I am still experimenting with gopher, however this got me thinking about system security, so I have installed.

If you are not sure what you are doing with this, please consult the man page

man ufw

So this describes ufw as

ufw - program for managing a netfilter firewall

As I am ssh'd in to the pi, then the firewall needs to be enabled, however, first make sure that that port 22 (or which ever port you are using for ssh) is allowed. I have to do this as being logged in via ssh, emabling the firewall could block ssh preventing access.

sudo ufw allow 22

Then check the status

sudo ufw status
Status: active

To                         Action      From
--                         ------      ----
22                         ALLOW       Anywhere                  
22 (v6)                  ALLOW       Anywhere (v6)             

To confirm that port 22 is allowed, then enable

sudo ufw enable

Links

• using UFW
• Port Numbers
• Wikipedia TCP
• Wikipedia UDP

Tags

#Bash,#Bashscripting,#BashScripting#Security,#Firewall

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As this series is going to eventually get to looking at cybersecurity, it would be a good idea to learn about networking concepts. This video seems good at explaining some of this. In fact, it also covers firewalls, which I had planned for a later post.

• Networking basics (2020)

I have also added links to details of common network ports and their associated services.

What is:

• a switch
• router
• gateway
• subnet
• gateway
• firewall
• DMZ

Links

• virtual machine login link
• Common Network Ports

Tags

#CyberSecurity,#Networking,#Ports,#Switch,#Subnet,#IP,'#Gateway,#Firewall,#DMZ,#Router,#Ports

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I spent some time on last night, setting up a mini web server on m Raspberry pi.

So running a http server on a Raspberry Pi.

For this project I am just using the python3-test-server package,

1. Install python3-test-server
2. Create a directory to hold some html files
3. Change to this directory
4. Create a very basic html file e.g index.html
5. run python3 -m http.server:7800 where 7800 is the port you want to use

In the browser go to ip:7800

What I have done here, however is

• Run the server on the pi,
• Connected via ssh to create the site files and run the server
• Edited the basic website on the pi via ssh, by running a text editor

• To copy other files directly from my main PC to the Pi i used

  • scp file.jpg pi@ip:path e.g
    • scp file.jpg pi@ip:/home/pi/html/

I have, gone a little further than this:

In order to share my free software video dvd (and other resources) with people I:-

• Uploaded files to the server
• Created a web link to the iso file
• Edited my router firewall so it would allow a connection to the pi

I then shared the appropriate IP address with a friend via irc so he could download the ISO file, and it worked really well.

REFERENCES

• Free Software Foundation

TAGS

#YearOfTheFediverse,#httpServer,#website,#html,#css, #Python,#Firewall,#Networking,ProblemSolving,#Skills,#IT

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License

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