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afbd1bb89e
The iptables backend (which was used as the model for the nftables backend) used the same "filter" and "nat" tables used by other services on the system (e.g. firewalld or any other host firewall management application), so it was possible that one of those other services would be blocking DNS, DHCP, or TFTP from guests to the host; we added our own rules at the beginning of the chain to allow this traffic no matter if someone else rejected it later. But with nftables, each service uses their own table, and all traffic must be acepted by all tables no matter what - it's not possible for us to just insert a higher priority/earlier rule that will override some reject rule put in by, e.g., firewalld. Instead the firewalld (or other) table must be setup by that service to allow the traffic. That, along with the fact that our table is already "accept by default", makes it possible to eliminate the individual accept rules for DHCP, DNS, and TFTP. And once those rules are eliminated, there is no longer any need for the guest_to_host or host_to_guest tables. Signed-off-by: Laine Stump <laine@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
275 lines
2.7 KiB
Plaintext
275 lines
2.7 KiB
Plaintext
nft \
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rule \
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guest_output \
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iifname \
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counter \
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reject
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guest_input \
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counter \
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reject
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nft \
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rule \
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ip \
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libvirt_network \
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guest_cross \
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iifname \
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virbr0 \
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oifname \
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virbr0 \
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counter \
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accept
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nft \
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rule \
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ip6 \
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libvirt_network \
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guest_output \
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iifname \
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virbr0 \
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counter \
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reject
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nft \
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rule \
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ip6 \
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libvirt_network \
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guest_input \
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oifname \
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virbr0 \
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counter \
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reject
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nft \
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rule \
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ip6 \
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libvirt_network \
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guest_cross \
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iifname \
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virbr0 \
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oifname \
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virbr0 \
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counter \
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accept
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nft \
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rule \
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ip \
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libvirt_network \
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guest_output \
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ip \
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saddr \
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192.168.122.0/24 \
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iifname \
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virbr0 \
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counter \
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accept
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nft \
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rule \
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ip \
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libvirt_network \
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guest_input \
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oifname \
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virbr0 \
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ip \
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daddr \
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192.168.122.0/24 \
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ct \
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state \
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related,established \
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counter \
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accept
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nft \
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-ae insert \
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rule \
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ip \
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libvirt_network \
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guest_nat \
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ip \
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saddr \
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192.168.122.0/24 \
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daddr \
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'!=' \
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192.168.122.0/24 \
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counter \
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masquerade
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nft \
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rule \
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ip \
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libvirt_network \
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guest_nat \
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meta \
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l4proto \
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udp \
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ip \
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saddr \
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192.168.122.0/24 \
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ip \
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daddr \
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'!=' \
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192.168.122.0/24 \
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counter \
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masquerade \
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to \
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:1024-65535
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nft \
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-ae insert \
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rule \
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ip \
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libvirt_network \
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guest_nat \
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meta \
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l4proto \
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tcp \
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ip \
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saddr \
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192.168.122.0/24 \
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daddr \
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'!=' \
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192.168.122.0/24 \
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counter \
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masquerade \
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to \
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:1024-65535
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nft \
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rule \
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libvirt_network \
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guest_nat \
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ip \
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saddr \
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192.168.122.0/24 \
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ip \
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daddr \
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255.255.255.255/32 \
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counter \
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return
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nft \
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libvirt_network \
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guest_nat \
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saddr \
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192.168.122.0/24 \
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daddr \
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224.0.0.0/24 \
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counter \
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return
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nft \
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-ae insert \
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rule \
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ip6 \
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libvirt_network \
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guest_output \
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ip6 \
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saddr \
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2001:db8:ca2:2::/64 \
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iifname \
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virbr0 \
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counter \
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accept
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nft \
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rule \
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ip6 \
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libvirt_network \
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guest_input \
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oifname \
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virbr0 \
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ip6 \
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daddr \
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2001:db8:ca2:2::/64 \
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ct \
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state \
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related,established \
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counter \
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accept
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nft \
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-ae insert \
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rule \
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ip6 \
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libvirt_network \
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guest_nat \
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ip6 \
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saddr \
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2001:db8:ca2:2::/64 \
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ip6 \
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daddr \
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'!=' \
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2001:db8:ca2:2::/64 \
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counter \
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masquerade
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nft \
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-ae insert \
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rule \
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ip6 \
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libvirt_network \
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guest_nat \
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meta \
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l4proto \
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udp \
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ip6 \
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saddr \
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2001:db8:ca2:2::/64 \
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ip6 \
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daddr \
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'!=' \
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2001:db8:ca2:2::/64 \
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counter \
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masquerade \
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to \
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:1024-65535
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nft \
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-ae insert \
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rule \
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ip6 \
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libvirt_network \
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guest_nat \
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meta \
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l4proto \
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tcp \
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ip6 \
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saddr \
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2001:db8:ca2:2::/64 \
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ip6 \
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daddr \
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'!=' \
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2001:db8:ca2:2::/64 \
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counter \
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masquerade \
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to \
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:1024-65535
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nft \
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-ae insert \
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rule \
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ip6 \
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libvirt_network \
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guest_nat \
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ip6 \
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saddr \
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2001:db8:ca2:2::/64 \
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ip6 \
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daddr \
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ff02::/16 \
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counter \
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return
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