Snort is a libpcap-based packet sniffer/logger which can be used as a lightweight network intrusion detection system. It features rules based logging and can perform content searching/matching in addition to being used to detect a variety of attacks and probes, such as buffer overflows, stealth port scans, CGI attacks, SMB probes, and much more. Snort has a real-time alerting capabilty, with alerts being sent to syslog,a seperate "alert" file, or as WinPopup messages via Samba's smbclient.
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Snort is a libpcap-based packet sniffer/logger which can be used as a lightweight network intrusion detection system. It features rules based logging and can perform content searching/matching in addition to being used to detect a variety of attacks and probes, such as buffer overflows, stealth port scans, CGI attacks, SMB probes, and much more. Snort has a real-time alerting capabilty, with alerts being sent to syslog,a seperate "alert" file, or as WinPopup messages via Samba's smbclient.
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Snort is a libpcap-based packet sniffer/logger which can be used as a lightweight network intrusion detection system. It features rules based logging and can perform content searching/matching in addition to being used to detect a variety of attacks and probes, such as buffer overflows, stealth port scans, CGI attacks, SMB probes, and much more. Snort has a real-time alerting capabilty, with alerts being sent to syslog, a seperate "alert" file, or as WinPopup messages via Samba's smbclient.
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Snort is a libpcap-based packet sniffer/logger which can be used as a lightweight network intrusion detection system. It features rules based logging and can perform content searching/matching in addition to being used to detect a variety of attacks and probes, such as buffer overflows, stealth port scans, CGI attacks, SMB probes, and much more. Snort has a real-time alerting capabilty, with alerts being sent to syslog, a seperate "alert" file, or as WinPopup messages via Samba's smbclient.
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PowerPoint presentation on Snort - Lightweight Intrusion Detection for Networks.
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Snort is a libpcap-based packet sniffer/logger which can be used as a lightweight network intrusion detection system. It features rules based logging and can perform content searching/matching in addition to being used to detect a variety of attacks and probes, such as buffer overflows, stealth port scans, CGI attacks, SMB probes, and much more. Snort has a real-time alerting capabilty, with alerts being sent to syslog, a seperate "alert" file, or as WinPopup messages via Samba's smbclient.
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PostScript version of "Snort - Lightweight Intrusion Detection for Networks" by Martin Roesch! This paper discusses the architecture, performance, and uses of Snort. If makes a comparative analysis of Snort to some other wellknown programs used for similar purposes. There is also a nice rules tutorial contained in the document for those of you wanting to know how the rules system works.
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Text version of "Snort - Lightweight Intrusion Detection for Networks" by Martin Roesch! This paper discusses the architecture, performance, and uses of Snort. If makes a comparative analysis of Snort to some other wellknown programs used for similar purposes. There is also a nice rules tutorial contained in the document for those of you wanting to know how the rules system works.
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Version 1.3.1 of Snort, the lightweight network intrusion detection system. Version 1.3.1 fixes an annoying crash bug, plus enhances a number of features of the program. Invalid ICMP types/codes can now be filtered or monitored, the tcpdump file playback facility can use BPF filters, and the packet payload size check keyword now accepts greater than/less than modifiers.
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This snort-lib ruleset for the latest version of snort has over 150 rules.
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Snort 1.0.1 - Snort is a libpcap-based packet sniffer/logger which can be used as a lightweight network intrusion detection system. It features rules based logging which can perform content searching/matching and may be used to detect a variety of attacks and probes, such as buffer overflows, stealth port scans, CGI attacks, SMB probes, and much more. Snort has a real-time alerting capabilty, with alerts being sent to syslog or a seperate "alert" file.
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Snort v0.99b1 is a packet logger that reads and parses packets from the link layer through the transport layer, dumping explicit header information along the way. Good logging capabilities, useful for IDS, debugging network code. It now supports rules based logging and tracks conversations better, incorporates content based logging and automatic rules sorting, includes lots of bugfixes, and has improved ICMP filenames.
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Snort v0.99b2 is an extremely versatile packet logger. This version features dramatic speed improvements, a more logically laid out packet header print out, packet statistics, fragment detection, and more complete IP header decoding. One of the few "5 Star, Must Have!" programs around.
