• anyone gaining physical or remote access to the device can set rules. by protecting the entire network with a hardware firewall you mitigate attack vectors from other hardware on your network that become compromised.
• iptables and firewalld are notorious for locking users out of the system by overzealous or green system admins. in the msp world this happens practically by the hour.
• iptables and firewalld can be used against you in the event of a breach. one of the first things an attacker may attempt is to forward ports and lock system admins out as they take over the system.
• make sure you save your rules properly or they’ll be gone after a reboot or botched upgrade
• migrating your rules from one system to another when you’re changing hardware or restoring a system is a huge pain in the ass.
• got a network change that’s going to modify the subnet your systems are on? get ready to migrate all 15 of your devices one by one for the next 8-15 hours (depending on the complexity of your rules)

it’s far easier, and safer to have all your network config done in the network. from system migrations to securing/hardening. it’s far more efficient and effective to have a single source of truth that manages network routing and firewall rules. hell, you can even have a redundant or load balanced firewall configuration if you’re afraid of a single point of failure.

point is, firewalld and iptables is for amateur hour and hobbyists.

if you want to complain that “docker doesn’t respect system firewalls” then at least have the chutzpah enough to do it the right way from the beginning.

would have been even better if they were tweets by them.

oh look, another jellyfin circle jerk.

What if you rent a bare metal server in a data center?

any msp will work with your security requirements for a cost. if you can’t afford it, then you shouldn’t be using a msp.

Or rent a VPS from a basic provider that expects you to do your own firewalling?

find a better msp. if a vendor you’re paying tells you to fuck off with your requirements for a secure system, they are telling you that you don’t matter to them and their only goal is to take your money.

Or run your home lab docker host on the same vlan as other less trusted hosts?

don’t? IDK what to tell you if you understand what a vlan is and still refuse to set one up properly to segment your network securely.

It would be nice if there was a reliable way to run a firewall on the same host that’s running docker.

don’t confuse reliable with convenient. iptables and firewalld are not reliable, but they are certainly convenient.

You may say these are obscure use cases and that they are Wrong and Bad. Maybe you’re right, but personally I think it’s an unfortunate gap in expected functionality, if for no other reason than defense-in-depth.

poor network architecture is no excuse. do it the proper way or you’re going to get your shit exposed one day.

this is the second time I’ve seen a post like this.

docker has always been like this. if it’s news to you then you must be new to docker.

if you’re using the built in firewall to secure your system on your wan, you’re doing it wrong. get a physical firewall. if you’re doing it to secure your lan then you just need to put in some proper routes and let your hardware firewall sort it out with some vlans.

don’t rely on firewalld or iptables for anything.

I could use a bit more time as a boy instead of a man if she’s the one doing it.

don’t think of yourself as old, think of yourself as cultured.

they just don’t make movies like that anymore.

that’s not Nicholas Cage. that’s Daniel Jackson!

I had several IOT smart plugs that have GPS built in.

why? why would it need to know its exact geographic location?!

after that I created an entire hardware segmented network that’s specifically used for IOT and cameras.

last I checked the router/firewall it’s on has blocked over 11million requests a month trying to access the outside.

I will never have a “smart” device in my home that’s connected to the internet. I’ll live like it’s the 1930s if I ever have to.

goat is the goat! so juicy and tender. it’s like the best pork and dark meat chicken you’ve ever had.

this movie is good man!

– Siskel & Ebert

aaaand meet my block list.

beautiful