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| version 1.1, 1996/01/09 09:29:47 | version 1.2, 1996/07/18 05:57:23 | ||
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| # block all TCP packets with only the SYN flag set (this is the first | # block all TCP packets with only the SYN flag set (this is the first | ||
| # packet sent to establish a connection) out of the SYN-ACK pair. | # packet sent to establish a connection) out of the SYN-ACK pair. | ||
| # | # | ||
| block proto tcp from any to any flags S/SA | block in proto tcp from any to any flags S/SA |