst-address=1.15.16.17 in-interface=ppp-out1 
     dst-port=8292-65433 

 6   chain=dstnat action=dst-nat to-addresses=10.0.0.100 to-ports=8292-65433 protocol=udp dst-address=1.15.16.17 in-interface=ppp-out1 
     dst-port=8292-65433

but if there is no computer connected(no answer for 10.0.0.100) , and I enter 1.15.16.17 on the browser - I get the router configuration page .
this is not good , how to change it ?