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From: <hamals@infinito.it>
To: netfilter@lists.netfilter.org
Cc: franco.riggi@tiscali.it
Subject: bad tcp packets
Date: Tue, 23 Nov 2004 13:18:25 +0100	[thread overview]
Message-ID: <web-23112413@infinito.it> (raw)


Hello to everyone

I'm reading "Iptables Tutorial 1.1.19" by Oskar 
Andreasoon, and I cant understand these bad packets rules


$IPTABLES -N bad_tcp_packets
#
#
# bad_tcp_packets chain
#
$IPTABLES -A bad_tcp_packets -p tcp --tcp-flags SYN,ACK 
SYN,ACK \
-m state --state NEW -j REJECT --reject-with tcp-reset
$IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state 
--state NEW -j LOG \
--log-prefix "New not syn:"
$IPTABLES -A bad_tcp_packets -p tcp ! --syn -m state 
--state NEW -j DROP

someone could explain me why that are bad tcp packets?

Thanks

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             reply	other threads:[~2004-11-23 12:18 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-11-23 12:18 hamals [this message]
2004-11-23 12:42 ` bad tcp packets Miguel Angel Amador L
2004-11-23 13:49 ` Jason Opperisano
2004-11-23 13:59 ` Frank Gruellich
  -- strict thread matches above, loose matches on Subject: below --
2004-11-23 13:39 Scott Knake

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