Dears
I need to implement Peplink balance 580 after the Sophos firewall how to avoid double NAT.
Sophos WAN IP 85.200.62.5
Sophos LAN IP 192.168.8.1 (already NAT here)
PEPLINK BALANCE 580 WAN 192.168.8.10 (IP Forwarding Mode)
PEPLINK BALANCE 580 WAN 192.168.24.1
I am quite new with sophos and peplink please help
How many WAN IPs do you have? If you have a spare you can use Proxy ARP on the Sophos to use one of the spare public IPs on the Peplink WAN.
https://support.sophos.com/support/s/article/KB-000035927?language=en_US#Configuring-Proxy-ARP
Sophos will be after the ISP modem and modem have a single WAN IP
I have an ISP modem, and it is already doing NAT. However, I requested a new ISP modem, which can be a bridge mode but will take time.
Attached is the diagram
