I searched through the web but nothing was working. So I decided to go through the server log. I know I should have done this first.

I found these lines in the syslog file:

The issue was in iptables and I needed to flush it

I ran the command highlighted in the the image above

/usr/sbin/netfilter-persistent flush 

It gave following output

I tried to to connect to the port 80 and the default nginx page loaded in browser.

Problem solved.

But doing this messed up my OpenVPN server. OpenVPN client was connecting but internet was not accessible.

So I rebooted the system to see if it fixes the problem.

It did fixed OpenVPN.

But again port 80 was inaccessible.

I checked the status of ufw and it was disable. I had enabled it before I rebooted. Iptable rules were all reset. I googled why ufw was disabled and found iptables-persistent conflicts with ufw.

I disabled iptables-persistent using this command

sudo systemctl disable netfilter-persistent

I rebooted the system again and this time ufw stayed enabled and I was able to access the port 80 and also OpenVPN was working as intended.

The post [Solved] Ubuntu refusing connection on port 80 appeared first on Installing.in.

Openresty has many built-in Nginx modules that make it a powerful web app server. A most popular feature of Openresty is built-in Lua programming language support. You can directly use Lua scripts inside the Nginx conf files. You can write a high performance web application in Lua without having to install any other package other then Openresty.

For this guide, I will be using a fresh 1GB server from Vultr hosted in Germany.

There are 2 ways to install Openresty. Either you can use the prebuilt binaries or you can download the source and compile it yourself.

For this guide, I will be using the first method as it is easier and also it makes it easier to update Openresty later.

Step 1: Import the GPG key:

We need to import a GPG key as the package we will be downloading is encrypted and this key helps in verifying the package’s authenticity. Run following command to download and add the GPG key from the Openresty official server.

wget -qO - https://openresty.org/package/pubkey.gpg | sudo apt-key add -

Step 2: Add Openresty repository:

Let us first add the apt-add-repository command

sudo apt-get -y install software-properties-common

Now run below command to add the repository. This command will detect the version of ubuntu you are using and add the appropriate repository.

sudo add-apt-repository -y "deb http://openresty.org/package/ubuntu $(lsb_release -sc) main"

Now you will have the official Openresty apt repository added to your system.

Step 3: Install Openresty:

First let’s update the apt index. Use this command to do so

sudo apt-get update

Now run this command to download and install the Openresty from its official repository

sudo apt-get install openresty

If everything goes well you will have Openresty successfully installed of your server.

Check it by visiting the IP address of your server. You will see a page like this:

Bonus tip:

If you are trying to replace previously installed Nginx with Openresty rather the installing it on fresh server then disable and stop the Nginx before following this tutorial.

Disable Nginx with this command

sudo systemctl disable nginx

and stop Nginx with this command

sudo systemctl stop nginx

If you face any problem while installing openresty please let me know in the comments section so we can solve it together.

The post How to install Openresty on Ubuntu 18.04 appeared first on Installing.in.

In this series:

• How to Install NodeBB on Ubuntu 14.04  (Previous)
• How to install Letsencrypt with NobeBB and Nginx (This tutorial)
• How to Set up Letsencrypt Auto Renewal (Later)

Steps you need to follow:

1. Install nodeBB forum
2. Install nginx server
3. Install letsencrypt client
4. Obtain letsencrypt SSL certificate
5. Configure nginx to to use the SSL certificate

For first and second steps see this tutorial –>How to Install NodeBB on Ubuntu 14.04.

Install Letsencrypt client:

Currently best way to install letsencrypt on ubuntu is to clone letsencrypt repository from github. So we will first install git and bc on our system.

sudo apt-get update

sudo apt-get -y install git bc

Now clone letsencrypt repository

sudo git clone https://github.com/letsencrypt/letsencrypt /opt/letsencrypt

You can find copy of letsencrypt repository in the /opt/letsencrypt folder.

You have successfully installed letsencrypt client on your system.

Obtain letsencrypt SSL certificate:

We will be using Webroot plugin to obtain SSL certificate.

Webroot plugin works by placing a special file in the /.well-known directory within your document root, which letsencrypt will open for validation. You need to allow access to this /.well-known directory.

sudo nano /etc/nginx/sites-available/default

inside the nodebb server block we created in last tutorial add this location block:

 location ~ /.well-known {
          allow all;
 }

press ctrl+O then enter to save

press ctrl+x to exit

Reload nginx to load the new configuration.

sudo service nginx reload

Now that we have done the initial setup it’s time to obtain the actual certificate.

Go to letsencrypt  client directory by entering this command:

cd /opt/letsencrypt

Run this command to obtain certificate for your domain  (replace red text with your domain):

./letsencrypt-auto certonly -a webroot --webroot-path=/usr/share/nginx/html -d example.com -d www.example.com

You will be prompted for some information. Exact prompts depends on whether you have used letsencrypt earlier on your system or not.

It will ask for your email address which will be used for notices and lost key recovery.

You will need to agree to Letsencrypt terms of service.

if everything goes successfully you will see something like this:

Note the path of your certificate. this is needed in next step.

Configure nginx to to use the SSL certificate:

Now we need to edit the nginx configuration so nginx uses the freshly generated SSL certificate to serve our nodeBB forum over https connection.

sudo nano /etc/nginx/sites-available/default

Delete the server block we created in last tutorial and replace it with the code block below.

Replace with your domain where marked red.

server {
listen 80;
 server_name example.com www.example.com;
 return 301 https://$host$request_uri;
}
server {
 listen 443 ssl;
 server_name example.com www.example.com;
 ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
 ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
 location / {
 proxy_set_header X-Real-IP $remote_addr;
 proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 proxy_set_header Host $http_host;
 proxy_set_header X-NginX-Proxy true;
 proxy_pass http://127.0.0.1:4567/;
 proxy_redirect off;
 # Socket.IO Support
 proxy_http_version 1.1;
 proxy_set_header Upgrade $http_upgrade;
 proxy_set_header Connection "upgrade";
 }
 location ~ /.well-known {
 allow all;
 }
}

It should look like this:

Now reload nginx to put changes into effect.

sudo service nginx reload

Check your forum by visiting it using https

https://www.example.com

Thats it. Hope it help

Next in series:

• How to Set up Letsencrypt Auto Renewal

The post How to install Letsencrypt with NobeBB and Nginx appeared first on Installing.in.