VyOS command definitions, scripts, and utilities (mirror of https://github.com/vyos/vyos-1x.git) https://git.amelek.net/vyos/vyos-1x.git/atom?h=feature%2FT9082-codeql-cpp 2023-09-19T11:08:20+00:00 2023-09-19T11:08:20+00:00 sarthurdev 965089+sarthurdev@users.noreply.github.com 2023-09-15T16:31:17+00:00 urn:sha1:41133869c50cd691735a141722dbca72827191e5 `set firewall flowtable <name> interface <ifname>` `set firewall flowtable <name> offload [software|hardware]` `set firewall [ipv4|ipv6] forward filter rule N action offload` `set firewall [ipv4|ipv6] forward filter rule N offload-target <name>` 2023-09-09T08:16:04+00:00 Yuxiang Zhu vfreex@gmail.com 2023-08-26T05:28:11+00:00 urn:sha1:f909c17aca4d48598d5eaee0df81bf64967902f0 The following commands will enable nftables flowtable offload on interfaces eth0 eth1: ``` set firewall global-options flow-offload software interface <name> set firewall global-options flow-offload hardware interface <name> ``` Generated nftables rules: ``` table inet vyos_offload { flowtable VYOS_FLOWTABLE_software { hook ingress priority filter - 1; devices = { eth0, eth1, eth2, eth3 }; counter } chain VYOS_OFFLOAD_software { type filter hook forward priority filter - 1; policy accept; ct state { established, related } meta l4proto { tcp, udp } flow add @VYOS_FLOWTABLE_software } } ``` Use this option to count packets and bytes for each offloaded flow: ``` set system conntrack flow-accounting ``` To verify a connection is offloaded, run ``` cat /proc/net/nf_conntrack|grep OFFLOAD ``` This PR follows firewalld's implementation: https://github.com/firewalld/firewalld/blob/e748b97787d685d0ca93f58e8d4292e87d3f0da6/src/firewall/core/nftables.py#L590 A good introduction to nftables flowtable: https://thermalcircle.de/doku.php?id=blog:linux:flowtables_1_a_netfilter_nftables_fastpath