Quote from: Monviech (Cedrik) on November 01, 2026, 12:08:34 PMPF has an allow-opts filter-rule modifier. By default, PF blocks packets containing IPv4 options. A pass rule needs allow-opts to permit them.So as long as you haven't created any Manual Firewall Rules that Allow TCP traffic to have 'allow-opts' included then even outdated Linux based devices are completely safe behind your OPNsense/FreeBSD based Firewall ?
If you check your ruleset in /tmp/rules.debug you can grep if your ruleset contains rules with allow-opts.
Also if its on a non quick automatic rule that would allow-opts, you can create a quick rule in the same direction that blocks options.
Quote from: nero355 on October 31, 2026, 10:11:50 PMLOL! ^_^
Quote from: Patrick M. Hausen on November 01, 2026, 05:28:33 PMI'd start with Cisco CCNA textbooks or Rich Stevens' "TCP/IP Illustrated, Volume I". Also recommended: Radia Perlman, "Interconnections - Bridges and Routers".
Quote from: Patrick M. Hausen on November 01, 2026, 05:00:03 PMIch weiß nicht, wie Wazuh funktioniert, aber die Access Logs von Caddy landen in /var/log/caddy/access/*, nicht in /var/ossec/logs/opnsense_syslog.log.