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tailscale/util/linuxfw
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Irbe Krumina 9bd158cc09
cmd/containerboot,util/linuxfw: create a SNAT rule for dst/src only once, clean up if needed (#13658) 
The AddSNATRuleForDst rule was adding a new rule each time it was called including:
- if a rule already existed
- if a rule matching the destination, but with different desired source already existed

This was causing issues especially for the in-progress egress HA proxies work,
where the rules are now refreshed more frequently, so more redundant rules
were being created.

This change:
- only creates the rule if it doesn't already exist
- if a rule for the same dst, but different source is found, delete it
- also ensures that egress proxies refresh firewall rules
if the node's tailnet IP changes

Updates tailscale/tailscale#13406

Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-10-03 20:15:00 +01:00
..
linuxfwtest util/linuxfw: initial implementation of package 2023-02-09 14:20:24 -05:00
detector.go util/linuxfw: fall back to nftables when iptables not found 2024-09-11 14:36:17 -07:00
fake.go cmd/containerboot,cmd/k8s-operator: enable IPv6 for fqdn egress proxies (#12577) 2024-07-05 12:21:48 +01:00
helpers.go util/slicesx: add FirstElementEqual and LastElementEqual 2024-09-11 18:36:00 -07:00
iptables_for_svcs_test.go cmd/containerboot,kube,util/linuxfw: configure kube egress proxies to route to 1+ tailnet targets (#13531) 2024-09-29 16:30:53 +01:00
iptables_for_svcs.go cmd/containerboot,kube,util/linuxfw: configure kube egress proxies to route to 1+ tailnet targets (#13531) 2024-09-29 16:30:53 +01:00
iptables_runner_test.go cmd/containerboot,util/linuxfw: create a SNAT rule for dst/src only once, clean up if needed (#13658) 2024-10-03 20:15:00 +01:00
iptables_runner.go cmd/containerboot,util/linuxfw: create a SNAT rule for dst/src only once, clean up if needed (#13658) 2024-10-03 20:15:00 +01:00
iptables.go util/linuxfw: fall back to nftables when iptables not found 2024-09-11 14:36:17 -07:00
linuxfw_unsupported.go all: cleanup unused code, part 2 (#10670) 2023-12-21 17:40:03 -08:00
linuxfw.go all: add test for package comments, fix, add comments as needed 2024-07-10 09:57:00 -07:00
nftables_for_svcs_test.go cmd/containerboot,util/linuxfw: create a SNAT rule for dst/src only once, clean up if needed (#13658) 2024-10-03 20:15:00 +01:00
nftables_for_svcs.go cmd/containerboot,kube,util/linuxfw: configure kube egress proxies to route to 1+ tailnet targets (#13531) 2024-09-29 16:30:53 +01:00
nftables_runner_test.go cmd/containerboot,util/linuxfw: create a SNAT rule for dst/src only once, clean up if needed (#13658) 2024-10-03 20:15:00 +01:00
nftables_runner.go cmd/containerboot,util/linuxfw: create a SNAT rule for dst/src only once, clean up if needed (#13658) 2024-10-03 20:15:00 +01:00
nftables_types.go util/linuxfw: add new arch build constraints 2023-06-30 18:22:15 -04:00
nftables.go util/cmpx: delete now that we're using Go 1.22 2024-02-07 18:10:15 -08:00