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https://github.com/gravitl/netmaker.git
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Merge pull request #1509 from gravitl/feature_v0.15.1_ipv6_egress
IPv6 support for gateways
This commit is contained in:
commit
3ead2b5469
151
logic/gateway.go
151
logic/gateway.go
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@ -37,22 +37,23 @@ func CreateEgressGateway(gateway models.EgressGatewayRequest) (models.Node, erro
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node.EgressGatewayRequest = gateway // store entire request for use when preserving the egress gateway
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node.EgressGatewayRequest = gateway // store entire request for use when preserving the egress gateway
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postUpCmd := ""
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postUpCmd := ""
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postDownCmd := ""
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postDownCmd := ""
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ipv4, ipv6 := getNetworkProtocols(gateway.Ranges)
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logger.Log(3, "creating egress gateway firewall in use is '", node.FirewallInUse, "'")
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logger.Log(3, "creating egress gateway firewall in use is '", node.FirewallInUse, "'")
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if node.OS == "linux" {
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if node.OS == "linux" {
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switch node.FirewallInUse {
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switch node.FirewallInUse {
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case models.FIREWALL_NFTABLES:
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case models.FIREWALL_NFTABLES:
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// nftables only supported on Linux
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// nftables only supported on Linux
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// assumes chains eg FORWARD and POSTROUTING already exist
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// assumes chains eg FORWARD and postrouting already exist
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logger.Log(3, "creating egress gateway nftables is present")
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logger.Log(3, "creating egress gateway nftables is present")
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// down commands don't remove as removal of the rules leaves an empty chain while
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// down commands don't remove as removal of the rules leaves an empty chain while
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// removing the chain with rules in it would remove all rules in that section (not safe
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// removing the chain with rules in it would remove all rules in that section (not safe
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// if there are remaining rules on the host that need to stay). In practice the chain is removed
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// if there are remaining rules on the host that need to stay). In practice the chain is removed
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// when non-empty even though the removal of a non-empty chain should not be possible per nftables wiki.
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// when non-empty even though the removal of a non-empty chain should not be possible per nftables wiki.
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postUpCmd, postDownCmd = firewallNFTCommandsCreateEgress(node.Interface, gateway.Interface, gateway.Ranges, node.EgressGatewayNatEnabled)
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postUpCmd, postDownCmd = firewallNFTCommandsCreateEgress(node.Interface, gateway.Interface, gateway.Ranges, node.EgressGatewayNatEnabled, ipv4, ipv6)
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default: // iptables assumed
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default: // iptables assumed
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logger.Log(3, "creating egress gateway nftables is not present")
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logger.Log(3, "creating egress gateway nftables is not present")
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postUpCmd, postDownCmd = firewallIPTablesCommandsCreateEgress(node.Interface, gateway.Interface, node.EgressGatewayNatEnabled)
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postUpCmd, postDownCmd = firewallIPTablesCommandsCreateEgress(node.Interface, gateway.Interface, node.EgressGatewayNatEnabled, ipv4, ipv6)
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}
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}
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}
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}
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if node.OS == "freebsd" {
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if node.OS == "freebsd" {
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@ -129,7 +130,10 @@ func DeleteEgressGateway(network, nodeid string) (models.Node, error) {
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// needed in case we don't preserve a gateway (i.e., no ingress to preserve)
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// needed in case we don't preserve a gateway (i.e., no ingress to preserve)
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node.PostUp = ""
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node.PostUp = ""
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node.PostDown = ""
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node.PostDown = ""
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cidrs := []string{}
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cidrs = append(cidrs, node.IngressGatewayRange)
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cidrs = append(cidrs, node.IngressGatewayRange6)
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ipv4, ipv6 := getNetworkProtocols(cidrs)
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logger.Log(3, "deleting egress gateway firewall in use is '", node.FirewallInUse, "'")
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logger.Log(3, "deleting egress gateway firewall in use is '", node.FirewallInUse, "'")
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if node.IsIngressGateway == "yes" { // check if node is still an ingress gateway before completely deleting postdown/up rules
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if node.IsIngressGateway == "yes" { // check if node is still an ingress gateway before completely deleting postdown/up rules
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// still have an ingress gateway so preserve it
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// still have an ingress gateway so preserve it
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@ -137,12 +141,12 @@ func DeleteEgressGateway(network, nodeid string) (models.Node, error) {
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switch node.FirewallInUse {
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switch node.FirewallInUse {
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case models.FIREWALL_NFTABLES:
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case models.FIREWALL_NFTABLES:
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// nftables only supported on Linux
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// nftables only supported on Linux
