susie

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Hi everyone.

I reciently installed ddclient and got a free dyndns dynamic domain. ddclient is configured and seems to be running fine though I learned it likes things in a specific order in the config file.(I needed to shift where uid/pwd was located)

The problem I'm having is my isp is rotating ip's. That is why I got the domain to try to deal with things that need to point at my machine. However I'm wondering is there a way to auto update the /etc/hosts file. Now I'm using dhcp and it seems to make little diffrence what the actual ip is there but it bothers me all the same that due to rotation it's not accurate. Until reciently my ip would stick for the longest time. Probably about a year. Now sometimes on reboot or halt then boot it gives me a new ip. So I'm wondering what I should do to my /etc/hosts file and if there is anyway to auto insert into it the current ip.

right now it pretty much just says the following:

127.0.0.1 localhost.localdomain
[my current ip I just fed to it] localhost [my machines name]

now I know I should probably at least change the second line's localhost to my dyndns. But I'm wondering if ddclient can grab and submit to dyndns.org my most current ip can't something do similar for those of us stuck rotating ips by outputting to our /etc/hosts? I'm also wondering if simply changing that second line above as far as localhost goes will work proper if I don't have a correct ip addy infront of it.

Thanks in advance guys

- - Susie

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Arienadean/Celticess
http://arienadean.tripod.com

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andrew farmer

No - if your IP is dynamic, you shouldn't be using /etc/hosts. hosts
should only be used for your address when:

- the address configures special addresses (127.0.0.1, 255.255.255.255,
etc)
- the address is on a local net (192.168.x.y, 10.x.y.z, etc) and is not
dynamic
- the address can be reasonably expected to never change (66.35.250.150
:-)

You shouldn't need an entry in /etc/hosts if you're using a dynamic IP
service. If you want an abbreviated hostname (e.g. mymachine instead of
mymachine.dynamichosting.service), edit /etc/resolv.conf and add a
"domain dynamichosting.service" line.

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gbloomberg

Don't take this wrong but I'm failing to see what your problem is. I
think other s maybe as well. AFAIK the /etc/hosts file is only
locally significant. I use a dynamic dns client.. (different than
yours) but I don't see the significance this has on Remote users. Is
something not working they way it should or just not the way that you
thought that it should?

I have two interfaces. Eth0 public/dhcpcd address.. Eth1 private. my
"/etc/hosts" file:

127.0.0.1 localhost
192.168.50.5 fusion.deadmeat.com fusion

Anytime my IP changes my "dyndns client" updates my dyndns service
provider. The dyndns provider updates the needed internet dns servers
with changes to my registered dyndns name.. this can take some time to
get around to the rest of the world but generally very quick for me.
The dyndns client holds a cache/config file of some sort. Just before
you reboot your dyndns client should set the ip info that you
currently have to a cache file. When you power back up.... (and
assuming that you have added ddclient to your default run level
through "rc-update") the dyndns client will have your old info saved
and compare it to what it currently see's on your NIC interface. If
this differs then it will contact the dyndns provider and update your
dyndns records and at the same time update the local dyndns cache file
with the new ip..
During normal operations through out the day (depending on how you
have set the ddclient config file) the dyndns client should poll your
NIC interface every number of [minutes that you specified in your ddclient config file]....

most current >ip can't something do similar for those of us stuck
rotating ips by outputting to >our /etc/hosts?

It should be doing this anytime your IP changes. Maybe you need to
adjust your ddclient config file. http://linux.cudeso.be/linuxdoc/ddclient.php


I don't understand what is broken and what your trying to accomplish
with this. I've never personally tried to make "localhost" resolve to
2 different ips at the same time.

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