I got hacked: My Hetzner server started mining Monero

>>jakels+(OP)
> I also enabled UFW (which I should have done ages ago)

I disrecommend UFW.

firewalld is a much better pick in current year and will not grow unmaintainable the way UFW rules can.

    firewall-cmd --persistent --set-default-zone=block
    firewall-cmd --persistent --zone=block --add-service=ssh
    firewall-cmd --persistent --zone=block --add-service=https
    firewall-cmd --persistent --zone=block --add-port=80/tcp
    firewall-cmd --reload

Configuration is backed by xml files in /etc/firewalld and /usr/lib/firewalld instead of the brittle pile of sticks that is the ufw rules files. Use the nftables backend unless you have your own reasons for needing legacy iptables.

Specifically for docker it is a very common gotcha that the container runtime can and will bypass firewall rules and open ports anyway. Depending on your configuration, those firewall rules in OP may not actually do anything to prevent docker from opening incoming ports.

Newer versions of firewalld gives an easy way to configure this via StrictForwardPorts=yes in /etc/firewalld/firewalld.conf.

>>3np+pm
The problem with firewalld is that it has the worst UX of any program I know. Completely unintuitive options, the program itself doesn’t provide any useful help or hint if you get anything wrong and the documentation is so awful you have to consult the Red Hat manuals that have thankfully been written for those companies that pay thousands per month in support.

It’s not like iptables was any better, but it was more intuitive as it spoke about IPs and ports, not high-level arbitrary constructs such as zones and services defined in some XML file. And since firewalld uses iptables/nftables underneath, I wonder why do I need a worse leaky abstraction on top of what I already know.

I truly hate firewalld.

>>sph+h21
Coming from FreeBSD and pf, all Linux firewalls I’ve tried feels clunky _at best_ UX-wise.

I’d love a Linux firewall configured with a sane config file and I think BSD really nailed it. It’s easy to configure and still human readable, even for more advanced firewall gateway setups with many interfaces/zones.

A have no doubt that Linux can do all the same stuff feature-wise, but oh god the UX :/

>>bingo-+n71
nftables is configured like that https://wiki.nftables.org/wiki-nftables/index.php/Simple_rul...

zlacker