[IMP] Switch from socat to iptables-based transparent TCP proxy#29
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[IMP] Switch from socat to iptables-based transparent TCP proxy#29josep-tecnativa wants to merge 2 commits intomasterfrom
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This PR replaces the per-port socat model with a single asyncio-based
transparent TCP proxy using iptables NAT REDIRECT and SO_ORIGINAL_DST.
The previous implementation spawned one socat process per port, which
introduced scalability and reliability issues (thread/process explosion,
resource consumption, restart complexity, DNS update handling, etc.).
The new design:
By default, all TCP ports are now allowed unless PORT is explicitly set.
Requires CAP_NET_ADMIN.