Why? Unless you get the same IP address when you re-enable the interface, the server won’t know what to do with the FIN anyway. Andreas’s description is correct. I’d describe this as a bug in Linux. --Amanda I just thought FIN's are handled the same way as any other data. Anyway I'm fine with that, just wanted to get an idea what's right here. So thx all. _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.... This email sent to site_archiver@lists.apple.com I could not find any exception in the RFC for FIN packets regarding reliability of TCP.