FortiGate
FortiGate Next Generation Firewall utilizes purpose-built security processors and threat intelligence security services from FortiGuard labs to deliver top-rated protection and high performance, including encrypted traffic.
HiralShah
Staff
Staff
Article Id 278769
Description This article details steps that need to be taken to ensure everything else in a FortiGate setup works as expected after changing the WAN IP.
Scope All supported FortiGate firmware.
Solution

To change the WAN IP to a new IP address make sure to do changes as below:

 

Go to Network -> Interface -> WAN interface and provide a new IP address.

 

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Under Network -> Static routes, provide a new gateway IP address on the static route.

 

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Also, if SSL VPN is used, make sure the FortiClient -> remote access -> remote gateway field has been changed with the new WAN IP address.

 

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If site-to-site VPN is configured, make sure to change the remote IP address of the remote side of the tunnel to the new WAN IP.

 

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Perform this process during a maintenance window to avoid impairing traffic.

 

Contact TAC for additional support if issues still occur following the WAN IP change.

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