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// assumes chains eg FORWARD and POSTROUTING already exist
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// assumes chains eg FORWARD and postrouting already exist
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logger.Log(3, "deleting egress gateway nftables is present")
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logger.Log(3, "deleting egress gateway nftables is present")
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node.PostUp, node.PostDown = firewallNFTCommandsCreateIngress(node.Interface)
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node.PostUp, node.PostDown = firewallNFTCommandsCreateIngress(node.Interface)
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default:
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default:
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logger.Log(3, "deleting egress gateway nftables is not present")
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logger.Log(3, "deleting egress gateway nftables is not present")
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node.PostUp, node.PostDown = firewallIPTablesCommandsCreateIngress(node.Interface)
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node.PostUp, node.PostDown = firewallIPTablesCommandsCreateIngress(node.Interface, ipv4, ipv6)
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}
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}
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}
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}
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// no need to preserve ingress gateway on FreeBSD as ingress is not supported on that OS
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// no need to preserve ingress gateway on FreeBSD as ingress is not supported on that OS
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@ -180,17 +184,22 @@ func CreateIngressGateway(netid string, nodeid string) (models.Node, error) {
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return models.Node{}, err
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return models.Node{}, err
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}
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}
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node.IsIngressGateway = "yes"
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node.IsIngressGateway = "yes"
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cidrs := []string{}
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cidrs = append(cidrs, network.AddressRange)
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cidrs = append(cidrs, network.AddressRange6)
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node.IngressGatewayRange = network.AddressRange
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node.IngressGatewayRange = network.AddressRange
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node.IngressGatewayRange6 = network.AddressRange6
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ipv4, ipv6 := getNetworkProtocols(cidrs)
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logger.Log(3, "creating ingress gateway firewall in use is '", node.FirewallInUse, "'")
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logger.Log(3, "creating ingress gateway firewall in use is '", node.FirewallInUse, "'")
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switch node.FirewallInUse {
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switch node.FirewallInUse {
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case models.FIREWALL_NFTABLES:
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case models.FIREWALL_NFTABLES:
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// nftables only supported on Linux
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// nftables only supported on Linux
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// assumes chains eg FORWARD and POSTROUTING already exist
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// assumes chains eg FORWARD and postrouting already exist
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logger.Log(3, "creating ingress gateway nftables is present")
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logger.Log(3, "creating ingress gateway nftables is present")
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postUpCmd, postDownCmd = firewallNFTCommandsCreateIngress(node.Interface)
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postUpCmd, postDownCmd = firewallNFTCommandsCreateIngress(node.Interface)
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default:
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default:
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logger.Log(3, "creating ingress gateway using nftables is not present")
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logger.Log(3, "creating ingress gateway using nftables is not present")
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postUpCmd, postDownCmd = firewallIPTablesCommandsCreateIngress(node.Interface)
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postUpCmd, postDownCmd = firewallIPTablesCommandsCreateIngress(node.Interface, ipv4, ipv6)
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}
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}
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if node.PostUp != "" {
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if node.PostUp != "" {
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@ -292,8 +301,8 @@ func firewallNFTCommandsCreateIngress(networkInterface string) (string, string)
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postUp += "nft add rule ip filter FORWARD iifname " + networkInterface + " counter accept ; "
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postUp += "nft add rule ip filter FORWARD iifname " + networkInterface + " counter accept ; "
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postUp += "nft add rule ip filter FORWARD oifname " + networkInterface + " counter accept ; "
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postUp += "nft add rule ip filter FORWARD oifname " + networkInterface + " counter accept ; "
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postUp += "nft add table nat ; "
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postUp += "nft add table nat ; "
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postUp += "nft add chain nat POSTROUTING ; "
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postUp += "nft add chain nat postrouting ; "
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postUp += "nft add rule ip nat POSTROUTING oifname " + networkInterface + " counter masquerade"
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postUp += "nft add rule ip nat postrouting oifname " + networkInterface + " counter masquerade"
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// doesn't remove potentially empty tables or chains
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// doesn't remove potentially empty tables or chains
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postDown := "nft flush table filter ; "
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postDown := "nft flush table filter ; "
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@ -303,61 +312,111 @@ func firewallNFTCommandsCreateIngress(networkInterface string) (string, string)
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}
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}
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// firewallNFTCommandsCreateEgress - used to centralize firewall command maintenance for creating an egress gateway using the nftables firewall.
