iptables drop packet by hex string match
- by Flint
I got this packet captured with tcpdump but I'm not sure how to use the --hex-string param to match the packet. Can someone show me how to do it?
11:18:26.614537 IP (tos 0x0, ttl 17, id 19245, offset 0, flags [DF], proto UDP (17), length 37)
x.x.187.207.1234 > x.x.152.202.6543: [no cksum] UDP, length 9
0x0000: f46d 0425 b202 000a b853 22cc 0800 4500 .m.%.....S"...E.
0x0010: 0025 4b2d 4000 1111 0442 5ebe bbcf 6701 .%[email protected]^...g.
0x0020: 98ca 697d 6989 0011 0000 ffff ffff 5630 ..i}i.........V0
0x0030: 3230 3300 0000 0000 0000 0000 203.........