https://onwar.se/ 2026-10-02T19:25:21+00:00 https://onwar.se/ https://onwar.se/lib/exe/fetch.php?media=wiki:dokuwiki.svg text/html 2026-10-02T08:29:27+00:00 Anonymous (anonymous@undisclosed.example.com) https://onwar.se/doku.php?id=fixing_ftp_port_21_blocked_by_isp:a_comprehensive_guide&rev=1790929767&do=diff Intrusion Detection and Prevention: Many modern firewalls include intrusion detection systems (IDS) and intrusion prevention systems (IPS) that monitor traffic for suspicious activity. If an attack is detected, the firewall can take immediate action to block the offending traffic.