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// firewallNFTCommandsCreateEgress - used to centralize firewall command maintenance for creating an egress gateway using the nftables firewall.
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func firewallNFTCommandsCreateEgress(networkInterface string, gatewayInterface string, gatewayranges []string, egressNatEnabled string) (string, string) {
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func firewallNFTCommandsCreateEgress(networkInterface string, gatewayInterface string, gatewayranges []string, egressNatEnabled string, ipv4, ipv6 bool) (string, string) {
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// spacing around ; is important for later parsing of postup/postdown in wireguard/common.go
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// spacing around ; is important for later parsing of postup/postdown in wireguard/common.go
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postUp := "nft add table ip filter ; "
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postUp := ""
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postUp += "nft add chain ip filter forward ; "
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postDown := ""
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postUp += "nft add rule filter forward ct state related,established accept ; "
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if ipv4 {
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postUp += "nft add rule ip filter forward iifname " + networkInterface + " accept ; "
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postUp += "nft add table ip filter ; "
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postUp += "nft add rule ip filter forward oifname " + networkInterface + " accept ; "
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postUp += "nft add chain ip filter forward ; "
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postUp += "nft add table nat ; "
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postUp += "nft add rule filter forward ct state related,established accept ; "
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postUp += "nft 'add chain ip nat prerouting { type nat hook prerouting priority 0 ;}' ; "
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postUp += "nft add rule ip filter forward iifname " + networkInterface + " accept ; "
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postUp += "nft 'add chain ip nat postrouting { type nat hook postrouting priority 0 ;}' ; "
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postUp += "nft add rule ip filter forward oifname " + networkInterface + " accept ; "
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for _, networkCIDR := range gatewayranges {
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postUp += "nft add rule nat postrouting iifname " + networkInterface + " oifname " + gatewayInterface + " ip saddr " + networkCIDR + " masquerade ; "
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}
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postDown := "nft flush table filter ; "
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if egressNatEnabled == "yes" {
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postUp += "nft add table nat ; "
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postUp += "nft add table nat ; "
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postUp += "nft add chain nat POSTROUTING ; "
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postUp += "nft 'add chain ip nat prerouting { type nat hook prerouting priority 0 ;}' ; "
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postUp += "nft add rule ip nat POSTROUTING oifname " + gatewayInterface + " counter masquerade ; "
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postUp += "nft 'add chain ip nat postrouting { type nat hook postrouting priority 0 ;}' ; "
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for _, networkCIDR := range gatewayranges {
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postUp += "nft add rule nat postrouting iifname " + networkInterface + " oifname " + gatewayInterface + " ip saddr " + networkCIDR + " masquerade ; "
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}
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postDown += "nft flush table nat ; "
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postDown += "nft flush table filter ; "
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if egressNatEnabled == "yes" {
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postUp += "nft add table nat ; "
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postUp += "nft add chain nat postrouting ; "
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postUp += "nft add rule ip nat postrouting oifname " + gatewayInterface + " counter masquerade ; "
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postDown += "nft flush table nat ; "
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}
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}
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if ipv6 {
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postUp += "nft add table ip6 filter ; "
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postUp += "nft add chain ip6 filter forward ; "
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postUp += "nft add rule ip6 filter forward ct state related,established accept ; "
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postUp += "nft add rule ip6 filter forward iifname " + networkInterface + " accept ; "
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postUp += "nft add rule ip6 filter forward oifname " + networkInterface + " accept ; "
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postDown += "nft flush table ip6 filter ; "
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if egressNatEnabled == "yes" {
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postUp += "nft add table ip6 nat ; "
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postUp += "nft 'add chain ip6 nat prerouting { type nat hook prerouting priority 0 ;}' ; "
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postUp += "nft 'add chain ip6 nat postrouting { type nat hook postrouting priority 0 ;}' ; "
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postUp += "nft add rule ip6 nat postrouting oifname " + gatewayInterface + " masquerade ; "
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postDown += "nft flush table ip6 nat ; "
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}
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}
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}
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return postUp, postDown
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return postUp, postDown
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}
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}
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// firewallIPTablesCommandsCreateIngress - used to centralize firewall command maintenance for creating an ingress gateway using the iptables firewall.
