Howto Assign Multiple Public IP Addresses on Juniper SSG
Sharing Internet with Multiple public IP from same ISP:
ISP Router running in bridge mode
Juniper SSG5 eth0/0 doing ppoe to connect ADSL.
ISP assign Public IP block as: 188.8.131.52/29
Network range will be: 184.108.40.206- 220.127.116.11. Using /29 on 2 untrust interface will give you an error, IP overlapping. To use these IP on 2 untrust interface we will need divide these to 2 IP block of /30
Network range: 18.104.22.168 – 22.214.171.124
Network range: 126.96.36.199 – 188.8.131.52
on the Juniper you will need to go to Network > Zones > Edit the untrust interface and remove tick mark from ‘Block Intra-Zone Traffic’ and in Network > Routing > Routing Entries destination route 0.0.0.0/0 going to interface that doing ADSL as the Gateway.