Why Do INPUT Rules Block My Server’s Outbound Connections?
I'm trying to tighten a server's firewall rules without accidentally locking myself out of remote administration. Instead of using a default DROP policy, I inserted these rules near…
Linux firewall
Why Do These iptables INPUT Rules Break Outbound Connections?
I'm trying to harden a server with iptables without accidentally locking myself out of remote access. Instead of using a default DROP policy, I inserted these rules near…
What’s a sensible default firewall policy for a DHCP-based home LAN?
I'm configuring a host firewall for several devices and virtual machines on my local network. Their IPv4 addresses come from DHCP, so the addresses can change, and different…
Should a host firewall deny everything except local network traffic?
I'm setting up a firewall for devices that use DHCP, so their addresses can change over time. I want different devices on my local network to reach different…
How Concerned Should I Be About Malware When Using Linux?
I've been learning about Linux while waiting for a new computer, and malware is one of my biggest concerns. Does Linux have antivirus software comparable to Windows? Do…
How worried should I be about malware when switching to Linux?
I've been learning about Linux while waiting for a new computer and malware protection is one of my biggest concerns. Does Linux have antivirus tools comparable to those…
Is nftables really better than iptables, or just harder to learn?
After upgrading a Rocky Linux 10 server, I found that the newest kernel no longer loads the legacy iptables modules I was using. I started looking at nftables,…