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// firewallIPTablesCommandsCreateIngress - used to centralize firewall command maintenance for creating an ingress gateway using the iptables firewall.
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func firewallIPTablesCommandsCreateIngress(networkInterface string) (string, string) {
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func firewallIPTablesCommandsCreateIngress(networkInterface string, ipv4, ipv6 bool) (string, string) {
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// spacing around ; is important for later parsing of postup/postdown in wireguard/common.go
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postUp := ""
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postUp := "iptables -A FORWARD -i " + networkInterface + " -j ACCEPT ; "
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postDown := ""
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postUp += "iptables -A FORWARD -o " + networkInterface + " -j ACCEPT ; "
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if ipv4 {
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postUp += "iptables -t nat -A POSTROUTING -o " + networkInterface + " -j MASQUERADE"
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// spacing around ; is important for later parsing of postup/postdown in wireguard/common.go
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postUp += "iptables -A FORWARD -i " + networkInterface + " -j ACCEPT ; "
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postUp += "iptables -A FORWARD -o " + networkInterface + " -j ACCEPT ; "
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postUp += "iptables -t nat -A POSTROUTING -o " + networkInterface + " -j MASQUERADE ; "
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// doesn't remove potentially empty tables or chains
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// doesn't remove potentially empty tables or chains
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postDown := "iptables -D FORWARD -i " + networkInterface + " -j ACCEPT ; "
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postDown += "iptables -D FORWARD -i " + networkInterface + " -j ACCEPT ; "
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postDown += "iptables -D FORWARD -o " + networkInterface + " -j ACCEPT ; "
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postDown += "iptables -D FORWARD -o " + networkInterface + " -j ACCEPT ; "
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postDown += "iptables -t nat -D POSTROUTING -o " + networkInterface + " -j MASQUERADE"
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postDown += "iptables -t nat -D POSTROUTING -o " + networkInterface + " -j MASQUERADE ; "
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}
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if ipv6 {
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// spacing around ; is important for later parsing of postup/postdown in wireguard/common.go
|
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postUp += "ip6tables -A FORWARD -i " + networkInterface + " -j ACCEPT ; "
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postUp += "ip6tables -A FORWARD -o " + networkInterface + " -j ACCEPT ; "
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postUp += "ip6tables -t nat -A POSTROUTING -o " + networkInterface + " -j MASQUERADE"
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// doesn't remove potentially empty tables or chains
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postDown += "ip6tables -D FORWARD -i " + networkInterface + " -j ACCEPT ; "
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postDown += "ip6tables -D FORWARD -o " + networkInterface + " -j ACCEPT ; "
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postDown += "ip6tables -t nat -D POSTROUTING -o " + networkInterface + " -j MASQUERADE"
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|
}
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return postUp, postDown
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return postUp, postDown
|
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}
|
}
|
||||||
|
|
||||||
// firewallIPTablesCommandsCreateEgress - used to centralize firewall command maintenance for creating an egress gateway using the iptables firewall.
|
// firewallIPTablesCommandsCreateEgress - used to centralize firewall command maintenance for creating an egress gateway using the iptables firewall.
