It will require support from ip6tables-mod-nat. The added functionality will be skipped otherwise. For $o_dst_bypass6_, include only address blocks in link [1] whose "Globally Reachable" field are explicitly "False" Closes openwrt/packages#7508 [1] IANA IPv6 Special-Purpose Address Registry, https://www.iana.org/assignments/iana-ipv6-special-registry/iana-ipv6-special-registry.xhtml Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>