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Rafi
@rafi
Spent last 3h figuring out why a server is not reachable in the network. Turned out the DNS was pointing to its private IPv6 address and the server was listening on IPv4 :') Why? Catch-all addresses like 0.0.0.0 in IPv4 and [::] in IPv6 are handled by two separate network interfaces in the OS. Quite obvious but easy to miss.
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Royal
@royalaid.eth
Network issues 90% of the time boil down to DNS
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