Forgive me here, I am largely post-technical for 10+ years and taken this as far as I can. I can probably take any advice and run with it, but may ask for some specifics to help if troubleshooting tools or commands are required. So please forgive that too.
Background:
Yesterday we could hit site URL after restarting VM hosted on Google Cloud. Sometime overnight, the URL was inaccessible.
Message:
This site can’t be reached <URL> refused to connect.
Try:
Checking the connection
Checking the proxy and the firewall
ERR_CONNECTION_REFUSED
Troubleshooting:
can load using IP.
The technical guys (3rd party suppliers) insist they have not made any changes. My team have not made any changes.
The domain is still valid (it renews tomorrow)
The domain is used for the DEV environment with DEV as a prefix hosted on another VM.
Looking at firewall rules, all the rules with the proper tags appear to be set up correctly for HTTPS with appropriate IP (0.0.0.0) and port 80.
Many thanks in advance for your help. When I find the answer, I will post it here.
RESOLVED:
ROOT CAUSE:
During setup on GCP, the team forgot to link the reserved external IP address to the VM. As such, the external IP address was ephemeral so after a reboot of the server, Google issued a new external IP for the VM.
SOLUTION:
Reserve a static external IP Address and link it to the VM or promote an existing ephemeral external IP Address.
https://cloud.google.com/compute/docs/ip-addresses/reserve-static-external-ip-address
Related
I changed my VM instance from "F1-micro" to "E2-micro". When I then restarted my machine, I couldn't access my webpage using the domain name, the webpage just shows an "Error 521" code - showing that my browser is working, CDN is working but the host has an erorr. When I paste the VMs IP address into my webpage, however, it show's the "Apache2 Debian Default Page".
Can somebody please help me with this?
The Error 521 message is caused by one of two situations:
First, check whether your WordPress site’s server is down. Even if everything else is configured properly, if your WordPress site’s server is offline, Cloudflare simply won’t be able to connect.
Second, your web server might be running fine but blocking Cloudflare’s requests. Because of how Cloudflare works, some server-side security solutions might inadvertently block Cloudflare’s IP addresses.
Cloudflare is a reverse proxy, all the traffic coming to your origin server will appear as if it’s coming from a small range of Cloudflare IPs (rather than each individual visitor’s unique IP address). Because of that, some security solutions will view high traffic from a limited number of IP addresses as an attack and block them.
Please check this link out in order to fix error 521 for Cloudflare and WordPress.
Turns out this problem was caused by my having installed the Debian Apache server package and it is causing collisions between it and the Apache shipped in the stack. Bitnami Stacks are completely self-contained and run independently of the rest of the software or libraries installed on your system.
So to fix this, all I had to do was run the following commands:
sudo systemctl stop apache2
sudo /opt/bitnami/ctlscript.sh restart
I'm trying to connect WordPress instance on google cloud with the custom domain but I'm having this error
This site can’t be reachedquotivy.com refused to connect.
Try:
Checking the connection
Checking the proxy and the firewall
ERR_CONNECTION_REFUSED
What I found it wired is that the domain is working on Tor browser and not working on Chrome and Safari, and I tried to take an online screenshot from it and it's working & I ping the domain and seems working too! not so sure what to debug or do to fix this bug!
This is a sample URL: https://quotivy.com/rumi/when-the-world-pushes-you-to-your-knees/
How it looks like on my browsers:
Custome DNS on my google cloud
If you have moved the site recently then check in your database (either domain.com/phpmyadmin or SSH if Cloud SQL) for references to the old domain and update to the new domain. This includes moving from http to https
In GCP Compute Engine VM Instance settings, make sure to allow http and allow https traffic. You may want to assign a static IP in GCP Console > VPC Network > External IP addresses
Lastly you may need to update etc/apache2/sites-enabled/000-default.conf to make sure your servername matches your WordPress domain name
As mentioned in the question, I have deployed my service on IIS and using my computer ip address "111.111.111.1:100 and also specify the port (100).
I also checked if the port was listening which it is. The service deploys with no problem. I can also see the asmx file however when I open it is just blank. I have done some research before posting this question but didn't find and valid answer to my question. Hopefully will find it here. Thanks in advance.
Research made
WCF rest web service working on localhost but not on host
https://social.msdn.microsoft.com/Forums/en-US/823b076c-160d-4f52-86ad-c84dfb91accb/webservice-running-on-localhost-but-not-running-with-full-server-name?forum=biztalkgeneral
Did you check your firewall settings? Maybe the firewall is blocking the port you are using
On Friday I hosted a WordPress site on my micro instance - I installed LAMP stack, and WordPress on it.
Instance state is Running, but when I try to access website with public domain given in console, it says
web page Not available
I have set an Outbound rule to allow everyone and Inbound rule for my IP address only.
This is about accessing website from outside world, but when I try to connect to my instance with JAVA Interface, MindTerm Web SSH, it says
Network connection timeout error
Can't figure out anything, Just started working on AWS.
I think you have confused the Outbound and Inbound rules - Outbound means traffic going out from the server, while Inbound means traffic from the internet to the server.
As you say, you added an Inbound rule for your IP address only, and you can access the website from you IP only, just like you requested.
Add an Inbound rule for port 80 for0.0.0.0/0, and you should be able to access the site from other locations as well.
If you need to open it to HTTP and SSH, open it for both for 0.0.0.0/0:
Please verify your settings and permission based on this :
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/TroubleshootingInstancesConnecting.html
You might also want to check your firewall, in case that is blocking the access..
I installed on my server, a Bug tracker which is accessible through port 3000 (http://myserver:3000).
Every thing is ok on my server, i can access to my web application any time, but in my job's computer, i cannot even connect to this application and no other web application which run on different port other than 80.
I have added a role on the windows Firewall settings by letting connection to and from port 3000. But same result.
If some one have a solution to this, i'll be thankful.
Best Regards
Is it possible that your work network is blocking your home machine. Can you ping your home machine or access it with its ip address? When you type
http://myserver:3000
are you doing this from the local intranet? If you have your bug server on your home machine then you won't be able to access
http://myserver:3000
from your work machine without a fully qualified domain nae or ip address?
If the above answers are all resolved then whenever I have such difficulties on windows, I do the following. If you don't have admin rights you might not be able to do this.
temporarily disable all firewall/antivirus programs.
Start web server listening on port 80 (on your home machine)
Access from a different machine if this works then
Start web server on 3000
Access from a different machine.
If it works then it is a matter of finding whether the problem was that the web request was being blocked by the firewall or antivirus. In your case it appears it might be the antivirus. To confirm disable all antivirus for a moment.
Make sure you turn your antivirus/firewall back on once the problem is diagnosed!