proxy: opt-out from SNAT for L7 + Tunnel for some scenarios #29594
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Currently the L7 proxy performs SNAT for traffic when tunnel routing is enabled, even for cluster-internal traffic. This prevents cilium_host from detecting pod-level traffic, and we thus can't apply features. Modify SupportsOriginalSourceAddr(), so that the proxy doesn't SNAT such traffic when some conditions are met. Signed-off-by: Zhichuan Liang <gray.liang@isovalent.com>
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julianwiedmann
requested changes
Dec 13, 2023
GKE has DROP policy for filter table, so we have to explicitly accept proxy traffic. Signed-off-by: Zhichuan Liang <gray.liang@isovalent.com>
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jrajahalme
approved these changes
Dec 14, 2023
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Comment on the PR description/commit message: While it may look like it, there is no SNAT involved with the L7 proxy. The forwarded connection is merely a new one originating from the host networking namespace. |
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This was referenced Mar 13, 2024
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Currently the L7 proxy performs SNAT for traffic when tunnel routing is enabled, even for cluster-internal traffic. This prevents cilium_host from detecting pod-level traffic, and we thus can't apply features.
Modify SupportsOriginalSourceAddr(), so that the proxy doesn't SNAT such traffic when some conditions are met.