hiding messages in tcp header using scapy; retrieving messages from iptables LOG...

scapy tcp header fu

#!/usr/bin/env python
import binascii
from scapy.all import TCP, IP
ip  = IP(dst="192.155.82.5")
tcp = TCP(dport   = 6200, 
              flags   = 'S',
              seq     = 32456,
              ack     = 32456,
              window  = 32456,
              options = [('MSS',binascii.unhexlify("DEADBEEFCAFEF1F1F0F2FFFFFFFFFF0F0F0F0F0F0F0FFFFFFFFFFFFFFFFFFFFF"))])
send(ip/tcp)



"""
Sep 30 04:44:33 localhost kernel: REJECT IN=eth0 OUT= MAC=... SRC=x.x.x.x DST=y.y.y.y LEN=76 TOS=0x00 PREC=0x00 TTL=51 ID=1 PROTO=TCP SPT=20 DPT=6200 SEQ=32456 ACK=32456 WINDOW=32456 RES=0x00 SYN URGP=0 OPT (0222DEADBEEFCAFEF1F1F0F2FFFFFFFFFF0F0F0F0F0F0F0FFFFFFFFFFFFFFFFFFFFF0000)
"""