Document all used network ports

[Obihoernchen]

# Other useful services
SSH           22/tcp
DNS           53/udp
NTP	         123/udp
rsyslog      512/udp

# Ports used by Confluent
httpd         80/tcp
httpd        443/tcp
tftp          69/udp

confluent   4005/tcp HTTP API
confluent  13001/tcp API arming mechanism

confluent     67/udp DHCP SO_REUSEADDR
confluent    547/udp DHCPv6 SO_REUSEADDR	
confluent   4011/udp ProxyDHCP/PXE SO_REUSEADDR

confluent    427/udp SLP (Service Location Protocol) SO_REUSEADDR
confluent   1900/udp SSDP (Simple Service Discovery Protocol) SO_REUSEPORT
confluent   5353/udp mDNS (Multicast DNS) SO_REUSEADDR <-- not active yet

Firewalld notes:

firewalld services:

ssh
dns
(ntp)
(rsyslog)
http
https
tftp
confluent
    dhcp
    dhcpv6
    proxy-dhcp
    slp
    ssdp
    (mdns)
(high-availability) or just 5403/tcp for corosync-qnetd



<?xml version="1.0" encoding="utf-8"?>
<zone>
  <short>zih-confluent</short>
  <description>Zone for deployment via confluent</description>
  <service name="ssh"/>
  <service name="dhcpv6-client"/>
  <service name="dns"/>
  <!-- <service name="ntp"/> -->
  <!-- <service name="syslog"/> -->
  <service name="http"/>
  <service name="https"/>
  <service name="tftp"/>
  <service name="confluent"/>
  <!-- corosync-qnetd for Proxmox -->
  <port protocol="tcp" port="5403"/>
  <forward/>
</zone>


<?xml version="1.0" encoding="utf-8"?>
<service>
  <short>confluent</short>
  <description>Ports used by confluent for deployment and discovery</description>
  <port protocol="tcp" port="4005"/>
  <port protocol="tcp" port="13001"/>
  <!-- DHCP -->
  <include service="dhcp"/>
  <include service="dhcpv6"/>
  <include service="proxy-dhcp"/>
  <!-- Discovery protocols -->
  <include service="slp"/>
  <include service="ssdp"/>
  <!-- <include service="mdns"/> -->
</service>