From: Slava Dubrovskiy <slava@psv.com.ua> To: Community@altlinux.ru Subject: [Comm] Битые пакеты? Date: Thu, 23 Oct 2003 17:43:28 +0300 Message-ID: <3F97E910.7020009@psv.com.ua> (raw) Hello Community! Стоит вот такой фильтр ...... $IPTABLES -N bad_tcp_packets $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 ...... $IPTABLES -A INPUT -p tcp -j bad_tcp_packets ...... И периодически получаю в лог вот такие записи: Oct 23 17:22:44 server kernel: New not syn:IN= OUT=lo SRC=192.168.1.1 DST=192.168.1.1 LEN=51 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=TCP SPT=36977 DPT=143 WINDOW=49188 RES=0x00 ACK PSH FIN URGP=0 Oct 23 17:23:10 server last message repeated 5 times Oct 23 17:24:30 server last message repeated 2 times Что это такое? Кто может посылать с интерфейса lo пакеты NEW без бита --syn? Или я не правильно настроил фильтрацию? Слава Д.
next reply other threads:[~2003-10-23 14:43 UTC|newest] Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top 2003-10-23 14:43 Slava Dubrovskiy [this message] 2003-10-26 13:28 ` Borovoy M.
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