java - Socket stealth kill -


assuming have 2 nodes.

1.2.3.4 (master) , 3.4.5.6 (slave), written in java.

i want slave accept socket connections (2 way tls) 1.2.3.4 (configured prior) only, , ignore others stealthily not responding if it's not 1.2.3.4, , if 2 way tls authentication fails.

meaning, don't send rst in tcp. socket.close(); should close socket on slave's end, not send rst connecting peer peer not know if valid open port or not (normally consumed software/hardware firewalls adversaries that're doing syn/ack scans).

how achieve code-wise? i'm prepared use native code, how it?

  • if attacker isn't 1.2.3.4 firewall can drop packets. no problem.

  • if tls authentication fails, there tcp connection, attacker knows it's valid open port. it's late pretend isn't.

  • socket.close() sends fin, not rst.

  • your master/slave terminology curious. 'slave' s tcp server, , 'master' tcp client.


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