linux平台的IDS（snort）
linux平台软件IDS（snort）安装报错求解！谢谢啦！执行这个命令报错
# ./snort -l /usr/local/snort/var/ -c /usr/local/snort/etc/conf/snort.conf -i eth0 -u snort -g snort
ERROR: /usr/local/snort/etc/conf/snort.conf(303) Unknown preprocessor: "ftp_telnet".
这是snort.conf第302-307行。
302 FTP / Telnet normalization and anomaly detection.For more information, see README.ftptelnet
303 preprocessor ftp_telnet: global inspection_type stateful encrypted_traffic yes
304preprocessor ftp_telnet_protocol: telnet \
305 ayt_attack_thresh 20 \
306 normalize ports { 23 } \
307 detect_anomalies \
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