SetUp DynDNS on OpenBSD router.

Hi EE -

I have an OpenBSD router and  I am going to setup DynDNS. I have their "Custon DNS" plan. Once I have it running, I am going to purchase their "Mail Outbound" service. That way when I run scripts that send alerts using mailx, the relay will run through DynDNS. This last item is not my question right now. Just some background.



I found these instructions:

http://openbsd-wiki.org/index.php?title=DynDNS

One question I have is with this line:

######################################################################################################################

#cd /etc
#/usr/local/bin/ipcheck.py --makedat -i <if> <username> <password> <domains>

Where <if> is you network interface with the IP address you want to
register(ex: pppoe0), <username>/<password> are your DynDNS account
information and <domains> are a coma seperated list of domain to
update(ex:domain1.dyndns.org,domain2.dyndns.org).

#########################################
##############################################################################

I know <username> and <password> ... I think <domains> is <MYDomainThroughDynDNS.com>

But I am not sure about <if> ?

All I can think is:

ifconfig tun0
tun0: flags=8011<UP,POINTOPOINT,MULTICAST> mtu 1492
       inet 69.223.xxx.xxx --> 69.223.xyz.xyz netmask 0xffffffff

The other question I have is:
when editing the crontab,

as su (root),  I would :> crontab -u su -e

Then I would add say:

*/10     *       *       *       *      /usr/local/sbin/do_ipcheck

For every 10 minutes.

Does this sound right?

As usual, any help will be appreciated.

Thanks -
wotan1953Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

gheistCommented:
if = network interface that holds IP address to be published.
do nslookup against your domain.
checking more often than domain ttl is of little value.
0
wotan1953Author Commented:
Hey gheist -

So I do nslookup on my domain name registered at DynDNS. And use that IP in the <if> argument above?

Did the crontab look good?

Thanks -

0
gheistCommented:
I think crontab entry should be adjusted to match domain TTL (first of numbers in header in seconds) like /30, but it should work perfectly your way.
You do not have to use IP, you have to use interface name like fxp0
0
Cloud Class® Course: Microsoft Office 2010

This course will introduce you to the interfaces and features of Microsoft Office 2010 Word, Excel, PowerPoint, Outlook, and Access. You will learn about the features that are shared between all products in the Office suite, as well as the new features that are product specific.

wotan1953Author Commented:
Thanks that's is what I though regarding the network interface. But, I am just lost. If I do nslookup on say wotan.com,

Name:      wotan.com
Address: 68.178.232.99


I don't see an interface like fxp0 or pppoe?  I know when I run ifconfig -a on my OpenBSD router , I see :

tun0: flags=8011<UP,POINTOPOINT,MULTICAST> mtu 1492
        inet 69.223.38.167 --> 69.223.47.254 netmask 0xffffffff

This IP is my current assigned one. Is tun0 my <if>?

I also, have my 2 network cards in there:

rl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        address: 00:e0:7d:92:17:ab
        media: Ethernet autoselect (none)
        status: active
        inet 192.168.0.254 netmask 0xffffff00 broadcast 192.168.0.255
        inet6 fe80::2e0:7dff:fe92:17ab%rl0 prefixlen 64 scopeid 0x1
ep0: flags=8863<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        address: 00:20:af:f7:9c:5a
        media: Ethernet 10baseT
        status: active
        inet6 fe80::220:afff:fef7:9c5a%ep0 prefixlen 64 scopeid 0x2



But tun0 has the ip that would need to be sent to DynDNS.

Thanks -


0
gheistCommented:
Yes - tun0 is your network interface which holds your public IP address.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
wotan1953Author Commented:
Okay ... I'm having problems with python. Thanks GHeist ... as usual .. this was very helpful.  I think I'm going to look for a perl approach.

Thanks Again
0
wotan1953Author Commented:
I don't have python installed on 3.2 ... and from what I am reading ... I am not going to try. Thanks for all your help.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Unix OS

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.