diff --git a/docs/handbook/infrastructure/servers_and_hosting/hetzner.md b/docs/handbook/infrastructure/servers_and_hosting/hetzner.md
index 424c167..669107e 100644
--- a/docs/handbook/infrastructure/servers_and_hosting/hetzner.md
+++ b/docs/handbook/infrastructure/servers_and_hosting/hetzner.md
@@ -22,4 +22,13 @@
     - Primary: :flag_us: `ashburn`
     - Secondary: :flag_us: `hillsboro`
 
-**Dedicated**: All Hetzner dedicated servers are in :flag_eu: Europe, no particularly preferred datacenters.
\ No newline at end of file
+**Dedicated**: All Hetzner dedicated servers are in :flag_eu: Europe, no particularly preferred datacenters.
+
+## Firewalls
+Typical firewalls used on most cloud:
+
+`allow_Beszel_agent_45876` - inbound `TCP`, port `45876`; inbound `ICMP`
+
+`allow_web` - inbound `ICMP`; inbound `TCP`, port `80`; inbound `TCP`, port `443`
+
+`allow_ssh22` - inbound `TCP`, port `22`; inbound `ICMP`
\ No newline at end of file