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Is there a way to reduce the lease time of the WAN IP address in DD-WRT? It seems like this should be an easy setting to find, but I'm not seeing it anywhere in the settings.

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WAN lease time is controlled by your ISP not your router. DD-WRT won't have a configuration for it. I haven't seen a DHCP server that allows the client to specify lease time.

Manually releasing the lease and renewing may not get you a new IP address. The server usually has a database of the addresses assigned, and will try to reassign the same address.

Some ISPs will rotate addresses over time to discourage people from running servers. Trying to forcibly change the IP address frequently may attract unwanted attention to your activities.

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true, but i'm thinking he just wants a release/renew cycle – aking1012 Dec 10 '10 at 16:12
@aking1012 Considered that but frequent release/renew doesn't have much value unless you are trying for a new IP address. – BillThor Dec 10 '10 at 21:16
My ISP actually suggested reducing the lease time as a troubleshooting step to an intermittent connection loss issue I've been having. I didn't think I was able to do that, but couldn't find any documentation that stated it wasn't possible. Thanks for the answer. – Andrew Hampton Dec 13 '10 at 17:24
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