Split up gateway pools and check them. $_POST['gateway'] has already been moved to the gateway box.
Check interface ip address, not the gateway!
Do not check an interface gateway if it is blank.
Third times a charm. Compare the interface gateway settings
Ticket #1039
Actually show gateway in question and change a to an.
Actually check interface gateway.
Do not allow operator to add a interface ip address as a gateway pool member. Routing loops are bad, mmmmmkay?
Also check policy based routing and see if the gateway is in use.
Compare against $pconfig and only check items if gateway is changing.
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