firewall6(8) IPv6 firewall6(8) (NAME) firewall6 - ACL (SYNOPSIS) firewall6 [-Hu] interface destination port [test-case-no] (DESCRIPTION) firewall6 (ACL) . ICMPv6 . (OPTIONS) -H (hop count). -u UDP ( TCP ). (AUTHOR) thc-ipv6 van Hauser / THC . : https://github.com/vanhauser-thc/thc- ipv6 (COPYRIGHT) firewall6 3.8 (c) 2020 by van Hauser / THC https://github.com/vanhauser-thc/thc-ipv6 THC 2026-02-07 firewall6(8)