IPTables

You must ensure that no rule exists in iptables or firewalld that will prevent PTP packets from reaching the slave sfptpd process.

• The following command is a useful starting point to examine iptables rules:

  # iptables -L

  The iptables service can be temporarily disabled to identify if it is responsible for blocking PTP traffic:

  # service iptables stop

• Firewalld can be temporarily disabled to identify if it is responsible for blocking PTP traffic:

  # systemctl stop firewalld