Based on our record, ufw should be more popular than SSHGuard. It has been mentiond 4 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
You may already know this, but gufw is simply a graphical front-end to the Uncomplicated Firewall (ufw) service. Fedora uses the Firewalld back-end service instead of ufw. I believe you would need to replace Firewalld with ufw entirely in order to make gufw a plausible solution. Source: about 1 year ago
I just started using ufw https://launchpad.net/ufw and I found that it only shows --help for the root command. Source: over 2 years ago
Why do you think Gufw is proprietary? It's FOSS, licensed as GPL v3, as documented here. Source: almost 3 years ago
Another option is to use UFW and rate limit incoming packets. Because it's a firewall, it will block the queries even before they hit Pi-hole, but it might be a tad more tricky to set up. I also don't know if you can set it as a limitation per client or only in general (per port/rule). I'll leave that for you to investigate further. Source: about 3 years ago
There are now better defensive tools (I use https://sshguard.net/); not that there are any accounts on this system that are vulnerable, but it does keep the relevant logfile from growing to astronomical size. Source: about 3 years ago
TinyWall - Lightweight and non-intrusive firewall
Fail2ban - Intrusion prevention framework
Windows 10 Firewall Control - Windows 10 Firewall Control: simple and exhaustive solution for applications network activity controlling and monitoring.
RdpGuard - RdpGuard allows you to protect your Remote Desktop (RDP), POP3, FTP, SMTP, IMAP, MSSQL, MySQL, VoIP/SIP from brute-force attacks by blocking attacker's IP address. Fail2Ban for Windows.
Emsisoft Online Armor Firewall - Emsisoft Online Armor Firewall is a freemium online firewall protection system by the Emsisoft that is based on the own independent protection technology of the Emsisoft.
IPBan - Block hacking attempts on RDP, SSH, SMTP and much more