Date: Sun, 8 Oct 2017 11:04:26 -0400 From: Mike <the.lists@mgm51.com> To: freebsd-questions@freebsd.org Subject: Re: forcing new dynamic ip address Message-ID: <259de481-2286-589f-ae18-8922d473813e@mgm51.com> In-Reply-To: <59DA19E8.5000602@gmail.com> References: <59DA19E8.5000602@gmail.com>
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On 10/8/2017 8:28 AM, Ernie Luzar wrote: > Hello List; > > I have a "home service" account from my ISP. The ISP issues an dynamic > ip address which has not changed in 12 years. > > My host has 2 NICs, one which is not used. I know if I plug the internet > cable into the un-used NIC and make the appropriate config changes and > reboot I will get a different dynamic ip address. > > Is there a simpler way to expire the lease to force the ISP dhcp to > refresh with a different dynamic ip address? > > The goal is to have a cron job that gets a different dynamic ip address > assigned to my host's front door every a week. > > Just another level of security to make it very hard for the script > kiddies from finding any open ports I may have. > > Thanks for the help. I have a few old NICs that i keep, not because I need to use them, but because i want to be able to use their MAC address. Then I use one of the MAC addresses in rc.conf, e.g., ifconfig_em0="DHCP lladdr yo:ur:MA:C:ad:dr:es" My ISP assigns a new IP address when the DHCP server sees a new MAC address.
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