|
||||||
func firewallIPTablesCommandsCreateEgress(networkInterface string, gatewayInterface string, egressNatEnabled string) (string, string) {
|
func firewallIPTablesCommandsCreateEgress(networkInterface string, gatewayInterface string, egressNatEnabled string, ipv4, ipv6 bool) (string, string) {
|
||||||
// spacing around ; is important for later parsing of postup/postdown in wireguard/common.go
|
// spacing around ; is important for later parsing of postup/postdown in wireguard/common.go
|
||||||
postUp := "iptables -A FORWARD -i " + networkInterface + " -j ACCEPT ; "
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postUp := ""
|
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postUp += "iptables -A FORWARD -o " + networkInterface + " -j ACCEPT"
|
postDown := ""
|
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postDown := "iptables -D FORWARD -i " + networkInterface + " -j ACCEPT ; "
|
if ipv4 {
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postDown += "iptables -D FORWARD -o " + networkInterface + " -j ACCEPT"
|
postUp += "iptables -A FORWARD -i " + networkInterface + " -j ACCEPT ; "
|
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|
postUp += "iptables -A FORWARD -o " + networkInterface + " -j ACCEPT"
|
||||||
|
postDown += "iptables -D FORWARD -i " + networkInterface + " -j ACCEPT ; "
|
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|
postDown += "iptables -D FORWARD -o " + networkInterface + " -j ACCEPT ; "
|
||||||
|
|
||||||
if egressNatEnabled == "yes" {
|
if egressNatEnabled == "yes" {
|
||||||
postUp += " ; iptables -t nat -A POSTROUTING -o " + gatewayInterface + " -j MASQUERADE"
|
postUp += " ; iptables -t nat -A POSTROUTING -o " + gatewayInterface + " -j MASQUERADE ; "
|
||||||
postDown += " ; iptables -t nat -D POSTROUTING -o " + gatewayInterface + " -j MASQUERADE"
|
postDown += " ; iptables -t nat -D POSTROUTING -o " + gatewayInterface + " -j MASQUERADE ; "
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
if ipv6 {
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||||||
|
postUp += "ip6tables -A FORWARD -i " + networkInterface + " -j ACCEPT ; "
|
||||||
|
postUp += "ip6tables -A FORWARD -o " + networkInterface + " -j ACCEPT ; "
|
||||||
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postDown += "ip6tables -D FORWARD -i " + networkInterface + " -j ACCEPT ; "
|
||||||
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postDown += "ip6tables -D FORWARD -o " + networkInterface + " -j ACCEPT ; "
|
||||||
|
|
||||||
|
if egressNatEnabled == "yes" {
|
||||||
|
postUp += " ; ip6tables -t nat -A POSTROUTING -o " + gatewayInterface + " -j MASQUERADE"
|
||||||
|
postDown += " ; ip6tables -t nat -D POSTROUTING -o " + gatewayInterface + " -j MASQUERADE"
|
||||||
|
}
|
||||||
|
}
|
||||||
return postUp, postDown
|
return postUp, postDown
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
|
@ -169,3 +169,20 @@ func ShouldPublishPeerPorts(serverNode *models.Node) bool {
|
||||||
}
|
}
|
||||||
return false
|
return false
|
||||||
}
|
}
|
||||||
|
|
||||||
|
func getNetworkProtocols(cidrs []string) (bool, bool) {
|
||||||
|
ipv4 := false
|
||||||
|
ipv6 := false
|
||||||
|
for _, cidr := range cidrs {
|
||||||
|
ip, _, err := net.ParseCIDR(cidr)
|
||||||
|
if err != nil {
|
||||||
|
continue
|
||||||
|
}
|
||||||
|
if ip.To4() == nil {
|
||||||
|
ipv6 = true
|
||||||
|
} else {
|
||||||
|
