I have a newbie question involving the following scenario:
WAN Router with 2 WIC cards are connected to 2 ISPs:
Internal network > Firewall > WAN Router (ISP1 18.104.22.168/24, ISP2 22.214.171.124/24)
Publicly available servers are currently nat'ed by the firewall to one ISP's subnet, eg. 126.96.36.199. But if that ISP goes down, we have to manually change the nat rule to switch to the other ISP. The site is running BGP (don't think it's advertising anything). Is there a better way to maintain connectivity if one ISP goes down?
Thanks in advance.