You should be able to do this from the administrative console of the router. Do you have access to that? Can you give us the details of what router you are using? We can help better if you provide more details.
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You shouls be able to make that change in the web server/control panel of your router.
For a list of default logins, check <a href="http://www.cirt.net/passwords?">here</a>
Good Luck!
-Flame
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Last Wiki Answer Submitted: November 17, 2008 2:26 am by Flame14,895 pts.
All Answer Wiki Contributors: Flame14,895 pts. ,
Technochic56,975 pts.
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Log into your router and change the lease duration for longer time, If you can specify the router model we can provide you the required commands.
Cheers
Yasir
Can you describe why you wish to increase the lease time? DHCP leases really have no effect on communications with the access point itself.