How to monitor a dynamic WAN IP address

sintei · December 30, 2016, 10:13am

Hello,

Background:
I have openhab on 1 computer in one VLAN , ex 192.168.1.x with a normal WAN IP.
However, I would like to check if the WAN IP changes on another VLAN ex 192.168.2.x.
Reason, this WAN IP is always on an VPN.
I can access the second VLAN from my openhab.

Would it be possible somehow to make openhab ask VLAN ‘2’ for its WAN IP adress just for this instance?
I would like top check if it goes down and reveals my “real WAN IP”.

DocFraggle · December 30, 2016, 2:42pm

You can do this by setting a host route in your openHAB system. I.e. if you’re using the solution from above, you just have to add this route (Linux in this case):

ip route add 45.76.25.15/32 via 192.168.2.254

where 45.76.25.15 is the IP of icanhazip.com and 192.168.2.254 is your router in VLAN 2.

Christian

sintei · December 31, 2016, 9:08am

Obviously I’m a dumbnut, but could not get it to work via adding the routes normally.
Fortunately, there was a another routing setting in my router so I could set the destination IP to go via VPN instead which worked as expected.
Thank you for the help!

Seaside · December 31, 2016, 11:13am

I’ve been using ddclient for the past 10 years I think. Also going with no-ip as provider. Ddclient has very good support for most dns services.

https://sourceforge.net/p/ddclient/wiki/Home/

NCO · April 28, 2017, 12:21pm

Thanks for the tipp.
I am using icanhazip.com successfully, but have one issue:
Sometimes it does not work and the entire html response wll flood my log file.

So I would like to check whether the returned String is shorter than 17 digits.
Any suggestion how I could do this within OH (without an external script)?
Thanks in advance.

ip-ua · May 1, 2017, 6:05am

I have OH 1.8.3 and using canhazip.com for more then year, but for last few days log file is fool of warnings like this:

2017-04-30 20:02:08.272 [WARN ] [.a.c.httpclient.HttpMethodBase] - Cookie rejected: "$Version=0; __cfduid=d8174938ef26dc52c7c3ad5abff6998311493571727; $Path=/; $Domain=.icanhazip.com". Illegal domain attribute ".icanhazip.com". Domain of origin: "icanhazip.com"

How this can be fixed?

NCO · May 1, 2017, 6:33am

That’s exactly the problem I encountered, but I hoped it was just a temporary issue.
Obviously it’s not…
Fritzbox wanip (with Fritzbox TR064 binding) is not working either…

Robert_Jensen · May 1, 2017, 7:51am

I changed service to this : https://api.ipify.org

It seams to fix the cookie errors

rtvb · May 1, 2017, 3:17pm

The original example used the default REGEX transformation to just return the output of the web request. I have modified the example to use a JavaScript transformation that tests for a valid IP address. Please see above.

Cookie messages are gone, but as far as I have noticed the icanhazip service kept working as expected.

NCO · May 3, 2017, 7:37pm

Thanks.
That did the Trick.

MariMa · September 9, 2017, 12:27pm

There must ba a } at the end and then it works

rtvb · September 9, 2017, 12:58pm

You are right. Corrected.

MariMa · September 9, 2017, 2:07pm

One question:
When starting in openhab.log I get the error message:

2017-09-09 15:59:59.444 [WARN ] [el.core.internal.ModelRepositoryImpl] - Configuration model ‘wanip.rules’ has errors, therefore ignoring it: [3,5]: no viable alternative at input ‘changes’

2017-09-09 16:00:05.296 [ERROR] [ab.binding.http.internal.HttpBinding] - Transformation ‘JS(valid_ip.js)’ threw an exception. [response=xx.xx.xx.xx
]
org.openhab.core.transform.TransformationException: An error occurred while loading script.
at org.openhab.core.transform.TransformationHelper$TransformationServiceDelegate.transform(TransformationHelper.java:62)[189:org.openhab.core.compat1x:2.1.0]
at org.openhab.binding.http.internal.HttpBinding.execute(HttpBinding.java:189)[188:org.openhab.binding.http:1.10.0]
at org.openhab.core.binding.AbstractActiveBinding$BindingActiveService.execute(AbstractActiveBinding.java:157)[189:org.openhab.core.compat1x:2.1.0]
at org.openhab.core.service.AbstractActiveService$RefreshThread.run(AbstractActiveService.java:169)[189:org.openhab.core.compat1x:2.1.0]

Do you know something about it?

