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If you are using glibc you can use the undocumented use-vc option (see resolv/res_init.c in the glib source code) which forces the libc resolver to always use TCP. Either set it globally in resolv.conf: options use-vc nameserver Or pass the option in the environment: RES_OPTIONS=use-vc firefox It will not work if the application implemented ...


FIN is an abbreviation for "Finish" Reference TCP Connection Termination : In the normal case, each side terminates its end of the connection by sending a special message with the FIN (finish) bit set. This message, sometimes called a FIN, serves as a connection termination request to the other device, while also possibly carrying data like a regular ...

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