snort firewall source code, the firewall has a very sound, according to function.

snort-1.7
.........\acconfig.h
.........\aclocal.m4
.........\AUTHORS
.........\backdoor-lib
.........\BUGS
.........\cdefs.h
.........\ChangeLog
.........\checksum.c
.........\checksum.h
.........\config.guess
.........\config.h.in
.........\config.sub
.........\configure
.........\configure.in
.........\contrib
.........\.......\ACID-0.9.5b9.tar.gz
.........\.......\address_config.sh
.........\.......\create_mysql
.........\.......\create_postgresql
.........\.......\Guardian.tar.gz
.........\.......\idmef-xml-plugin_0.1.tar.gz
.........\.......\mysql.php3
.........\.......\Net-SnortLog-0.1.tar.gz
.........\.......\passiveOS.tar.gz
.........\.......\pgsql.php3
.........\.......\README
.........\.......\snml.dtd
.........\.......\snort-sort.pl
.........\.......\snort2html.pl
.........\.......\snortdb-extra.gz
.........\.......\snortlog
.........\.......\snortnet.tar.gz
.........\.......\SnortSnarf-111500.1.tar.gz
.........\.......\snortwatch-0.7.tar.gz
.........\.......\snort_stat.pl
.........\.......\Spade-092200.1.tar.gz
.........\COPYING
.........\CREDITS
.........\ddos-lib
.........\decode.c
.........\decode.h
.........\finger-lib
.........\ftp-lib
.........\INSTALL
.........\install-sh
.........\LICENSE
.........\log.c
.........\log.h
.........\Makefile.am
.........\Makefile.in
.........\misc-lib
.........\missing
.........\mkinstalldirs
.........\mstring.c
.........\mstring.h
.........\netbios-lib
.........\NEWS
.........\overflow-lib
.........\parser.c
.........\parser.h
.........\ping-lib
.........\plugbase.c
.........\plugbase.h
.........\prototypes.h
.........\README
.........\README.database
.........\README.FLEXRESP
.........\README.PLUGINS
.........\README.Spade
.........\README.Spade.Usage
.........\README.tcpstream
.........\README.xml
.........\rpc-lib
.........\rules.c
.........\rules.h
.........\RULES.SAMPLE
.........\scan-lib
.........\smtp-lib
.........\snort.8
.........\snort.c
.........\snort.conf
.........\snort.h
.........\snprintf.c
.........\snprintf.h
.........\spo_alert_fast.c
.........\spo_alert_fast.h
.........\spo_alert_full.c
.........\spo_alert_full.h
.........\spo_alert_smb.c
.........\spo_alert_smb.h
.........\spo_alert_syslog.c
.........\spo_alert_syslog.h
.........\spo_alert_unixsock.c
.........\spo_alert_unixsock.h
.........\spo_database.c
.........\spo_database.h
.........\spo_log_tcpdump.c
.........\spo_log_tcpdump.h
.........\spo_xml.c

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