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The previous commit created new chains to hold the firewall rules. This commit changes the code that creates rules to place them in the new private chains instead of the builtin top level chains. With two networks running, the rules in the filter table now look like -N LIBVIRT_FWI -N LIBVIRT_FWO -N LIBVIRT_FWX -N LIBVIRT_INP -N LIBVIRT_OUT -A INPUT -j LIBVIRT_INP -A FORWARD -j LIBVIRT_FWX -A FORWARD -j LIBVIRT_FWI -A FORWARD -j LIBVIRT_FWO -A OUTPUT -j LIBVIRT_OUT -A LIBVIRT_FWI -d 192.168.0.0/24 -o virbr0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A LIBVIRT_FWI -o virbr0 -j REJECT --reject-with icmp-port-unreachable -A LIBVIRT_FWI -d 192.168.1.0/24 -o virbr1 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT -A LIBVIRT_FWI -o virbr1 -j REJECT --reject-with icmp-port-unreachable -A LIBVIRT_FWO -s 192.168.0.0/24 -i virbr0 -j ACCEPT -A LIBVIRT_FWO -i virbr0 -j REJECT --reject-with icmp-port-unreachable -A LIBVIRT_FWO -s 192.168.1.0/24 -i virbr1 -j ACCEPT -A LIBVIRT_FWO -i virbr1 -j REJECT --reject-with icmp-port-unreachable -A LIBVIRT_FWX -i virbr0 -o virbr0 -j ACCEPT -A LIBVIRT_FWX -i virbr1 -o virbr1 -j ACCEPT -A LIBVIRT_INP -i virbr0 -p udp -m udp --dport 53 -j ACCEPT -A LIBVIRT_INP -i virbr0 -p tcp -m tcp --dport 53 -j ACCEPT -A LIBVIRT_INP -i virbr0 -p udp -m udp --dport 67 -j ACCEPT -A LIBVIRT_INP -i virbr0 -p tcp -m tcp --dport 67 -j ACCEPT -A LIBVIRT_INP -i virbr1 -p udp -m udp --dport 53 -j ACCEPT -A LIBVIRT_INP -i virbr1 -p tcp -m tcp --dport 53 -j ACCEPT -A LIBVIRT_INP -i virbr1 -p udp -m udp --dport 67 -j ACCEPT -A LIBVIRT_INP -i virbr1 -p tcp -m tcp --dport 67 -j ACCEPT -A LIBVIRT_OUT -o virbr0 -p udp -m udp --dport 68 -j ACCEPT -A LIBVIRT_OUT -o virbr1 -p udp -m udp --dport 68 -j ACCEPT While in the nat table: -N LIBVIRT_PRT -A POSTROUTING -j LIBVIRT_PRT -A LIBVIRT_PRT -s 192.168.0.0/24 -d 224.0.0.0/24 -j RETURN -A LIBVIRT_PRT -s 192.168.0.0/24 -d 255.255.255.255/32 -j RETURN -A LIBVIRT_PRT -s 192.168.0.0/24 ! -d 192.168.0.0/24 -p tcp -j MASQUERADE --to-ports 1024-65535 -A LIBVIRT_PRT -s 192.168.0.0/24 ! -d 192.168.0.0/24 -p udp -j MASQUERADE --to-ports 1024-65535 -A LIBVIRT_PRT -s 192.168.0.0/24 ! -d 192.168.0.0/24 -j MASQUERADE -A LIBVIRT_PRT -s 192.168.1.0/24 -d 224.0.0.0/24 -j RETURN -A LIBVIRT_PRT -s 192.168.1.0/24 -d 255.255.255.255/32 -j RETURN -A LIBVIRT_PRT -s 192.168.1.0/24 ! -d 192.168.1.0/24 -p tcp -j MASQUERADE --to-ports 1024-65535 -A LIBVIRT_PRT -s 192.168.1.0/24 ! -d 192.168.1.0/24 -p udp -j MASQUERADE --to-ports 1024-65535 -A LIBVIRT_PRT -s 192.168.1.0/24 ! -d 192.168.1.0/24 -j MASQUERADE And finally the mangle table: -N LIBVIRT_PRT -A POSTROUTING -j LIBVIRT_PRT -A LIBVIRT_PRT -o virbr0 -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill -A LIBVIRT_PRT -o virbr1 -p udp -m udp --dport 68 -j CHECKSUM --checksum-fill Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
108 lines
2.0 KiB
Plaintext
108 lines
2.0 KiB
Plaintext
iptables \
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--table filter \
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--insert LIBVIRT_INP \
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--in-interface virbr0 \
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--protocol tcp \
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--destination-port 67 \
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--jump ACCEPT
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iptables \
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--table filter \
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--insert LIBVIRT_INP \
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--in-interface virbr0 \
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--protocol udp \
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--destination-port 67 \
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--jump ACCEPT
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iptables \
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--table filter \
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--insert LIBVIRT_OUT \
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--out-interface virbr0 \
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--protocol udp \
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--destination-port 68 \
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--jump ACCEPT
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iptables \
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--table filter \
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--insert LIBVIRT_INP \
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--in-interface virbr0 \
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--protocol tcp \
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--destination-port 53 \
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--jump ACCEPT
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iptables \
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--table filter \
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--insert LIBVIRT_INP \
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--in-interface virbr0 \
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--protocol udp \
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--destination-port 53 \
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--jump ACCEPT
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iptables \
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--table filter \
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--insert LIBVIRT_FWO \
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--in-interface virbr0 \
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--jump REJECT
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iptables \
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--table filter \
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--insert LIBVIRT_FWI \
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--out-interface virbr0 \
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--jump REJECT
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iptables \
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--table filter \
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--insert LIBVIRT_FWX \
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--in-interface virbr0 \
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--out-interface virbr0 \
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--jump ACCEPT
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iptables \
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--table filter \
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--insert LIBVIRT_FWO \
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--source 192.168.122.0/24 \
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--in-interface virbr0 \
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--jump ACCEPT
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iptables \
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--table filter \
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--insert LIBVIRT_FWI \
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--destination 192.168.122.0/24 \
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--out-interface virbr0 \
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--match conntrack \
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--ctstate ESTABLISHED,RELATED \
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--jump ACCEPT
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iptables \
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--table nat \
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--insert LIBVIRT_PRT \
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--source 192.168.122.0/24 '!' \
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--destination 192.168.122.0/24 \
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--jump MASQUERADE
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iptables \
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--table nat \
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--insert LIBVIRT_PRT \
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--source 192.168.122.0/24 \
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-p udp '!' \
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--destination 192.168.122.0/24 \
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--jump MASQUERADE \
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--to-ports 1024-65535
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iptables \
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--table nat \
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--insert LIBVIRT_PRT \
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--source 192.168.122.0/24 \
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-p tcp '!' \
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--destination 192.168.122.0/24 \
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--jump MASQUERADE \
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--to-ports 1024-65535
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iptables \
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--table nat \
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--insert LIBVIRT_PRT \
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--source 192.168.122.0/24 \
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--destination 255.255.255.255/32 \
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--jump RETURN
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iptables \
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--table nat \
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--insert LIBVIRT_PRT \
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--source 192.168.122.0/24 \
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--destination 224.0.0.0/24 \
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--jump RETURN
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iptables \
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--table mangle \
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--insert LIBVIRT_PRT \
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--out-interface virbr0 \
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--protocol udp \
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--destination-port 68 \
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--jump CHECKSUM \
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--checksum-fill
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