firewall beginner

[johnyb98]

Hi dear members.

 

Please, I would like your help to the following.

Last days I have began my entry to firewalls study. For now, I cannot yet buy a book. So, I need real good studying notice. I have tried a lot by google-ing, but yet, have not found some kind of this good notice.

What would satisfy and help me on that is some web pages or documents to download that would explain real good about firewalls, kind of firewalls, hardware and software firewalls, real good diagrams, exercises on filtering (rules) with their solution to practice, etc.

So, please, I would like your help for some links on these web pages, or documents to download for reading. Also, if somebody has his/her own documents that can share, please send me a p.m. to send him/her an e-mail to send me what he/she can.

 

Thank you for your time!

[jj9987]

Not quite what you asked, but still very useful part on firewalls from pfSense book - https://docs.netgate.com/pfsense/en/latest/book/firewall/index.html