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SNI Client Hello Check with tcpdump
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| #!/bin/sh | |
| tcpdump -i any -s 1500 '(tcp[((tcp[12:1] & 0xf0) >> 2)+5:1] = 0x01) and (tcp[((tcp[12:1] & 0xf0) >> 2):1] = 0x16)' -An | |
| # sudo tcpdump dst port 9443 -A |
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