My *.rules file:

rule "Monitor WAN IP"
when
Item Network_WAN_IP changes
then
// perform any action needed
val currentState = Network_WAN_IP.state
if (currentState == “-”) {
logError(“MonitorWANIP”, “Unable to get WAN IP”)
} else {
logInfo(“MonitorWANIP”, "WAN IP changed to: " + currentState)
}
end

rtvb · September 9, 2017, 4:49pm

Just to start with. I assume you are using OH2 and have installed the JavaScript transformation service?

http://docs.openhab.org/addons/transformations/javascript/readme.html

MariMa · September 10, 2017, 3:48pm

Hello Robert, thanks for your fast reply. Yes, I am using OH2. As written in the link I created the getValue.js file in /etc/openhab2/transform folder:

-rw-rw-r-- 1 openhab openhabian 98 Sep 10 17:27 getValue.js

but still get the message:

2017-09-10 17:42:19.171 [ERROR] [ab.binding.http.internal.HttpBinding] - Transformation ‘JS(valid_ip.js)’ threw an exception. [response=91.240.65.131
]
org.openhab.core.transform.TransformationException: An error occurred while loading script.
at org.openhab.core.transform.TransformationHelper$TransformationServiceDelegate.transform(TransformationHelper.java:62)[189:org.openhab.core.compat1x:2.1.0]
at org.openhab.binding.http.internal.HttpBinding.execute(HttpBinding.java:189)[188:org.openhab.binding.http:1.10.0]
at org.openhab.core.binding.AbstractActiveBinding$BindingActiveService.execute(AbstractActiveBinding.java:157)[189:org.openhab.core.compat1x:2.1.0]
at org.openhab.core.service.AbstractActiveService$RefreshThread.run(AbstractActiveService.java:169)[189:org.openhab.core.compat1x:2.1.0]

every ten minutes.

My valid_ip.js

// return valid IP or '-'

(function(ip) {

  // remove blanks first

  ip = ip.replace(/\s/g, '');

  // http://stackoverflow.com/a/26445549

  var rx=/^(?!.*\.$)((1?\d?\d|25[0-5]|2[0-4]\d)(\.|$)){4}$/;

  if (rx.test(ip)) {

    return (ip);

  else {

    return "-";

}](input)

// input variable contains data passed by openhab

rtvb · September 10, 2017, 6:26pm

Perhaps that square bracket is the error. It is not in my script.

MariMa · September 10, 2017, 6:58pm

Oh, don’t how this typo happens. Copy paste your original and restarted the Raspberry Pi. But same behavior

2017-09-10 20:55:20.521 [ERROR] [ab.binding.http.internal.HttpBinding] - Transformation ‘JS(valid_ip.js)’ threw an exception. [response=91.240.65.131
]
org.openhab.core.transform.TransformationException: An error occurred while loading script.
at org.openhab.core.transform.TransformationHelper$TransformationServiceDelegate.transform(TransformationHelper.java:62)[189:org.openhab.core.compat1x:2.1.0]
at org.openhab.binding.http.internal.HttpBinding.execute(HttpBinding.java:189)[188:org.openhab.binding.http:1.10.0]
at org.openhab.core.binding.AbstractActiveBinding$BindingActiveService.execute(AbstractActiveBinding.java:157)[189:org.openhab.core.compat1x:2.1.0]
at org.openhab.core.service.AbstractActiveService$RefreshThread.run(AbstractActiveService.java:169)[189:org.openhab.core.compat1x:2.1.0]

Update: Moved the *.js from scripts to transform folder and it is working

banzaay · January 30, 2018, 4:17pm

Hi Robert,

I have implemented your script on OH2.2 and it works, but I got this warning in my openhab.lg file:
2018-01-30 15:20:11.016 [WARN ] [.core.transform.TransformationHelper] - Cannot get service reference for transformation service of type JS
2018-01-30 15:20:11.020 [WARN ] [ab.binding.http.internal.HttpBinding] - Couldn’t transform response because transformationService of type ‘JS’ is unavailable

What is the problem ?

Bye Mirko

rtvb · January 30, 2018, 8:28pm

I think you need to install the JavaScript transformation service first. The easiest wat is to do this through Paper UI.

banzaay · February 1, 2018, 9:43am

That was the problem.

Thanks