network sockets: Convert outgoing "any" address to loopback#2142
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francescolavra merged 1 commit intomasterfrom Mar 7, 2026
Merged
network sockets: Convert outgoing "any" address to loopback#2142francescolavra merged 1 commit intomasterfrom
francescolavra merged 1 commit intomasterfrom
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…opback Even though the "any" IP address (i.e. 0.0.0.0 for IPv4, [::] for IPv6) is not a valid routable destination address according to RFC standards (is only valid for binding a server to listen on all available interfaces), on Unix-like OSes outgoing network packets destined to this address are redirected to the loopback address. And a few user programs rely on this behavior.
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Even though the "any" IP address (i.e. 0.0.0.0 for IPv4, [::] for IPv6) is not a valid routable destination address according to RFC standards (is only valid for binding a server to listen on all available interfaces), on Unix-like OSes outgoing network packets destined to this address are redirected to the loopback address. And a few user programs rely on this behavior.