ipv4 = true
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return ipv4, ipv6
|
||||||
|
}
|
||||||
|
|
|
@ -77,6 +77,7 @@ type Node struct {
|
||||||
EgressGatewayRequest EgressGatewayRequest `json:"egressgatewayrequest" bson:"egressgatewayrequest" yaml:"egressgatewayrequest"`
|
EgressGatewayRequest EgressGatewayRequest `json:"egressgatewayrequest" bson:"egressgatewayrequest" yaml:"egressgatewayrequest"`
|
||||||
RelayAddrs []string `json:"relayaddrs" bson:"relayaddrs" yaml:"relayaddrs"`
|
RelayAddrs []string `json:"relayaddrs" bson:"relayaddrs" yaml:"relayaddrs"`
|
||||||
IngressGatewayRange string `json:"ingressgatewayrange" bson:"ingressgatewayrange" yaml:"ingressgatewayrange"`
|
IngressGatewayRange string `json:"ingressgatewayrange" bson:"ingressgatewayrange" yaml:"ingressgatewayrange"`
|
||||||
|
IngressGatewayRange6 string `json:"ingressgatewayrange6" bson:"ingressgatewayrange6" yaml:"ingressgatewayrange6"`
|
||||||
// IsStatic - refers to if the Endpoint is set manually or dynamically
|
// IsStatic - refers to if the Endpoint is set manually or dynamically
|
||||||
IsStatic string `json:"isstatic" bson:"isstatic" yaml:"isstatic" validate:"checkyesorno"`
|
IsStatic string `json:"isstatic" bson:"isstatic" yaml:"isstatic" validate:"checkyesorno"`
|
||||||
UDPHolePunch string `json:"udpholepunch" bson:"udpholepunch" yaml:"udpholepunch" validate:"checkyesorno"`
|
UDPHolePunch string `json:"udpholepunch" bson:"udpholepunch" yaml:"udpholepunch" validate:"checkyesorno"`
|
||||||
|
@ -370,6 +371,9 @@ func (newNode *Node) Fill(currentNode *Node) { // TODO add new field for nftable
|
||||||
if newNode.IngressGatewayRange == "" {
|
if newNode.IngressGatewayRange == "" {
|
||||||
newNode.IngressGatewayRange = currentNode.IngressGatewayRange
|
newNode.IngressGatewayRange = currentNode.IngressGatewayRange
|
||||||
}
|
}
|
||||||
|
if newNode.IngressGatewayRange6 == "" {
|
||||||
|
newNode.IngressGatewayRange6 = currentNode.IngressGatewayRange6
|
||||||
|
}
|
||||||
if newNode.IsStatic == "" {
|
if newNode.IsStatic == "" {
|
||||||
newNode.IsStatic = currentNode.IsStatic
|
newNode.IsStatic = currentNode.IsStatic
|
||||||
}
|
}
|
||||||
|
|
|
@ -151,14 +151,13 @@ type ExtPeersResponse struct {
|
||||||
|
|
||||||
// EgressGatewayRequest - egress gateway request
|
// EgressGatewayRequest - egress gateway request
|
||||||
type EgressGatewayRequest struct {
|
type EgressGatewayRequest struct {
|
||||||
NodeID string `json:"nodeid" bson:"nodeid"`
|
NodeID string `json:"nodeid" bson:"nodeid"`
|
||||||
NetID string `json:"netid" bson:"netid"`
|
NetID string `json:"netid" bson:"netid"`
|
||||||
RangeString string `json:"rangestring" bson:"rangestring"`
|
NatEnabled string `json:"natenabled" bson:"natenabled"`
|
||||||
NatEnabled string `json:"natenabled" bson:"natenabled"`
|
Ranges []string `json:"ranges" bson:"ranges"`
|
||||||
Ranges []string `json:"ranges" bson:"ranges"`
|
Interface string `json:"interface" bson:"interface"`
|
||||||
Interface string `json:"interface" bson:"interface"`
|
PostUp string `json:"postup" bson:"postup"`
|
||||||
PostUp string `json:"postup" bson:"postup"`
|
PostDown string `json:"postdown" bson:"postdown"`
|
||||||
PostDown string `json:"postdown" bson:"postdown"`
|
|
||||||
}
|
}
|
||||||
|
|
||||||
// RelayRequest - relay request struct
|
// RelayRequest - relay request struct
|
||||||
|
|
Loading…
Reference in a new issue