[Web4lib] IP address changes

Will Kurt wkurt at bbn.com
Fri Dec 7 13:59:41 EST 2007


An import issue that I'm not entirely clear on from your email is 
what you need a static ip for.  If you have databases that 
authenticate by IP, then even if you are able to find your current ip 
address it's going to be a pain to have to constantly update the 
database vendors that this has happened, it would be much better to 
see if they could authenticate the entire range that your dynamic IPs 
fall under (I believe that this actually shouldn't be too large, but 
Comcast would know better).

If you need a static IP for things like running a test webserver 
(which violate certain isp's TOS), or connecting remotely via ssh etc 
than I recommend a free service like 
<http://www.dyndns.com/>http://www.dyndns.com/  which will do DNS for 
dynamic IPs. You get a pretty generic domain name which will always 
redirect you to the correct ip address.  Also it would be very 
trivial to quickly write a shell/batch script that routinely ping'd this host.
In windows just create a schedule task that runs essentially this
'ping myhost.dynamicDNS.org > ipfile.txt'
and ipfile.txt will always have your current ip.

--Will



At 12:28 PM 12/7/2007, L Cohn wrote:

>I was told by the man who fixes our computers that we have a free 
>Comcast line and so the IP address of our library computers will 
>change every so often.  His answer to my next question was no, but 
>I"m hoping someone out there might have an idea for me.
>
>Instead of trying to log in to our online databases from inside the 
>library and finding out after the fact that our IP addresses have 
>changed, I was wondering if there was any way for me to be notified 
>automatically when our IP addresses have changed or are about to 
>change.  Any ideas?
>
>Thanks,
>Lisa
>
>------------------------------------
>Lisa Cohn, ILL, WebMaster,  Reference
>Bloomfield Public Library,  bplnj.org
>90 Broad Street, Bloomfield, NJ 07003
>   (973-566-6200x217, lcohn at bplnj.org
>------------------------------------
>
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