Tink vs firewalld
firewalld is the dynamic firewall on RHEL, Alma, Rocky, and Fedora. It is not a mechanic. Tink installs in one command, watches the Linux host, explains what is wrong, and helps you fix it.
firewall-cmd --reload. Tink answers “why is this VPS sick?”
Accidental sysadmins land on firewalld because the RHEL docs say firewall-cmd --permanent --add-service=http after the first SSH login. Then disk is at 91%, nginx dies, and last night's public zone does not say what to run. A filling /var is a Tink warning; it is not a rich rule.
Tink is the other job: detect the issue on the machine, say why it happened in plain English, propose the command, and run it only after you approve. Keep using firewalld if you already want a host firewall. Use Tink if you run Linux servers and want a mechanic. They can sit on the same box.
| Feature | Tink | firewalld |
|---|---|---|
| Setup time | 30 seconds (one curl | sh command) | dnf install firewalld, start the service, pick a zone, add http/https/ssh, --permanent, --reload — then you still SSH in when the box is sick |
| What you get | Working monitoring, diagnosis, and approved fixes | Dynamic nftables frontend — zones, services, rich rules, sources. Not a fleet mechanic |
| Pricing | Free (Scout) / $9 / $29 per machine per month | Open source. You still pay the person who reads firewall-cmd --list-all after the outage |
| Hidden costs | None — fully managed | Zone drift, runtime vs permanent, Docker bypassing FORWARD, and whether anyone watched disk while public was the default zone |
| Monitoring approach | Agent on the server — CPU, disk, services, logs, certs, ports | Packet filter only. firewalld does not watch fill time or propose a restart |
| Configuration | None after install — heuristics and AI | firewalld.conf, zone XML, rich rules, and whether --runtime-to-permanent actually stuck |
| Plain-English diagnosis | Yes — AI explains root cause, impact, and fix | No — you read firewall-cmd --list-all and nft list ruleset yourself |
| Fix execution | Proposes and executes approved commands with an audit trail | Opens and closes ports only — firewalld cannot restart nginx, free disk, or rotate a cert |
| Alerting | Built-in across 8 channels | None. A silent drop in the public zone is not a Telegram page |
| Predictive alerts | Yes — disk fills in ~6 days, memory and CPU trends | Live packet filter only — firewalld does not forecast fill time or a quiet NIC going bad later |
| Firewall / port exposure | Built-in — warns when the host firewall is inactive or dangerous DB ports listen | Yes for zones/services — that is the job. It still will not say Redis is bound to 0.0.0.0 |
| Machine offline detection | Agent presence monitoring with multi-channel alerts | If the host is down, firewalld is down too — no presence ping to Telegram |
| Public status page | Shareable URL with 90-day history | Not included — firewalld has no customer-facing status page |
| Weekly fleet digest | Automated Monday digest + daily brief when issues are open | Not included — a zone list is not a plain-English fleet narrative |
| On-call tracking | Built-in /oncall command + incident acknowledgment | Not included — wire something else into PagerDuty |
| Conversation interface | Telegram, WhatsApp, web dashboard, CLI | SSH + firewall-cmd. No mechanic you text when /var filled |
| Learning curve | None — works after install | Low to --add-service=ssh; higher to keep zones, rich rules, and runtime vs permanent honest |
| Best for | Freelancers, small teams, accidental sysadmins (1-50 Linux servers) | Operators who already want a host firewall on RHEL and will still SSH in when the box is sick |
When firewalld is the right choice
Keep using firewalld when you already want that exact job:
- Host firewall — you need zones and services on this RHEL box, not a fleet digest.
- Packet filter — firewalld talks to nftables; it is not a mechanic.
- No extra service — a daemon you install on the box, not a hub, SaaS, or Telegram bot.
- No conversation layer wanted — some operators prefer zone XML and will never use a mechanic.
The real cost of “just enable firewalld”
The package is cheap to install. A working ops loop for five Linux boxes is not:
- A complete public zone still means you SSH into the host and change the box by hand when it gets sick
- Host fill, nginx, certs, and a quiet agent never appear unless you built extra checks
- A filling /var is a Tink disk warning on every scan — firewalld stays a zone list until you are looking
- A single VPS with nobody logged in still needs a mechanic, not another allowed source
For a 5-server team, Tink Mechanic at $45/month is cheaper than the engineer who opens firewall-cmd --list-all after the outage, and every scan includes a diagnosis a quiet firewall will not type.
No SSH homework. No silent host. One command install.
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