1tcpmd5 from 1.1.1.1 to 2.2.2.2 spi 0x00002000 authkey 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 2tcpmd5 from 2.2.2.2 to 1.1.1.1 spi 0x00002001 authkey 0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa 3