Can someone help please with the below errors
2024-05-07 12:00:01:189 flexisip-message-Starting flexisip proxy-server version 2.3.3
2024-05-07 12:00:01:240 flexisip-error-DoSProtection: '/sbin/iptables -w -F FLEXISIP 2>&1' failed with output 'iptables: No chain/target/match by that name.
'.
2024-05-07 12:00:01:243 flexisip-error-DoSProtection: '/sbin/ip6tables -w -F FLEXISIP 2>&1' failed with output 'ip6tables: No chain/target/match by that name.
'.
2024-05-07 12:00:01:287 flexisip-error-Could not open push notification certificates directory (/etc/flexisip/apn): No such file or directory
2024-05-07 12:00:01:733 flexisip-error-Cannot open domain registration configuration file '/etc/flexisip/domain-registrations.conf'
2024-05-07 13:27:22:993 flexisip-message-Flexisip proxy-server exiting normally.
Thanks and Regards
Varun