2025-07-30 22:45:45,005 fail2ban.utils          [20431]: ERROR   72995020 -- exec: ipset -exist create f2b-nginx-bad-request hash:ip timeout 0
for proto in $(echo 'tcp' | sed 's/,/ /g'); do
{ iptables -w -C INPUT -p $proto --dport http,https -m set --match-set f2b-nginx-bad-request src -j REJECT --reject-with icmp-port-unreachable >/dev/null 2>&1; } || { iptables -w -I INPUT -p $proto --dport http,https
-m set --match-set f2b-nginx-bad-request src -j REJECT --reject-with icmp-port-unreachable; }
done
2025-07-30 22:45:45,046 fail2ban.utils          [20431]: ERROR   72995020 -- stderr: "**iptables v1.8.9 (nf_tables): *invalid port/service** `http,https' specified"*
2025-07-30 22:45:45,059 fail2ban.utils          [20431]: ERROR   72995020 -- stderr: "Try `iptables -h' or 'iptables --help' for more information."
2025-07-30 22:45:45,076 fail2ban.utils          [20431]: ERROR   72995020 -- returned 2
2025-07-30 22:45:45,089 fail2ban.actions        [20431]: ERROR   Failed to execute ban jail 'nginx-bad-request' action 'iptables-ipset' info 'ActionInfo({'ip': '101.251.238.174', 'family': 'inet4', 'fid': <function Ac
tions.ActionInfo.<lambda> at 0x75aba5c8>, 'raw-ticket': <function Actions.ActionInfo.<lambda> at 0x75aba988>})': Error starting action Jail('nginx-bad-request')/iptables-ipset: 'Script error'
2025-07-30 22:45:45,155 fail2ban.actions        [20431]: NOTICE  [nginx-bad-request] Restore Ban 103.149.26.131

2025-07-30 22:37:31,096 fail2ban.utils          [14657]: ERROR   729dba70 -- exec: ipset -exist add f2b-sendmail-reject 103.114.217.196 timeout 0
2025-07-30 22:37:31,100 fail2ban.utils          [14657]: ERROR   729dba70 -- stderr: 'ipset v7.17: Timeout cannot be used: set was created without timeout support'
2025-07-30 22:37:31,103 fail2ban.utils          [14657]: ERROR   729dba70 -- returned 1