Re: [gentoo-user] [Not specifically Gentoo] Forcing a new IP address with DHCP

[Ryan Tandy]

>
>
>Good afternoon,
>
>

It's evening here, but I get the general idea. :)

>I have a Linksys WRT54GS router running openWRT firmware that gets its
>IP via DHCP from my ISP. That's all working fine. I also have an account
>with dyndns.org that is supposed to get updated when my IP changes. This
>is where I've screwed something up because it's wasn't. I think I have
>it configured properly now, but won't know until my IP changes again.
>
>

In the configuration on the dyndns website, enter an IP for your entry 
that you know is wrong.  Wait the interval you configured and see if it 
updates to the correct one.  Also, there should be an option somewhere 
to force your dyndns client to update immediately, but I'd recommend 
waiting the interval just to make sure that works too.  Maybe turn it 
down to 5 minutes or something to reduce the wait. ;)

>I'm going on the road for a few weeks, and will need to access my home
>machine, so I'd like to test this out.
>
>So, first off, is there a way for the network startup script to say
>
>"Expire this lease and give me a different IP address"?
>
>
man udhcpc

I use the ISC dhclient (net-misc/dhcp), which can be signalled to 
release and renew its IP lease.  There should be an option in any client 
to release its IP lease and renew it again, but your ISP will usually 
give you the same one anyway if it's available - and there's no way to 
tell it not to do that.

>If not, is anyone here familiar with openWRT, udhcpc, ez-ipupdate and dyddns.org
>configurations? I'd be glad to take this offline if it's too un-Gentoo
>specific.
>
>
no, no, no, and yes.  I run ddclient on my Gentoo router to update my 
dyndns entry (tarpman.homelinux.com).

>Thanks,
>John
>
>
>
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