berlioz ~ # sysctl -a | grep forward
net.ipv4.conf.all.forwarding = 1
net.ipv4.conf.all.mc_forwarding = 0
net.ipv4.conf.br100.forwarding = 1
net.ipv4.conf.br100.mc_forwarding = 0
net.ipv4.conf.default.forwarding = 1
net.ipv4.conf.default.mc_forwarding = 0
net.ipv4.conf.docker0.forwarding = 1
net.ipv4.conf.docker0.mc_forwarding = 0
net.ipv4.conf.enp2s0.forwarding = 1
net.ipv4.conf.enp2s0.mc_forwarding = 0
net.ipv4.conf.lo.forwarding = 1
net.ipv4.conf.lo.mc_forwarding = 0
net.ipv4.conf.virbr0.forwarding = 1
net.ipv4.conf.virbr0.mc_forwarding = 0
net.ipv4.conf.vnet0.forwarding = 1
net.ipv4.conf.vnet0.mc_forwarding = 0
net.ipv4.ip_forward = 1
net.ipv4.ip_forward_use_pmtu = 0
net.ipv6.conf.all.forwarding = 0
net.ipv6.conf.br100.forwarding = 0
net.ipv6.conf.default.forwarding = 0
net.ipv6.conf.docker0.forwarding = 0
net.ipv6.conf.enp2s0.forwarding = 0
net.ipv6.conf.lo.forwarding = 0
net.ipv6.conf.virbr0.forwarding = 0
net.ipv6.conf.vnet0.forwarding = 0