forcing new dynamic ip address
luzar722 at gmail.com
Sun Oct 8 23:58:20 UTC 2017
> 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.
Thank you. This is the solution I was looking for. I tested it and it
works. But I have to first cycle the cable modem's power off/on to
signal the isp network that new hardware is being used and prepare to do
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