Many of my application users started facing DNS_PROBE_FINISHED_NXDOMAIN issue intermittently. I learned that this could be possibly due to a DNS issue on users' computers or home networks, but it cannot be the case with most users.
My application is hosted on AWS and users in Norway are complaining about the application unavailability issue. When I tried connecting to multiple users, it was throwing DNS_PROBE_FINISHED_NXDOMAIN error
Surprisingly when I pinged IP from user system, it was returning response however pining domain was not working.
I also tried nslookup using domain but no response returned.
In my understanding this is not local computer issue as application works fine most of time but breaks intermittently with referred issue.
Any insight into troubleshooting the issue will be greatly appreciated.
Related
I'm facing a very strange issue with nuxt 2.15.8 during production and specifically users who opens the site from UK. The main issue is that images are not hydrating, so after investigation the only thing I could notice in the console is this error
GET https://my-site-name.com/_nuxt/a5d3b1c.modern.js net::ERR_ABORTED 404
There are like 4 or 5 similar errors to this one. I can't ever replicate the issue locally and It never happens unless the user is opening the site from UK. I can replicate it in production by turning on a VPN in UK and open the site in incognito mode.
Any ideas that might fix the issue? The site is deployed on GoogleCloud and cloudflare.
I have followed this guide in setting up my localtunnel:
https://www.hongkiat.com/blog/accessible-local-web-server/
however, when I run the following command lt –port 80 nothing is showing. I started looking for this solution since Facebook seems to have stopped localhost access to FB.iu() method for sharing content on their site.
I have tried running as admin while disabling firewall and McAfees Antivirus Scan. I have used ngrok before now too but Facebook rejects it for no clear reason.
Below is an image of the steps taken:
Managed to get my way around this localhost tunneling issue using ngrok.
I noticed I'm expected to add additional domain names under App Domains in Facebook APP settings. So I added ngrok.io as an additional APP Domain and WHALAH! everything started working for the FB.ui() method.
I recently finished my django project and deployed it successfully without any errors in heroku. It works fine with the appname.herokuapp.com domain. But when i tried to add my custom domain, i got a very different problem.
Only my machine can access the page. Weird right! Yes. The page can be accessed only by me in my machine. But i get DNS_PROBE_FINISHED_NXDOMAIN error. Really weird! I guess this is not the problem with the code and i know i'm missing somewhere in the dns configuration. I bought my domain in big rock. So please guide me through this weird problem.
The development site is arr-coaching.herokuapp.com
The deployed site is www.arccphysics.in (Which you cannot access) :(
And any device connected to my WIFI can open the site. Some serious thing! Please help me out !
I have a Rails 4.2.1 application with multiple engines under it. The application has been hosted in production with Apache2 and Passenger and was working fine till a few weeks back. I am now facing a strange problem and unable to load assets under one particular engine and get the error "Failed to load resource: net::ERR_CONNECTION_RESET" when trying to load javascript or other asset files under a particular engine.
The application structure is
Root
AssessmentTools (app->assets->javascript->assessment_tools->angular.js)
QuestionBankTools (app->assets->javascript->question_bank_tools->angular.js)
All seems to work fine when loading resources under AssessmentTools (http:///assets/assessment_tools/angular.js), but fails for QuestionBankTools (http:///assets/question_bank_tools/angular.js).
Also, everything seems to work fine on localhost and even in a VM that i hosted on my development machine (with app running behind Apache2 and Passenger), but the problem appears when i host it on server behind a proper a domain.
I have tried cleaning up the server and re-installing the application but without success. I am not able to figure out what could have changed in the past weeks to create this issue.
In my case the problem turned out to be an over eager firewall filter introduced by the data server admin. They had blocked off all url having particular keywords in it.
Fixed the firewall and all is well.
I have set up a server for our Django web application so that everyone in our LAN can access them. I have installed Ubuntu 12.04 with apache version 2.2.22 and modpython version 3.3.1. In some of our systems in the LAN, the server is not accessible through url as well as ssh while in some others it is accessible sometimes. As we are connecting remotely to the system, this is causing a lot of problems.Kindly help me in solving this issue.
Thanks in advance.
This type of question is super hard to answer because the possibilities are almost endless. However, from what you're saying, if some machines CAN access the server and SOME can't, the problem is related to networking, and not the server software (or Django).
Though it could be related to either if you have some weird access rules setup that you're not mentioning in your response.
So, a few things to verify:
Can the machines which cannot access the application via HTTP ping the server they reside on by its IP address? If they can't, you have a networking issue. Could be a routing problem, could be a firewall issue.
To see if it's a routing problem, do a traceroute from one of the machines that cannot access your server, and see what happens. Did the traceroute stop at a particular router on your network? Well, then that's probably an issue.
To see if it's a firewall issue, try changing the IP address of one of the machines that can't access the server to one of the machines who can. Did it work? OK, you have a firewall problem.