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Snort is an extremely versatile packet logger. This version features dramatic speed improvements, a more logically laid out packet header print out, packet statistics, fragment detection, and more complete IP header decoding. Improved timestamping (down to the millisecond) implemented. This release has TCP and IP option decoding, and some new rules stuff. You can now specify port ranges (or greater than/less than) and TCP flags in rules. This allows you to do things like this: alert tcp any any -> 192.168.1.0/24 :1024 {SF} 192.168.1.0/24 6000:6010 which will pick out inbound traffic going ports 6000 thru 6010. Also includes bugfixes, cleaned up fragment printout routines, truncated packet fragments get dumped in their own file, rules processor routine recoded and more flexible, much more. Several important bugfixes in this release, plus recoded IP/TCP option decoding, revised packet printout routines, and now logs illegal TCP and IP options as well in an IP_BOGUS log file.
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Snort v0.99rc3 is an extremely versatile packet logger. This version features dramatic speed improvements, a more logically laid out packet header print out, packet statistics, fragment detection, and more complete IP header decoding. Improved timestamping (down to the millisecond) implemented. This release has TCP and IP option decoding, and some new rules stuff. You can now specify port ranges (or greater than/less than) and TCP flags in rules. This allows you to do things like this: alert tcp any any -> 192.168.1.0/24 :1024 {SF} 192.168.1.0/24 6000:6010 which will pick out inbound traffic going ports 6000 thru 6010. Also includes bugfixes, cleaned up fragment printout routines, truncated packet fragments get dumped in their own file, rules processor routine recoded and more flexible, much more. Several important bugfixes in this release, plus recoded IP/TCP option decoding, revised packet printout routines, and now logs illegal TCP and IP options as well in an IP_BOGUS log file.
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snort-0.99rc5-lib is a set of example Snort rules. It's a short one, about 43 rules total, but it gives a good overview of the basic rule types and how to use the pattern matcher properly. This version of snort-lib includes a new buffer overflow (named) and some other stuff.
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Snort v0.99rc5 is an extremely versatile packet logger. This version features dramatic speed improvements, due to improved Boyer-Moore pattern match routine optimizations, a more logically laid out packet header print out, packet statistics, fragment detection, more complete IP header decoding, a new command line switch ("-e") to display/log the Ethernet header, plus TOS field and IP Fragment ID field display/logging. Improved timestamping (down to the millisecond) implemented. This release also has TCP and IP option decoding, and lots of new rules. You can now specify port ranges (or greater than/less than) and TCP flags in rules. This allows you to do things like this: alert tcp any any -> 192.168.1.0/24 :1024 {SF} 192.168.1.0/24 6000:6010 which will pick out inbound traffic going ports 6000 thru 6010. Also includes bugfixes, cleaned up fragment printout routines, truncated packet fragments get dumped in their own file, rules processor routine recoded and more flexible, much more. Several important bugfixes in this release, plus recoded IP/TCP option decoding, revised packet printout routines, and now logs illegal TCP and IP options as well in an IP_BOGUS log file.
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Snort is a libpcap-based packet sniffer/logger. It reads and decodes packets from the link layer through the application layer, dumping the decoded packet data. It can log these packets in their decoded form to directories which are generated based upon the IP address of the remote computer. This allows it to be used as a sort of "poor man's intrusion detection system" if you specify what traffic you want to record and what to let pass.
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Snort v0.97 - packet logger - This program reads and parses packets from the link layer through the transport layer, dumping explicit header information along the way. Good logging capabilities, useful for IDS, debugging network code.
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Snort v0.98 - packet logger - This program reads and parses packets from the link layer through the transport layer, dumping explicit header information along the way. Good logging capabilities, useful for IDS, debugging network code. It now supports rules based logging and tracks conversations better.
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Snort v0.99 - packet logger - This program reads and parses packets from the link layer through the transport layer, dumping explicit header information along the way. Good logging capabilities, useful for IDS, debugging network code. It now supports rules based logging and tracks conversations better, incorporates content based logging and automatic rules sorting. 66k.
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Snort v0.99rc6 is an extremely versatile packet logger. This version of Snort has a new rules set implementation. The new set is more flexible and easier to add new user requested rule types to from a programmatic standpoint. It also includes new rule types to be able to detect TTL values and ICMP type/codes. Rc6 also has a completely rewritten, unified reporting system, so the output is consistent across all output file types (logs/alerts/fragments/etc).
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snort-1.0-lib is a set of example Snort rules. It's short, but gives a good overview of the basic rule types and how to use the pattern matcher properly. This version of snort-lib includes alot of new stuff.
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snort-lib is a set of example Snort rules. It's a short one, about 43 rules total, but it gives a good overview of the basic rule types and how to use the pattern matcher properly.
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Snort is a libpcap-based sniffer/packet logger. It's fairly portable and tested on Solaris 2.5.1 (Sparc), Solaris 2.6 (x86), Linux, and FreeBSD.
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