pfSense沒法更改LAN的IP

pfSense 2.5.0要修改LAN的IPv4位址時，出現下列錯誤訊息 

The Router Advertisements Server is active on this interface and it can be used only with a static IPv6 configuration. Please disable the Router Advertisements Server service on this interface first, then change the interface configuration.

點選 Service > DHCPv6 Server & RA時出現下面的提示訊息

The DHCPv6 Server can only be enabled on interfaces configured with a static IPv6 address. This system has none.

因而無法更改LAN的IPv4位置，處置方法如下

1. 暫時打開IPv6
1. 設定IPv6 Configuration Type為 Static IPv6
2. 給予IPv6位址 ::1
2. Service > DHCPv6 Service & RA
1. RA/LAN/Router Advertisement
2. 把Router mode設定成 Disable
3. 回到LAN設定，把IPv6給關閉
4. 這個在LAN設定內就可以更改IPv4位址了

參考資料

• Cannot save changes to LAN Interface - getting error - possible bug in v2.5?

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